D.C. Mun. Regs. tit. 29, r. 29-340
For the purposes of this Chapter, "Program Space" is defined as space within the Facility, exclusive of: food preparation areas, kitchens, bathrooms, toilets, offices, staff rooms, corridors, hallways, stairways, closets, lockers, laundry rooms, furnace rooms, file cabinets, storage spaces, and non-movable furniture that is not designed for the use of enrolled children.
Each Facility shall provide adequate indoor space for the daily program of the Facility. The Director shall determine the licensed capacity of each Facility serving infants, toddlers, and/or preschoolers so that there is a minimum of thirty-five square feet (35 ft2) of program space per child. Each such Facility shall maintain a minimum of thirty-five square feet (35 ft2) of program space per child at all times.
The temperature within each room of program space shall be maintained at between sixty-five degrees Fahrenheit (65°F) and seventy-five degrees Fahrenheit (75°F) during the winter months, and between sixty-eight degrees Fahrenheit (68°F) and eighty-two degrees Fahrenheit (82°F) during the summer months.
Each Facility shall provide a separate room, or a separate designated area within a room, for the temporary or ongoing care of a child who needs to be separated from the group due to injury or illness. This room or area shall be located so that any child placed within it is within sight and hearing of the Facility staff at all times, and so that toilet and lavatory facilities are readily accessible. This room or area may be used for other purposes when not needed for such separation of a child.
If a Child Development Center is located in a building that also houses other entities or persons, the portion of the building to which the children from the Facility have access shall be for the exclusive use of children and staff of the Facility during the Facility's hours of operation, with the exception of entryways, hallways, and other common areas in the building normally available for use by the public.
D.C. Mun. Regs. tit. 29, r. 29-340