D.C. Mun. Regs. tit. 11, r. 11-I102
Unless otherwise noted in this subtitle, the definitions of terms and uses, the rules of measurement, and the categorization of uses are the same as and governed by Subtitles B, C, and U.
If there is a conflict between regulations in this subtitle and regulations in other subtitles regarding the same regulatory topic, this subtitle shall govern.
Unless otherwise stated or as provided in Subtitle I § 102.6, the requirements, restrictions, and incentives of this subtitle apply to all new buildings and to existing buildings where any additions, alterations, or repairs made within a consecutive twelve (12)-month period exceed one hundred percent (100%) of the assessed value of the building as set forth in the records of the Office of Tax and Revenue as of the date of the building permit application.
The cost basis for alterations or additions to an existing building shall be the amount indicated by the applicant on the application for a building permit.
Where there are conflicts between regulations within this subtitle, the stricter regulations apply, except as provided in Subtitle I § 102.6.
A building or structure in existence with a valid Certificate of Occupancy prior to January 1, 2022, may convert existing gross floor area to the "Residential" use category of Subtitle B § 200.2 as a matter-of-right even if the building or structure or portion thereof to be converted does not comply with the following development standards of this subtitle for residential use:
Notwithstanding Subtitle I § 102.6, the requirements for ground floor designated uses of Subtitle I, Chapter 6, Location-Based Regulations for Downtown SubAreas and Designated Street Segments, shall apply.
D.C. Mun. Regs. tit. 11, r. 11-I102