D.C. Mun. Regs. tit. 11-U, § 301
301
301.1 The following uses shall be permitted as a matter-of-right in an RF zone subject to any applicable conditions:
(a) Any use permitted in the R zones under Subtitle U §§ 201 and 202;
(b) Residential uses with a maximum number of principal dwelling units per lot as follows:
TABLE U § 301.1(b); MAXIMUM NUMBER OF PRINCIPAL DWELLING UNITS
| Zones | Number of Principal Dwelling Units |
|---|---|
| RF-1 | 2 |
| RF-4 | 3 |
| RF-5 | 4 |
(c) A permitted principal dwelling unit within an accessory building subject to the following conditions:
(1) The accessory building was in existence on January 1, 2013;
(2) No expansion or addition may be made to the accessory building to accommodate an apartment except as a special exception;
(3) There shall be permanent access to the accessory building dwelling from a dedicated and improved right of way; and
(4) Permanent access shall be provided by one (1) of the following:
(A) An easement for a permanent passage, open to the sky, no narrower than eight feet (8 ft.) in width, and extending from the accessory building to a public street through a side setback recorded in the land records of the District of Columbia;
(B) Through an improved public alley with a minimum width of twenty-four feet (24 ft.) that connects to a public street; or
(C) On an improved alley no less than fifteen feet (15 ft.) in width and within a distance of three hundred (300) linear feet of a public street;
(d) An accessory building that houses a principal dwelling unit shall not have a
roof deck;
(l) Medical care uses;
(m) A multiple dwelling in Squares 2580, 2581, 2582, 2583, 2584, 2586W, 2587, 2589, in existence as of December 14, 2015, with a valid certificate of occupancy, or a building permit application that was officially accepted by DCRA as being complete prior to December 14, 2015, provided that the multiple dwelling shall not be expanded in gross floor area, lot occupancy, number of stories, building height, penthouse or rooftop structure height, or number of units. Said multiple dwelling, however, may be repaired, renovated, remodeled, or structurally altered;
(n) Child/elderly development center located in a building that was built as a place of worship and that has been used continuously as a place of worship since it was built; and
(o) Child/elderly development center or adult day treatment facility, provided, that the use shall be limited to no more than sixteen (16) individuals, not including staff; and
(p) Youth Residential Care Home for not more than six (6) persons not including resident supervisors or staff and their families. The facility may accommodate seven (7) to eight (8) persons, not including resident supervisors or staff and their families, provided there shall be no property containing an existing youth residential care home for eight (8) or more persons within a radius of five hundred feet (500 ft.) from, any portion of the subject property.
301.2 The conversion of an existing non-residential building or structure to an apartment house shall be permitted as a matter of right in an RF-1, RF-2, or RF-3 zone subject to the following conditions:
(a) The building or structure to be converted is in existence on the property at the time the building permit application for the conversion is accepted as complete by the Department of Consumer and Regulatory Affairs; and
(b) There shall be a minimum of nine hundred square feet (900 sq. ft.) of land area per each existing and new dwelling unit.
301.3 An apartment house in any of the RF-1 zones converted from a non-residential building prior to June 26, 2015, shall be considered a conforming use and structure, but shall not be permitted to expand, either structurally or through increasing the number of units, except as provided by Subtitle U § 320.4.
301.4 An apartment house in any of the RF-1 zones that was converted from a residential building either prior to June 26, 2015, or pursuant to Subtitle A §§ 301.9, 301.10, or 301.11, shall be considered a conforming use and structure, but shall not be permitted to expand, either structurally or through increasing the number of units, except as provided by Subtitle U § 320.2.
301.5 An apartment house in any of the RF-1 zones that was constructed as an apartment house prior to May 12, 1958, or that was lawfully constructed as an apartment house prior to August 7, 1981, in compliance with the then-applicable zoning regulations, shall be considered a conforming use and may renovate or expand in conformance with the applicable provisions of this title, provided that:
(a) The apartment house has not been expanded pursuant to a special exception approved by the Board of Zoning Adjustment per Subtitle U §§ 301.4, 320.2, or 320.4;
(b) An apartment house with less than nine hundred square feet (900 sq. ft.) of lot area per existing dwelling unit does not increase the number of dwelling units; and
(c) An apartment house with more than nine hundred square feet (900 sq. ft.) of lot area per existing dwelling unit may only add additional dwelling units if the apartment house has a minimum of nine hundred square feet (900 sq. ft.) of lot area for each existing and new dwelling unit.
SOURCE: Final Rulemaking published at 63 DCR 2447, 3338 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 63 DCR 12366 (October 7, 2016); as amended by Final Rulemaking published at 64 DCR 4055 (April 28, 2017); as amended by Final Rulemaking published at 64 DCR 6117 (June 30, 2017); as amended by Final Rulemaking published at 64 DCR 8416 (August 25, 2017); as amended by Final Rulemaking published at 65 DCR 6596 (June 15, 2018); as amended by Final Rulemaking published at 67 DCR 13346 (November 13, 2020); as amended by Final Rulemaking published at 68 DCR 3551 (April 2, 2021); as amended by Final Rulemaking published at 68 DCR 013834 (December 24, 2021); as amended by Final Rulemaking published at 69 DCR 012886 (October 21, 2022); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023).