D.C. Mun. Regs. tit. 11-D, § 300
Purpose and Intent
Effective Aug 25, 202370 DCR 011297Authority: § 1 of the Zoning Act of 1938, approved June 20, 1938 (52 Stat. 797), as amended; D.C. Official Code § 6-641.01 (2018 Repl.), and pursuant to § 6 of the District of Columbia Administrative Procedure Act, approved October 21, 1968 (82 Stat. 1206; D.C. Official Code § 2 505(c) (2016 Repl.)). Source: Final Rulemaking published at 63 DCR 2447, 2834 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023).District of Columbia, Office of the Secretary
Subtitle A
Chapter 1
Chapter 2
Chapter 3
300
300.1 The base zone development standards in Subtitle D, Chapter 2 shall apply to the R-1A/TS and R-1B/TS zones except as specifically modified by this chapter. In the event of a conflict between the provisions of this chapter and other regulations of this title, the provisions of this chapter shall control.
300.2 In addition to the purposes of the R-1 zones, the purposes of the Tree and Slope Protection Residential House (R-1A/TS and R-1B/TS) zones are to:
- (a) Preserve and enhance the park-like setting of designated neighborhoods adjacent to streams or parks by regulating alteration or disturbance of terrain, destruction of trees, and ground coverage of permitted buildings and other impervious surfaces
- (b) Preserve the natural topography and mature trees to the maximum extent feasible in a residential neighborhood;
- (c) Prevent significant adverse impact on adjacent open space, parkland, stream beds, or other environmentally sensitive natural areas; and
- (d) Limit permitted ground coverage of new and expanded buildings and other construction, so as to encourage a general compatibility between the siting of new buildings and the existing neighborhood.
300.3 The R-1A/TS and R-1B/TS zones shall be mapped in residential neighborhoods that are located at the edge of stream beds or public open spaces and that have a significant quantity of steep slopes, stands of mature trees, and undeveloped lots and parcels subject to potential terrain alteration and tree
removal. It is not suitable for mapping in neighborhoods where nearly all lots are already developed on a rectangular grid system and the existing mature trees are either yard trees or street trees.
SOURCE: Final Rulemaking published at 63 DCR 2447, 2834 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023).