D.C. Mun. Regs. tit. 11, r. 11-B100
For the purpose of this title, the following definitions shall not be held to modify or affect in any way the legal interpretations of these terms or words where used in other regulations:
When used in this title, the following terms and phrases shall have the meanings ascribed:
1958 Zoning Regulations: The regulations that were originally adopted and became effective at 12:01 a.m., May 12, 1958, as amended.
2016 Zoning Regulations: The current regulations adopted through the publication of a notice of final rulemaking published in the D.C. Register on March 2, 2016 and which became effective at 12:01 a.m., September 6, 2016, as those regulations may thereafter be amended. See Subtitle A § 101.
Accessory Apartment: A dwelling unit that is secondary to the principal single household dwelling unit in terms of gross floor area, intensity of use, and physical character, but which has kitchen and bath facilities separate from the principal dwelling and may have a separate entrance.
Adult day treatment facility: A building or part of a building used for non-residential programs operated for the purpose of providing medically supervised day treatment services for adults with a developmental disability or mental disorder, totaling six (6) or more persons who are present for fewer than twenty-four (24) hours per day. An adult day treatment facility includes the following accessory uses: counseling, education, training, health, and social services for the person or persons with legal charge of individuals attending the center, including, but not limited to, any parent, spouse, sibling, child, or legal guardian of such individuals. This definition does not encompass facilities that offer drug or alcohol abuse rehabilitation services. For the purposes of this definition, the following sub-definitions apply:
Mental disorder - an abnormal mental condition in an individual who requires a comprehensive and relatively intensive range of mental health services in a therapeutic and structured environment if he or she is to remain in the community or if he or she is to move from twenty-four (24) hour institutional care to the community.
Developmental disability - a severe, chronic disability of a person that is attributable to a mental or physical impairment, or both, that is manifested before the person attains the age of twenty-two (22) years and is likely to continue indefinitely. The impairment causes substantial functional limitations in three (3) or more areas of major life activity:
A developmental disability reflects the person's need for a combination and sequence of special, interdisciplinary or generic care, treatment, or other service, which are life-long or of extended duration, and are individually planned and coordinated.
Adult Rehabilitation Home: A facility providing residential care for one (1) or more individuals sixteen (16) years of age or older who are charged by the United States Attorney with a felony offense, or any individual twenty-one (21) years of age or older, under pre-trial detention or sentenced court orders;
Advisory Neighborhood Commission (ANC): A duly elected body established in accordance with § 738 of the District of Columbia Home Rule Act, approved December 24, 1973 (87 Stat. 774, 824, as amended; D.C. Official Code § 1-207.38).
Affected Advisory Neighborhood Commission: The ANC for the area within which the property that is the subject of a Zoning Commission or Board of Zoning Adjustment application or appeal is located, except that if the subject property is located on a street that serves as a boundary line between two ANCs, then the term "affected ANC" means both ANCs.
Affordable Housing: Housing where costs, including utilities and any mandatory fees for rental or mortgage principle and interest, taxes, insurance and any mandatory fees, do not exceed thirty percent (30%) of the targeted household income ranges.
Airspace Development: Development above or below streets or alleys.
Alley: A public way, whether named or unnamed, designated as an alley in the records of the Surveyor of the District of Columbia. An alley is not a street for the purposes of this title.
Alterations, Structural: Any change in the permanent, physical members of a building or other structure, such as bearing walls or partitions, columns, joists, rafters, beams, or girders.
Angular Plane: A plane, based on a defined angle, that a building fare may be set up to, or behind.
Animal Boarding: Any premises, other than a veterinary hospital, pet shop, or pet grooming establishment, used as a commercial establishment for the overnight boarding and/or recurring daily care of animals for a fee. Any pet grooming establishment that permits ten (10) or more animals on the premises at a time, or that permits the overnight stay of animals, is considered an animal boarding use.
Animal Shelter: Any premises that houses and feeds stray or abandoned animals without a fee and is operated by a non-profit organization or governmental agency.
Antenna: A device used to transmit or receive communications signals. This term encompasses transmitting and receiving elements, and rotating or other directional mechanism.
Antenna Tower: A lattice-type structure, guyed or self-supporting, used to support antennas for broadcasting, transmission, reception, or other utility equipment. Such structures shall not be deemed ground-mounted antennas as that term is used in this chapter.
Antenna, Building-mounted : Any antenna and its necessary support structure, not including an antenna tower or monopole, that is attached to the walls of, or integrated into, a building, church steeple, cooling tower, elevator bulkhead, parapet, penthouse or rooftop structure, fire tower, tank, water tower, or other similar structure.
Antenna, Ground-mounted: Any freestanding antenna with its base placed directly on the ground. Ground does not include artificially elevated terrain such as berms or planter boxes but may include graded lawns, terraced landscapes that are formed from the natural grade, and at-grade patios.
Antenna, Roof-mounted: Any antenna and its necessary support structure, not including an antenna tower or monopole, that is attached to the roof of a building and which does not fall within the definition of a building-mounted antenna.
Apartment: One (1) or more habitable rooms with kitchen and bathroom facilities exclusively for the use of and under the control of the occupants of those rooms. Control of the apartment may be by rental agreement or ownership.
Apartment House: Any building or part of a building in which there are three (3) or more apartments, providing accommodation on a monthly or longer basis.
Arcade, open: A continuous area, located along the perimeter of a building, designed for pedestrian uses, and which adjoins a street for its entire length; and, except for structural piers, columns, or arches, is open to the street. See also: Subtitle B, Chapter 3.
Areaway: A subsurface space adjacent to a building that is open at the top or protected at the top by a grating or guard and that provides a passageway accessing a basement/cellar door.
Art Center: A multifunctional arts use that comprises two (2) or more distinct arts design and creation uses integrated under single management.
Art Exhibition Area: A building lobby, part of a lobby, or other publicly accessible space on the basement or first or second floors of a building or an outdoor public area on private property, which space is designed and used for the public display and sale of works of art.
Art Gallery: an establishment that derives more than fifty percent (50%) of its income from the display and sale of objects of art.
Art Incubator: An arts use that:
When located in any residential zone pursuant to Subtitle A § 101.8(a), the art incubator may have up to six (6) public sales per year for art produced in the incubator, and up to six (6) performances per year of dramatic or performance art produced in the incubator.
Artist Live-Work Space: A dwelling unit or building in which an artist or artists reside and work in an artist studio use in compliance with the requirements of one (1) of the following categories:
Artist Studio: A place of work of one (1) or more persons who are engaged actively and, either gainfully or as a vocation, work in the following:
In residential zones the artist may sell art produced on site as a clearly incidental part of the studio use.
Ballpark: The building and use authorized by Zoning Commission Order No. 06-22.
Basement: That portion of a story partly below grade where the finished floor of the ground floor is five feet (5 ft.) or more above the adjacent natural or finished grade, whichever is the lower in elevation.
Bedroom: A habitable room with immediate access to an exterior window and a closet that is designated as a "bedroom" or "sleeping room" on construction plans submitted in an application for a building permit.
Bicycle Parking: See Parking Space, Bicycle.
Blockface: The entire front lot line of all building faces of a square between two (2) streets.
Board of Zoning Adjustment (Board): An independent quasi-judicial body empowered to grant relief from the strict application of the Zoning Regulations (variances), approve certain uses of land (special exceptions), and hear zoning appeals.
Boarding House: A building or part thereof where, for compensation, lodging and meals are provided to three (3) or more guests on a monthly or longer basis; a boarding house shall be considered a residential structure.
Boathouse: A building or structure designed and used to store and provide water access for non-motorized watercraft, including racing shells, kayaks, canoes, sailboats, rowboats, and similar boats.
Building: A structure requiring permanent placement on the ground that has one (1) or more floors and a roof supported by columns or walls. When separated from the ground up or from the lowest floor up, each portion shall be deemed a separate building, except as provided elsewhere in this title. The existence of communication between separate portions of a structure below the main floor shall not be construed as making the structure one (1) building.
Building, Accessory: A subordinate building located on the same lot as the principal building, the use of which is incidental to the use of the principal building.
Building Area: The maximum horizontal projected area of a principal building and its accessory buildings. Except for outside balconies, this term shall not include any projections into open spaces authorized elsewhere in this title.
Building area shall not include: Building components or appurtenances dedicated to the environmental sustainability of the building; cornices and eaves; sills, leaders, belt courses, and similar ornamental or structural features; awnings, serving a window, porch, deck or door; uncovered stairs, landings, and wheelchair ramps that serve the main floor; and chimneys, smokestacks, or flues.
Building, Detached: A building that is completely separated from all other buildings and has two (2) side yards.
Building Envelope: The maximum three (3) dimensional space on a lot in which a building may be built as limited by the applicable development standards and other relevant limits and conditions of this Title.
Building Facade: An exterior vertical plane, face, or side of a building, exclusive of any permitted projections.
Building, Height of: The vertical distance measured from the Building Height Measuring Point to a point designated in a zone district, subject to limitations in the regulations.
Building Height Measuring Point (BHMP): The point used in measuring building heights in a zone in accordance with §§ 307 or 308 of this subtitle except as may be stated elsewhere in this title, as applicable, and subject to limitations in the regulations.
Building Line: A line beyond which property owners have no legal or vested right to extend a building or any part of the building without special permission and approval of the proper authorities; ordinarily a line of demarcation between public and private property, but also applied to building restriction lines, when recorded on the records of the Surveyor of the District of Columbia.
Building, Principal: The building in which the primary use of the lot is conducted.
Building, Row: A building that has no side yards. The terms "row dwelling" and "row house" shall have the same meaning as row building.
Building, Semi-detached: A building that has only one (1) side yard.
Building, Separate: Structures that are separated from the ground up by common division walls or contain multiple sections separated horizontally, such as wings or additions, are separate buildings. Structures or sections shall be considered parts of a single building if they are joined by an enclosed connection that is fully above grade, is heated and artificially lit; and either a common space shared by users of all portions of the building, such as a lobby or recreation room, or space that is designed and used to provide free and unrestricted passage between separate portions of the building, such as an unrestricted doorway or walkway.
Build-to Line: A front setback line that the front face of the principal building of the lot must abut.
Bulkhead: A retaining wall or protective structure along a shoreline whose primary purpose is to stabilize, hold, or prevent earth or backfill from eroding or washing away. For purposes of this definition, the term bulkhead does not differentiate between and includes bulkheads, seawalls, and revetments.
Car Wash: A structure or portion of a structure, the principal use of which is the washing of automobiles or other motor vehicles with the use of a chain or other conveyor and blower or steam cleaning device.
Caregiver: An individual who is responsible for the supervision and administration of a child development home, expanded child development home, or child/elderly development center.
Car-share Organization : A membership based service with a valid business license providing shared vehicles available twenty-four (24) hours a day, seven (7) days a week, at unattended self-serve locations. Vehicles are provided without restriction at hourly rates that include fuel, insurance, and maintenance primarily for shorter time and shorter distance trips.
Car-sharing Space: A parking space that is designated for the parking of a car-sharing vehicle.
Car-sharing Vehicle: Any vehicle available to multiple users who are required to join a membership organization in order to reserve and use such a vehicle, and for which they are charged based on actual use as determined by time and/or mileage.
Caterer, Catering Establishment: A person or business that prepares and provides food, beverages, or both, along with the necessary accessories for serving these products, for consumption. The food and beverages are provided for events that are located off the business establishment's premises. Any establishment that receives more than seventy-five percent (75%) of its sales from orders placed less than three (3) hours prior to delivery or pick-up will not be considered a catering establishment.
Cellar: That portion of a story partly below grade where the finished floor of the ground floor is less than five feet (5 ft.) above the adjacent natural or finished grade, whichever is the lower elevation.
Central Area: The area included within the combined boundaries of the Urban Renewal Plan for the Downtown Urban Renewal Area and the Urban Renewal Plan for the Shaw School Urban Renewal Area, as approved and modified periodically by the National Capital Planning Commission and the Council of the District of Columbia.
Central Employment Area (CEA): The core area of the District of Columbia where the greatest concentration of employment in the city and region is encouraged. The geographic boundaries of the CEA are detailed in the Comprehensive Plan.
Chancery: The principal offices of a foreign mission used for diplomatic or related purposes, and annexes to such offices (including ancillary offices and support facilities), including the site and any building on such site that is used for such purposes.
Child Development Center: A building or part of a building, other than a child development home, used for the non-residential licensed care, education, counseling, or training of individuals under the age of fifteen (15) years of age and, totaling seven (7) or more persons, who are not related by blood or marriage to the caregiver and who are present for less than twenty-four (24) hours per day. This definition encompasses facilities generally known as child care centers, pre-schools, nursery schools, before-and-after school programs, and similar programs and facilities. A child development center includes the following accessory uses: counseling, education, training, and health and social services for the person or persons with legal charge of individuals attending the center, including, but not limited to, any parent, spouse, sibling, child, or legal guardian of such individuals.
Child Development Home: A dwelling unit used in part for the licensed care, education, or training of no more than six (6) individuals fifteen (15) years of age or less including all individuals age four (4) and younger who reside in the dwelling unit. Those individuals receiving care, education, or training who are not related by blood, marriage, or adoption to the caregiver shall be present for less than twenty-four (24) hours per day. This definition encompasses facilities generally known as a child care center, day (2012 care center, pre-school, nursery school, before-and-after school programs, and similar programs and facilities.
Clinic: A building or part of a building in which members of the medical or dental professions are associated for the purpose of conducting a joint practice of the professions. Each clinic shall contain a diagnostic center and, in addition, may contain research, educational, minor surgical, or treatment facilities; provided that all the facilities are limited to the treatment and care of out-patients.
The term "clinic" shall be limited to those buildings in which the joint practice of medical or dental professions is conducted in such a manner that all fees for services rendered are established by and paid to a common business office without direct payment of the fees to individual practitioners, and shall not include a building in which the separate and individual practice of the above professions is conducted.
Club, Private: A building and facilities or premises used or operated by an organization or association for some common avocational purpose such as, but not limited to, a fraternal, social, educational, or recreational purpose; provided, that the organization or association shall be a non-profit corporation and registered with the U.S. Internal Revenue Service; goods, services, food, and beverages shall be sold on the premises only to members and their guests; and office space and activities shall be limited to that necessary and customarily incidental to maintaining the membership and financial records of the organization.
Collocation: The use of a single mount, tower, monopole, or site by more than one (1) antenna or telecommunications service provider.
Commission: The Zoning Commission for the District of Columbia, unless otherwise noted.
Community Centers, Private: A building, park, playground, swimming pool, or athletic field operated by a local community organization or association.
Community Service Use: A not-for-profit use established primarily to benefit and serve the population of the community in which it is located.
Community Residence Facility: A facility that meets the definition for and is licensed under the District of Columbia Health Care and Community Residence Facility, Hospice and Home Care Licensure Act of 1983, effective February 24, 1984 (D.C. Law 5-48; D.C. Official Code §§ 44-501et seq.)
Community Solar Facility: A solar energy facility that is directly interconnected with the distribution system of the electric company, as defined by D.C. Official Code § 34-207, and that does not exceed five megawatts (5 MG) in capacity, where the monetary value of the electricity generated by the facility is credited to the subscribers, which must number at least two (2). Community solar facilities are characterized by the sharing of electricity output, which is provided to subscribers. Examples include but are not limited to roof- mounted solar arrays, ground- mounted solar arrays, or solar canopies, but would not include basic utility uses.
Comprehensive Plan: The Comprehensive Plan for the National Capital adopted pursuant to § 4(a) of the National Capital Planning Act of 1952, approved July 10, 1952 (66 Stat. 774, 781, 785, as amended; D.C. Official Code §§ 2-1002(a)), and §§ 203 and 423 of the District of Columbia Self-Government and Governmental Reorganization Act, approved December 24, 1973 (87 Stat. 779, 792; D.C. Official Code §§ 1-204.23, 2-1002(a)).
Continuing Care Retirement Community: A building or group of buildings providing a continuity of residential occupancy and health care for elderly persons. This facility includes dwelling units for independent living, assisted living facilities, or a skilled nursing care facility of a suitable size to provide treatment or care of the residents; it may also include ancillary facilities for the further enjoyment, service, or care of the residents. The facility is restricted to persons sixty (60) years of age or older or married couples or domestic partners where either the spouse or domestic partner is sixty (60) years of age or older.
Corner Store: A limited commercial and service use in residential rowhouse zones, oriented to serve the immediate neighborhood.
Cottage Food Business: A business that:
Cottage Food Product: A food product made in compliance with the Cottage Food Act effective January 25, 2014 (D.C. Law 20-63; D.C. Official Code §§7-749.01et seq.) and that is sold at a farmer's market or other public venues.
Court: An unoccupied space, not a court niche, open to the sky, on the same lot with a building, which is bounded on two (2) or more sides by the exterior walls of the building or by two (2) or more exterior walls, lot lines, or yards. A court may also be bounded by a single curved wall of a building
Court, Closed: A court surrounded on all sides by the exterior walls of a building, or by exterior walls of a building and side or rear lot lines, or by alley lines where the alley is less than ten feet (10 ft.) in width.
Court, Height of: The vertical distance from the lowest level of the court to the highest point of any bounding wall.
Court, Length of: The mean horizontal distance between the open and closed end of an open court or the greater horizontal dimension of a closed court.
Court Niche: an indentation, recess, or decorative architectural treatment of the exterior wall of a building, not a court, which opens onto a street, yard, alley, or court.
Court Niche, Depth of: the greatest distance between the sides of the court niche, measured perpendicular to the line delineating the width of court niche.
Court Niche, Width of: the distance between the two (2) points created by the intersection of the sides of the court niche and the sides of the court, yard, street, or alley it abuts.
Court, Open: A court opening onto a street, yard, or an alley not less than ten feet (10 ft.) wide.
Court, Width of: The minimum horizontal dimension substantially parallel with the open end of an open court or the lesser horizontal dimension of a closed court; or, in the case of a non-rectangular court, the diameter of the largest circle that may be inscribed in a horizontal plane within the court.
Development, Inclusionary: A residential development subject to the provisions of Subtitle C, Chapter 10, Inclusionary Zoning.
Dinner Theater: A restaurant with a stage or performing area where the main activity is the serving of dinner and, following dinner, the performance of a play or musical theater.
Director: The Director of the Office of Zoning or such successor official as shall be designated to be the supervisor of the full-time administrative staff of the Commission and Board, unless otherwise noted.
District of Columbia Construction Codes: The District of Columbia Construction Codes and District of Columbia Construction Codes Supplement as those terms are further described at 12 DCMR A § 101.1.
Driver's License Road Test Facility: A building and associated paved area used by the District of Columbia Department of Motor Vehicles in connection with road tests or other tests of driving ability given to applicants for drivers' licenses or endorsements.
Drive-Through: A system designed to permit customers of an establishment to obtain goods or services by driving through the property and conducting the transaction while the customer remains within a motor vehicle. The system has two (2) major parts: a vehicular queuing lane or lanes, and one (1) or more service locations where customers place orders or receive services or both. No part of this definition shall be construed to apply to a gasoline service station.
Dwelling, Multiple: A building containing three (3) or more dwelling units or rooming units, or any combination of these units totaling three (3) or more.
Dwelling Unit: One (1) or more habitable rooms comprising complete independent living facilities for one (1) or more persons, and including within those rooms permanent provisions for living, sleeping, eating, cooking, and sanitation. A dwelling unit is intended for a single household.
Dwelling Unit, Principal: The primary residential structure on a lot.
El: An uncovered, unoccupied space, bounded by a side lot line and two (2) exterior walls of a building.
Elderly Day Care Home: A dwelling unit used in part for the care, education, recreation, or training of no more than five (5) elderly individuals who are not related by blood or marriage to the caregiver and who are present for less than twenty-four (24) hours per day. This definition encompasses facilities generally known as senior care centers, elder care programs, and similar programs and facilities.
Elderly Development Center: A building or part of a building, other than an elderly day care home, used for the non-residential care of individuals age sixty-five (65) or older, totaling seven (7) or more persons, who are not related by blood or marriage to the caregiver and who are present for less than twenty-four (24) hours per day. This definition encompasses facilities generally known as senior care centers, elder care programs, and similar programs and facilities. An elderly development center includes the following accessory uses: counseling; education, training, and health and social services for the person or persons with legal charge of individuals attending the center, including, but not limited to, any parent, spouse, sibling, child, or legal guardian of such individuals.
Electronic Equipment Facility (EEF): A facility or space used primarily for or intended to be used primarily for the housing, operation, and/or co-location of computer equipment that provides:
Embassy: The official residence of an ambassador or other chief of a diplomatic mission, or that portion of a combined chancery/embassy devoted to use as such official residence.
Emergency Shelter: A facility providing temporary housing for one (1) or more individuals who are otherwise homeless as that arrangement is defined in the Homeless Services Reform Act of 2005, effective October 22, 2005 (D.C. Law 16-35; D.C. Official Code §§ 4-751.01 et seq.); an emergency shelter use may also provide ancillary services such as counseling, vocational training, or similar social and career assistance.
Enclosed Pedestrian Space: An area located within a building designed for pedestrian use and enclosed on all sides that may be covered by a roof of a transparent material that exposes the area to natural light.
Equipment Cabinet or Shelter: An enclosure housing only equipment related to the operation of an antenna located at the site and connected to the antenna by cable.
Expanded Child Development Home: a dwelling unit used in part for the licensed care, education, or training for more than six (6) individuals, up to a maximum of twelve (12) individuals fifteen (15) years of age or less including all individuals age four (4) and younger who reside in the dwelling unit, provided that no more than six (6) of the individuals may be under two (2) years of age. Those individuals receiving care, education, or training who are not related by blood, marriage, or adoption to the caregiver shall be present for less than twenty- four (24) hours per day. This definition encompasses facilities generally known as a child care center, day care center, pre-school, nursery school, before-and-after school programs, and similar programs and facilities.
Farmers Market: A temporary market, open to the public for no charge, held in an open area where groups of individual sellers offer for sale to the public such items as agricultural produce, seasonal fruits and vegetables, fresh flowers, meats, eggs, and honey that they produce or grow; items for sale may also include items made from the agricultural produce such as baked goods, jams, jelly, and sausages; sales are customarily made from temporary booths or vehicles located on site. The market may operate daily, intermittently throughout the week, or seasonally.
Fast Food, Drive-through: A fast food restaurant that includes a drive-through and may not provide customer seating.
Fast Food, Restaurant: A business, other than a prepared food shop, where food is prepared and served very quickly; and where the food is typically made of preheated or precooked ingredients, served to the customer in a packaged form for carry-out/take-away, although it may be eaten on site.
Characteristics of a fast food establishment may include:
An establishment meeting this definition shall not be deemed to constitute any other use permitted under the authority of these regulations, except that a restaurant, grocery store, movie theater, or other use providing carry out sales that is clearly subordinate to its principal use shall not be deemed a fast-food establishment.
Firearm: a gun, pistol, or any weapon capable of firing a projectile and using an explosive charge as a propellant.
Firearms Retail Sales Establishment: An establishment engaged in the sale, lease, or purchase of firearms or ammunition. If an establishment is a firearms retail sales establishment as defined here, it shall not be deemed to constitute any other use permitted under the authority of this title.
Fire Department: the Fire and Emergency Medical Services Department of the District of Columbia.
Fire Station: A building and associated land used by the Fire Department to house personnel and equipment in connection with the provision of fire, rescue, emergency medical, hazardous materials response, and other types of emergency services throughout the District- of Columbia, and includes the harbor facility.
Flat: A dwelling used exclusively as a residence for two (2) families living independently of each other.
Floating Home: A sailboat, motorboat, or other floating structure that is designed and built to be used, or is modified to be used, as a waterborne residential dwelling, is dependent for utilities upon a utility linkage to a source originating on shore, and in which the tenant or owner sleeps overnight an average of fifteen (15) days per month.
Floor Area Ratio (FAR): The ratio of the total gross floor area of a building to the area of its lot measured in accordance with § 303 of this subtitle, except as may be stated elsewhere in this title.
Floor, Ground: The floor level nearest to and above the adjacent finished grade.
Food Delivery Service: A restaurant, prepared food shop, or fast food establishment, in which the principal use is production of prepared food for delivery to customers located off the business premises. Seating and tables for customers may or may not be provided for on-premises consumption, but if present are clearly subordinate to the principal use of preparing food for delivery to off-site customers. Any establishment that derives more than seventy-five percent (75%) of its sales from delivery orders will be considered a food delivery service in all cases. This definition does not include catering establishments.
Gallery, Display: An establishment that displays and may sell art, but that does not derive more than fifty percent (50%) of its income from the display and sale of objects of art.
Gallery, Retail: An establishment that derives more than fifty percent (50%) of its income from the display and sale of objects of art.
Garage, Automated Parking: A building or other structure, or part thereof, in which parking is accomplished by means of shuttles, platforms, dollies, or other mechanisms that move vehicles around and where such movement is controlled by computers. The facility may be self-service or it may be staffed to accept payment or observe operations where vehicles enter or exit the automated environment. May also be a parking garage or public storage garage.
Garage, Private: A building or other structure, or part of a building or structure, not exceeding nine hundred square feet (900 sq. ft.) in area, used for the parking of motor vehicles and having no repair or service facilities other than a means by which to charge batteries or an electric vehicle.
Garage, Parking: A building or other structure, or part of a building or structure, over nine hundred square feet (900 sq. ft.) in area, used for the parking of one (1) or more motor vehicles and where any services are minor and incidental such as charging a battery, washing or detailing a vehicle, tire inflation, replacing bulbs and wiper blades, and an electric vehicle charging station.
Garage, Public Storage: a building or other structure, or part of a building or structure, in which any repair, greasing, washing, or similar services are incidental to its primary use for the parking of motor vehicles.
Garage, Repair: A building or other structure, or part of a building or structure, with facilities for the repair of motor vehicles, including body and fender repair, painting, rebuilding, reconditioning, upholstering, equipping, or other motor vehicle maintenance or repair.
Gasoline Service Station: An area of land, including any structures on the area, used for the retail sale of motor fuel and lubricants and incidental services such as lubrication and hand-washing of motor vehicles, and the sale, installation, or minor repair of tires, batteries, or other automobile accessories. The term gasoline service station shall not include a car wash or a repair garage.
Geographically Modified Zones: Base zones that are amended through the adoption of specific regulations and limited to a specified geographic boundary.
Glass, Clear and/or Low-Emissivity: Glass with a visible light transmission rating of at least seventy percent (70%) and an outdoor visible light reflectance rating of no greater than seventeen percent (17%).
Grade, Exceptions to: The following are exceptions to "Finished Grade" and "Natural Grade" as those terms are defined below:
Grade, Finished: The elevation of the ground directly abutting the perimeter of a building or structure or directly abutting an exception to finished grade. Exceptions to Finished Grade are set forth in the definition of "Grade, Exceptions to."
Grade, Natural: The undisturbed elevation of the ground of a lot prior to human intervention; or where there are existing improvements on a lot, the established elevation of the ground, exclusive of the improvements or adjustments to the grade made in the five (5) years prior to applying for a building permit Exceptions to Natural Grade are set forth in the definition of "Grade, Exceptions to."
Green Area Ratio (GAR): Ratio of the weighted value of landscape elements to lot area See Also: Subtitle C, Chapter 6.
Grocery Store: A use whose primary business is the sale of fresh produce and food products. At least fifty percent (50%) of customer-accessible sales and display area is used for the sale of a general line of food products intended for home preparation and consumption, and at least thirty percent (30%) of retail space is for perishable goods that include dairy, fresh produce, fresh meats, poultry, fish, and frozen foods. Groceries represent the majority of the sales in a grocery store although there may be accessory uses such as prepared food and drink, pharmaceuticals, and bank services.
Gross Floor Area (GFA): Unless otherwise specified, the sum of the gross horizontal areas of all floors of all buildings on a lot, measured from the exterior faces of exterior walls and from the center line of walls separating two (2) buildings as measured in accordance with § 304 of this subtitle, except as may be stated elsewhere in this title.
Group Instruction Center or Studio: An establishment that principally offers group instruction in the performing arts, the martial arts, physical exercise, or yoga.
Habitable Room: An undivided enclosed space used for living, sleeping, or kitchen facilities.
Health Care Facility : A facility that meets the definition for and is licensed under the District of Columbia Health Care and Community Residence Facility, Hospice and Home Care Licensure Act of 1983, effective February 24, 1984 (D.C. Law 5-48; D.C. Official Code §§ 44-501, et seq.)
Height Act: The Act to Regulate the Height of Buildings in the District of Columbia, approved June 1, 1910, as amended (36 Stat. 452, as amended; D.C. Official Code §§ 6-601.01 to 6-601.09).
Height, Floor-to-Ceiling Clear: The vertical distance measured from the finished floor to the underside of the finished ceiling. (See Subtitle B § 328.)
Historic District: An area listed as an historic district in the D.C. Inventory of Historic Sites, or which the State Historic Preservation Officer has nominated or issued a written determination to nominate to the National Register of Historic Places after a public hearing before the Historic Preservation Review Board.
Historic Landmark: A building, structure, object or feature, and its site, or a site that is listed in the D.C. Inventory of Historic Sites, or for which an application for listing is pending with the Historic Preservation Review Board (provided the statutory time period for consideration of the application has not expired).
Historic Landmark and Historic District Protection Act of 1978: An Act adopted by the Council of the District of Columbia effective March 3, 1979, as amended (D.C. Law 2-144; D.C. Official Code §§ 6-1101 to 6-1115).
Historic Resource: A historic landmark or a building, structure, object or feature, and its site, that contributes to the character of a historic district, as determined in accordance with the Historic Landmark and Historic District Protection Act of 1978.
Home Occupation: An accessory use, including a business, profession, or other economic activity, which is conducted full-time or part-time in a dwelling unit or its accessory building or accessory structure that serves as the principal residence of the practitioner.
Home Sales Party: a gathering that is held at a dwelling of any kind for the purpose of selling or distributing goods or services.
Hospice: A program of in-house, outpatient, or inpatient medical nursing, counseling, bereavement, and other palliative and supportive services to terminally ill individuals and their families.
Hotel: A building or part of a building in which not less than thirty (30) habitable rooms or suites are reserved primarily for transient guests who rent the rooms or suites on a daily basis and where meals, prepared in a kitchen on the premises by the management or a concessionaire of the management, may be eaten in a dining room accommodating simultaneously not less than thirty (30) persons. The dining room shall be internally accessible from the lobby. The term "hotel" shall not be interpreted to include an apartment house, rooming house, boarding house, or private club. All areas within a hotel shall be included in one (1) of the following categories:
Household: Shall be defined as one (1) of the following:
Housing Trust Fund: Either the fund established under § 3 of the Housing Production Trust Fund Act of 1988, effective March 16, 1989 (D.C. Law 7-202; D.C. Official Code § 42-2802 (formerly codified at D.C. Code §45-3102 (1996 Repl.))); or an organization that qualifies as a nonprofit organization under § 501(c)(3) of the Internal Revenue Code of 1986, approved October 22, 1986 (68A Stat. 163; 26 U.S.C. § 501 (c)(3)), and that also:
Inclusionary Development : A residential development that is subject to the provisions of Subtitle C, Chapter 10, Inclusionary Zoning, as a Mandatory Inclusionary Development (including an IZ Plus Inclusionary Development) or Voluntary Inclusionary Development, or that is required to comply with the provisions therein by an order of the Zoning Commission or of the Board of Zoning Adjustment, as established by Subtitle C § 1001.2.
Inclusionary Unit: A dwelling unit set aside for sale or rental to eligible households as required by Subtitle C, Chapter 10, Inclusionary Zoning, or as established by an order of the Zoning Commission or of the Board of Zoning Adjustment.
Inclusionary Zoning Act (IZ Act): The Inclusionary Zoning Implementation Amendment Act of 2006, effective March 14, 2007 (D.C. Law 16-275, as amended; D.C. Official Code § 6-1041.01, et seq.). References to the IZ Act include any Mayor's Order, agency rule (including Chapter 22 of the Housing Regulations (Title 14 of the DCMR)), or administrative issuance promulgated pursuant to that legislation.
Inn: A building or part of a building in which habitable rooms or suites are reserved primarily for transient guests who rent the rooms or suites on a daily basis. Guestrooms or suites may include kitchens, but central dining, other than breakfast for guests, is not allowed. The term "inn" may be interpreted to include an establishment known as a bed and breakfast, hostel, or tourist home, but shall not be interpreted to include a hotel, motel, private club, rooming house, boarding house, tenement house, or apartment house. For the purposes of this definition, the limitation on central dining does not prohibit an inn from allowing guests to prepare their meals at centrally located cooking facilities and to eat such meals in a central dining area.
Intermediate Materials Recycling Facility: A structure used for the receipt, separation, storage, conversion, baling, and/or processing of paper, metal, glass, plastics, tires, bulk waste, and other non-biodegradable recyclable materials for the purpose of reutilization of the materials. Such facility shall not include storage or processing of biodegradable materials, construction and demolition debris, white goods, and hazardous substances, as defined by the District of Columbia Environmental Policy Act of 1989, effective October 18, 1989 (D.C. Law 8-36; D.C. Official Code § 8-109.02), and the rules and regulations pursuant thereto. The facility shall be limited in operation to baling, briquetting, crushing, compacting, grinding, shredding, and sorting of acceptable materials. The structure shall be fully enclosed by solid walls, exclusive of doors and windows, and a roof. Doors and windows shall be operative and kept closed except for the coming and going of vehicles and individuals.
International Organization: A public international organization designated as such pursuant to § 288 of the International Organizations Immunities Act, approved December 29, 1995 (59 Stat. 669; 22 U.S.C. §§ 288 - 288f-3), or a public international organization created pursuant to a treaty or other international agreement as an instrument through or by which two or more foreign governments engage in some aspect of their conduct of international affairs, and an official mission (other than a United States mission) to such a public international organization, including any real property of such an organization or mission and including the personnel of such an organization or mission.
Large Format Retail: A single retailer or common retail space with a minimum floor space of fifty thousand square feet (50,000 sq. ft.); the use shall include warehouse club stores with or without paid memberships, discount retailers, and similar uses. A large format retailer may include grocery sales as a secondary use but a grocery store shall not be considered a large format retail use.
Legitimate Theater: A building, or a part of a building, that is designed and used for the presentation of live plays and other forms of dramatic performance. The facility typically has a stage or other performing area plus tiers of seats for the audience, or other arrangements for the audience to sit or stand to view the performance.
Loading berth: An off-street space provided for cargo vehicles, when loading and unloading.
Lot: The land bounded by definite lines that, when occupied or to be occupied by a building or structure and accessory buildings, includes the open spaces required under this title. A lot may or may not be the land so recorded on the records of the Surveyor of the District of Columbia.
Lot Line, Alley: A lot line that abuts an alley.
Lot Line, Street: A lot line that abuts a street.
Lot Lines: The lines bounding a lot as defined in this section.
Lot Occupancy: The percentage of the total area of a lot that is occupied by the total building area of all buildings on the lot.
Lot of Record: A lot recorded on the records of the Surveyor of the District of Columbia.
Lot Width: The distance between the side lot lines, measured along the building line; except that, in the case of an irregularly shaped lot, the width of the lot shall be the average distance between the side lot lines. When the building line is on a skew, the width of the lot shall be the distance between side lot lines perpendicular to the axis of the lot taken where either side lot line intersects the building line.
Lot, Alley: A lot that (i)faces or abuts an alley; (ii) does not face or abut a street at any point, and (iii) is recorded either on the records of the D.C. Surveyor (an "Alley Record Lot") or on the records of the D.C Office of Tax and Revenue (an "Alley Tax Lot").
Lot, Corner: A lot fronting on two (2) or more streets at their junction, with the streets forming with each other an angle of forty- five degrees (45º) up to and including one hundred thirty- five degrees (135º).
Lot, Interior: A lot other than a corner lot or a triangular lot.
Lot, Theoretical: A lot determined by dividing the subdivided into theoretical building sites.
Lot, Through : An interior lot having frontage on two (2) or more streets where the streets differ in direction by forty-five degrees (45º) or less.
Lot, Triangular: A lot fronting on two (2) streets at their junction, the streets, forming with each other an angle of less than forty- five degrees (45º).
Main Floor: The floor of the story in which the principal entrance of a building is located.
Manufacturing, Light: A light production, distribution and repair use where all processing, fabricating, assembly, or disassembly of items takes places wholly within an enclosed building.
Map Amendment: A change to the zoning designation of a lot or lots on the District of Columbia Zoning Map.
Marina: The use of land, buildings, structures, and the surface of water for the provision of docking and storage facilities for boats.
Mass Transit Facilities: Facilities, such as but not limited to stations, trackage, ventilating and electrical equipment, parking lots or structures and bus or automobile transfer areas, that have been determined by the Council of the District of Columbia to be necessary to the operation of a fixed right-of-way mass transit system and subject to the restrictions and conditions as may be imposed by the Council of the District of Columbia. Mass transit facilities shall not include commercial, residential, industrial, or other development located in, on, or over facilities approved as part of the basic operating system.
Material Salvage: The processing for further use of goods, wares, merchandise, substances, articles, or things.
Mayor: The Mayor of the District of Columbia.
Media Studio: A studio space dedicated to the recording or production of audio and/or visual art forms or the broadcast via radio, television, internet or other media of audio and/or visual art forms, or the combination of any of the above.
Median Family Income (MFI): The Median Family Income for a household in the Washington Metropolitan Statistical Area as set forth in the periodic calculation provided by the United States Department of Housing and Urban Development, adjusted for family size without regard to any adjustments made by the United States Department of Housing and Urban Development for the purposes of the programs it administers.
Metrorail Station: Rapid transit station operated by the Washington Metropolitan Area Transit Authority (WMATA).
Mezzanine: A floor space within a story between its floor and the floor or roof next above it and having an area of not more than one-third (1/3) of the area of the floor immediately below and which shares a common ceiling. Except in an RF zone, a mezzanine shall not be considered a story in determining the maximum number of permitted stories. In an RF zone, a mezzanine shall be considered a story in determining the maximum number of permitted stories within a principal structure, but shall not be considered a story in determining the maximum number of permitted stories within an accessory building.
Monopole: A single, self-supporting pole-type structure, supporting a fixture designed to hold one (1) or more antennas. Such structures shall not be deemed ground-mounted antennas as that term is used in this chapter.
Mount: The necessary support structure to which an antenna is attached, not including antenna towers or monopoles.
Multifamily Project: As defined by the Secretary of the U.S. Department of Housing and Urban Development (HUD), means a project which consists of not less than five (5) dwelling units on one (1) site, each such unit providing complete living facilities including provisions for cooking, eating, and sanitation within the unit and which is not now covered by a mortgage insured or held by the Secretary.
Nonconforming Structure : A structure lawfully existing at the time this title or any amendment to this title became effective that does not conform to all provisions of this title or such amendment, other than use, parking, loading, and penthouse or rooftop structure requirements. Regulatory standards that create nonconformity of structures include, but are not limited to, height of building, lot area, width of lot, floor area ratio, lot occupancy, setback, court, and residential recreation space requirements.
Nonconforming Use: Any use of land or of a structure, or of a structure and land in combination, lawfully in existence at the time this title or any amendment to this title became effective that does not conform to the use provisions for the zone in which the use is located. A use lawfully in existence at the time of adoption or amendment of this title that would thereafter require special exception approval from the Board of Zoning Adjustment shall not be deemed a nonconforming use. That nonconforming use shall be considered a conforming use, subject to the further provisions of Subtitle X.
Optical Transmission Node: An interior or exterior facility that is utilized as remote terminal units for the operation of such things as cable television systems, high-speed internet access, and interactive video, not including any broadcast antenna or related towers for the transmission of radio waves.
Organization, Non-Profit: An organization organized, registered with the appropriate authority of government, and operated exclusively for religious, charitable, literary, scientific, community, or educational purposes, or for the prevention of cruelty to children or animals; provided that no part of its net income inures to the benefit of any private shareholder or individual.
Parapet: A vertical extension of a wall of a building above the roof.
Parking Area: The area of a lot, building, or structure devoted to parking spaces, attendant driveways, aisles, queuing lanes, and landscaping. All such areas on a lot shall be considered to constitute a single parking area, even if the areas are not contiguous.
Parking Lot: A tract of land used for the temporary parking of motor vehicles when the use is not accessory to any other use.
Parking Space: An accessible off-street area to be used exclusively for the temporary parking of a motor vehicle subject to the dimensional requirements of Subtitle C, Chapter 7.
Parking Space, Bicycle: A space for the temporary storage of a bicycle in the form of a rack, locker, or storage area of appropriate design and dimension, used exclusively for the storage of a bicycle, subject to the dimensional requirements of Subtitle C, Chapter 8.
Parking Space, Compact: A parking space designed for smaller cars which meets the requirements of Subtitle C.
Parking Space, Shared: A parking space that is made available to more than one (1) use, or to the general public and that meets the requirements of Subtitle C.
Parking Space, Structured: A parking space that is within a building or structure above grade.
Parking Space, Surface: A parking space that is not within a building or structure.
Party: An applicant, or the Advisory Neighborhood Commission for the area within which the property that is the subject of the contested case is located, or any person who is accepted as a party by the Commission pursuant to Subtitle Z, or by the Board of Zoning Adjustment pursuant to Subtitle Y.
Penthouse : A structure that has a roof and is partly to fully enclosed on all sides and is located on or above the roof of any part of a building
Penthouse Habitable Space : A space within a penthouse devoted to any residential or non-residential use permitted in the zone, unless otherwise restricted, other than penthouse mechanical space. The term penthouse habitable space shall include, but not be limited to, residential living space, recreation or amenity space, office, commercial, retail, service, eating or drinking establishment, or other commercial use, and associated facilities such as storage, hallways, stairwells, kitchen space, change rooms, and lavatories.
Penthouse Mechanical Space : A space within a penthouse not devoted to habitable space, including but not limited to mechanical equipment for the building, elevator over-rides, or stair towers.
Permeable Paving: A surface that facilitates water infiltration through paving material while providing a stable, load-bearing surface. Examples include pervious concrete, porous asphalt, perforated brick pavers, flexible porous paving (including porous rubber), mechanically reinforced grass, but do not include grass or gravel.
Pervious Surface: A surface that allows the percolation of water into the underlying soil. Pervious surfaces are required to be contained so neither sediment nor the pervious surface discharges off the site. Pervious surfaces include grass, mulched groundcover, planted areas, vegetated roofs, permeable paving as well as porches and decks erected on pier foundations that maintain the covered lot surface's water permeability. Pervious surfaces do not include any structure or building, any porch or deck that limits the covered lot surface from absorbing water, or any outdoor stairs, on-grade surface sports court, swimming pool, artificial turf, sidewalk or patio constructed of concrete, asphalt, brick, compacted gravel or other material that impedes the infiltration of water directly into the subsurface of the lot.
Pet Grooming Establishment: An establishment that, for a fee, trims or cleans domestic pets, such as dogs and cats. A pet grooming establishment is considered an animal boarding use if more than ten (10) animals are on the premises at a time or the overnight stay of animals is permitted.
Pet Shop: A store for the sale of dogs, cats, birds, tropical fish, and/or other domesticated pets, to the extent permitted by the Animal Protection Amendment Act of 2008, effective December 5, 2008 (D.C. Law 17-281; D.C. Official Code § 8-1808(h)(1)), and related supplies and equipment.
Planned Unit Development (PUD): A plan for the development of residential, institutional, and commercial developments, industrial parks, urban renewal projects, or a combination of these, on land of a minimum area in one (1) or more zones irrespective of restrictions imposed by the general provisions of the Zoning Regulations, as more specifically set forth in Subtitle X, Chapter 3.
Prepared Food: Food that is assembled and heated by microwave, heating lamps or toaster, on the premises of a prepared food shop.
Prepared Food Shop: A food and beverage business that offers seating or carry out service, or both, and which is principally devoted to the sale of prepared food, non-alcoholic beverages, or cold refreshments. This term includes, but is not limited to, an establishment known as a sandwich shop, coffee shop, or an ice cream parlor.
Presiding Officer: The chairperson or the chairperson pro tem of the Zoning Commission or the Board of Zoning Adjustment, as relevant.
Public Library: A facility that falls into one (1) of the following categories:
Public Recreation and Community Center: An area, place, structure, or other facility under the jurisdiction of a public agency that is used for community recreation activities. A public recreation or community center may provide a range of health and wellness, cultural, and arts and crafts activities, and educational classes and services. The center may include, but not be limited to, auditorium, multi-purpose room, gymnasium, meeting space, open space, playground, playing court, playing field, and swimming pool. The center shall not include examination rooms, treatment rooms, or other facilities for regular use by members of the medical or dental professions, but may include a first aid room. Such centers may have pantry-type kitchens with limited food storage and preparation areas, but shall not have kitchen facilities that are of the size customarily used to serve meals for large numbers of persons on a regular basis.
Recreational Building or Use: Any establishment providing facilities for recreation; including, but not limited to, picnicking, boating, fishing, bicycling, tennis, and activities incidental to the foregoing, but not including golf driving ranges or any mechanical amusement device.
Regional Command Center: A Police Department Local Facility used for community outreach or administrative control and managerial services for operations, for a specific geographic area that encompasses two (2) or more districts or commands of the Metropolitan Police Department.
Restaurant: A place of business that does not meet the definition of a "fast food establishment" or "prepared food shop," where food, drinks or refreshments are prepared on the premises and sold to customers primarily for consumption on the premises. This term shall include, but not be limited to, an establishment known as a cafe lunch counter, cafeteria, or other similar business, but shall not include a fast food restaurant. In a restaurant, any facilities for carry out shall be clearly subordinate to the principal use of providing prepared foods for consumption on the premises. A restaurant may include ancillary carry out sales, provided that there is no designated carry out counter or window, no drive through facility, and the carry out service is not an advertised element of the business.
Retaining Wall: A vertical, self-supporting structure constructed of concrete, durable wood, masonry or other materials, designed to resist the lateral displacement of soil or other materials. The term shall include concrete walls, crib and bin walls, reinforced or mechanically stabilized earth systems, anchored walls, soil nail walls, multi-tiered systems, boulter walls, or other retaining structures.
Rooming Unit: One (1) or more habitable rooms forming a single, habitable unit used or intended to be used for living or sleeping purposes; but not for the preparation or eating of meals.
School, Public: A building, structure, or use within a building operated or chartered by the District of Columbia Board of Education or the District of Columbia Public Charter School Board for educational purposes and such other community uses as deemed necessary and desirable.
The term shall include all educational functions, the building or structure required to house them, and all accessory uses normally incidental to a public school, including but not restricted to athletic fields, field houses, gymnasiums, parking lots, greenhouses, playgrounds, stadiums, and open space.
The term also shall include a community-centered school campus; provided, that no part of the building or structure shall be used to house the administrative offices or maintenance and repair shop intended or used for the entire school system, or as a technical or vocational school.
Self-Storage Establishment: A building devoted to the storing of personal property (property other than real property) that:
Service/Delivery Loading Space: An off-street space provided for motor vehicles that are twenty feet (20 ft.) in length or less, and that are making deliveries and/or providing a maintenance service. This space shall not be considered a parking space or a loading berth.
Setback, Front: A distance required between a building and a street lot line, and measured from the street lot line inward to the lot.
Sexually-Oriented Business Establishment: An establishment having as a substantial or significant portion of its stock in trade, books, magazines, and other periodicals, films, materials, and articles, or an establishment that presents as a substantial or significant portion of its activity, live performances, films, or other materials, that are distinguished or characterized by their emphasis on matters depicting, describing, or related to specified sexual activities and specified anatomical areas.
These establishments may include, but are not limited to, bookstores, newsstands, theaters, and amusement enterprises. If an establishment is a sexually-oriented business establishment as defined here, it shall not be deemed to constitute any other use permitted under the authority of this title.
Shed: An accessory building, not used for habitable or automobile purposes, that does not exceed 50 square feet (50 sq. ft.) in area and is less than 10 feet (10 ft.) in overall height.
Short-Term Rental: A use as defined by the Short-Term Rental Regulation Act of 2018 (D.C. Law 22-307), that has a valid Basic Business License from the Department of Consumer and Regulatory Affairs with a "Short-Term Rental" or "Short-Term Rental: Vacation Rental" endorsement.
Specified Anatomical Areas: Parts of the human body as follows:
Specified Sexual Activities: The following activities:
Square: Land designated as a square on the records of the Surveyor of the District of Columbia.
Stable, Private: An accessory building housing not more than four (4) horses or other equine animals for private use and not for remuneration, hire, or sale. The building may also house not more than four (4) horse-drawn vehicles.
Stable, Public: A stable, other than a private stable.
Stealth Structure: A free standing structure, or an extension of a building the primary purpose of which is to enclose and screen antennas from view. Such structures may include, but are not limited to flag poles, tree poles, bell towers. Stealth antenna structures may include, but are not limited to, flag poles, light poles, fence supports, steeples, cupolas, artificial trees, and other appropriate architectural elements.
Story : The space between the surface of two (2) successive floors in a building or between the top floor and the ceiling or underside of the roof framing as measured in accordance with § 310 of this subtitle. For the purpose of determining the maximum number of permitted stories, the term "story" shall not include cellars, penthouses, or rooftop structures.
Story, Top : The uppermost portion of any building or structure that is used for purposes other than penthouses or rooftop structures. The term "top story" shall exclude architectural embellishment, penthouse, or rooftop structure.
Street: A public highway designated as a street, avenue, or road on the records of the Surveyor of the District of Columbia.
Street Frontage: The property line where a lot abuts upon a street. When a lot abuts upon more than one (1) street, the owner shall have the option of selecting which is to be the front for purposes of determining street frontage.
Street, Designated: A street within the boundaries of the D zones whose categorization as Primary, Secondary or Tertiary indicates that a building with frontage on that street must adhere to additional dimensional or use regulations that would not apply to a building in a D zone without frontage on a Designated Street.
Street, Designated Business: For the purpose of administering this title, that portion of the Height Act that designates certain streets as "business streets" shall be interpreted to mean those sides and portions of any street located in an MU, NC, PDR, or D zone, or any zone in Subtitle K.
Streetcar Line: A streetcar or light rail line developed and operated in partnership by the District Department of Transportation (DDOT) and the Washington Metropolitan Area Transit Authority (WMATA).
Structure: Anything constructed, including a building, the use of which requires permanent location on the ground, or anything attached to something having a permanent location on the ground and including, among other things, radio or television towers, reviewing stands, platforms, flag poles, tanks, bins, gas holders, chimneys, bridges, and retaining walls. The term structure shall not include mechanical equipment, but shall include the supports for mechanical equipment. Any combination of commercial occupancies separated in their entirety, erected, or maintained in a single ownership shall be considered as one (1) structure.
Structure, Rooftop: A structure with no roof that is located on or above the roof of any part of a building, including but not limited to, unenclosed mechanical equipment (notwithstanding the definition of "structure"), screening for mechanical equipment, gooseneck exhaust ducts serving kitchen and toilet ventilating systems, roof mounted antennas, solar panels, skylights, roof hatches, trellises (regardless of beam spacing) with unenclosed sides, trash chutes, plumbing vent stacks, rooftop platforms for swimming pools, roof decks, temporary enclosures, and guardrails.
Sustainability: To create and maintain conditions, under which humans and nature can exist in productive harmony, that permit fulfilling the social, economic, and other requirements of present and future generations of District residents.
Substance Abusers Home: A community residence facility that offers a sheltered living arrangement, for one (1) or more individuals diagnosed as abusers of alcohol, drugs, or other controlled substances and as defined and certified under District of Columbia, 22 DCMR, Chapter 63 (2015).
Uptown Center: A multi-purpose major activity center with strong transit orientations and significant concentration of employment and high density residential as the principal elements, developed in a manner that serves the surrounding lower density community while protecting it from avoidable intrusions.
Urban Tree Canopy: The layer of leaves, branches, and stems of trees that cover the ground when viewed from above.
Use: The purpose or activity for which a lot or building is occupied. Use shall be considered as though followed by the words "or intended, arranged, or designed to be used or occupied, offered for occupancy."
Use, Accessory: A use customarily incidental and subordinate to the principal use and located on the same lot with the principal use. Except for Short-Term Rentals and unless otherwise specifically permitted, an accessory use shall be limited to twenty percent (20%) of the gross floor area.
Use, Principal: The primary purpose or activity for which a lot, structure, or building is occupied.
Use, Temporary: Any use which is established for a fixed period of time with the intent that permission for that use will expire automatically unless renewed. The time period of the allowance of the use shall be determined by the certificate of occupancy.
Vegetated Roofs: A horizontal or near-horizontal surface on top of a building or structure covered with vegetation and a growing medium. Vegetated roofs are intended to promote water or energy conservation by using plants and soils to slow, filter, and infiltrate stormwater runoff. Vegetative roofs may be intensive or extensive but are not limited to modular or layered growth systems.
Vegetated Walls: A vertical or near vertical surface covered with vegetation and in some cases, a growing medium. Vegetated walls may include but are not limited to walls or screens with climbing vines, espalier trees, or modular planting systems.
Veterinary Boarding Hospital: A veterinary hospital that boards animals as an independent line of business.
Veterinary Hospital: An establishment used by a licensed veterinarian for the practice of veterinary medicine and not as an animal boarding establishment.
Wall, Lot Line: An enclosing wall constructed immediately adjacent to a side lot line, but not a party wall.
Wall Plate: A horizontal member built into or laid along the top of a wall to support and distribute pressure from joists, rafters, etc.
Warehouse: Any building or premises where goods or chattel are stored. The term "warehouse" shall not include storage clearly incidental to the conduct of a retail business or other permitted use on the premises or Self-storage Establishment
Waterfront: That area proximate to either the Washington Channel or Potomac or Anacostia Rivers. See Subtitle C, Chapter 11.
Window well: A subsurface space adjacent to a building open at the top or protected by a grating or guard that affords access, air, light, or emergency egress to a window.
Yard: An exterior space, other than a court, on the same lot with a building or other structure. A yard required by the provisions of this title shall be open to the sky from the ground up, and shall not be occupied by any building or structure, except as specifically provided in this title. No building or structure shall occupy in excess of fifty percent (50%) of a yard required by this title.
Yard, Front: A yard between the front fate of a building and the front lot line. The front yard when required, shall extend for the full width of the front of the lot.
Yard, Rear: A yard between the rear line of a building or other structure and the rear lot line, except as provided elsewhere in this title. The rear yard shall be for the full width of the lot and shall be unoccupied, except as specifically authorized in this title.
Yard, rear, depth of: The mean horizontal distance between the rear line of a building and the rear lot line, except as provided elsewhere in this title.
Yard, Side: A yard between any portion of a building or other structure and the adjacent side lot line, extending for the full depth of the building or structure.
Youth Rehabilitation Home: A facility providing residential care for one (1) or more individuals less than twenty-one (21) years of age who have been detained or committed by a court under the law of the District or under federal law.
Zone: A geographic area delineated on the Zoning Map, which corresponds to the regulations included in DCMR Title 11.
Zone Boundary Line: The line that forms the perimeter of a zone, as mapped in accordance with this title.
Zoning Act: The Zoning Act of 1938, approved June 20, 1938, as amended (52 Stat. 797, as amended; D.C. Official Code §§ 6-641.01 to 641.15).
Zoning Administrator: The Zoning Administrator of the District of Columbia.
Zoning Commission: The independent quasi-judicial body charged with preparing, adopting and amending the Zoning Regulations and Zoning Map, campus plans, airspace development in public space, and planned unit developments.
D.C. Mun. Regs. tit. 11, r. 11-B100