1601. ZONE BOUNDARY LINE CROSSING A LOT

ZONE BOUNDARY LINE CROSSING A LOT 1601.1 When a zone boundary line divides a lot that was in single ownership on September 6, 2016, the permitted use and density of a structure located on that lot may be determined as follows: (a) The allowable density for the portion of the lot located in a lesser restrictive use zone may be increased by the density permitted on the portion of the lot located in a more restrictive use zone; provided that no portion of any structure permitted on the lesser restricted portion of the lot shall be extended to the more restrictive portion of the lot; (b) The additional density authorized in this section shall not result in the building exceeding the maximum bulk permitted on the portion of the lot located in the lesser restrictive use zone; (c) For computation of the maximum permitted density for the purposes of this section: (1) Any portion of the lot located in an R-1 or R-2 zone shall be deemed to have a density) of 0.4 FAR; (2) Any portion of the lot located in an R-3 zone shall be deemed to have a density of 0.6 FAR; and (3) Any portion of the lot located in any RF zone shall be deemed to have a density of 0.9 FAR; and (4) Any portion of the lot located in any other zone shall be deemed to have a density as permitted in that zone, including IZ where applicable; and (d) Except for accessory open parking facilities permitted elsewhere in this title, the portion of the lot located in a more restrictive use zone shall be devoted only to required setbacks or courts or other open spaces. 1601.2 For a lot subject to Subtitle C § 1601.1, if approved by the Board of Zoning Adjustment as a special exception pursuant to Subtitle X, Chapter 9 the regulations applicable to that portion of a lot located in a lesser restrictive zone that control the use, and height, and bulk of structures may be extended to that portion of the lot in a more restrictive use zone; provided: (a) The extension shall be limited to that portion of the lot in the more restrictive use zone but not exceeding thirty-five feet (35 ft.); (b) In authorizing an extension, the Board of Zoning Adjustment shall require compliance with Subtitle C § 1601.1(c); (c) The extension shall have no adverse effect upon the present character and future development of the neighborhood; and (d) The Board of Zoning Adjustment may impose requirements pertaining to design, appearance, screening, location of structures, lighting, or any other requirements it deems necessary to protect adjacent or nearby property. 1601.3 For the purpose of interpreting this section, the zones established in this title are listed in the following groups of decreasing use restrictions: R and MU-11 zones; RF, RA, MU-1, MU-2, and D-2 zones; MU-3 through MU-9, MU-15, D-1, D-3 through D-7, NMU zones, and ARTS-1 through ARTS-3 zones; MU-10, MU-12, MU-13, MU-14, MU-15, and ARTS-4 zones; and (e) PDR zones. SOURCE: Final Rulemaking published at 63 DCR 2447, 2712 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 67 DCR 3776 (April 3, 2020); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023); as amended by Final Rulemaking published at 73 DCR 009999 (July 10, 2026). District of Columbia Municipal Regulations Zoning Regulations of 2016: General Rules 11-C DCMR § 1601