D.C. Mun. Regs. tit. 11, § 202
202.1 The uses set forth in §§ 202.2 through 202.9 shall be permitted as accessory uses in an R-1 District incidental to the uses permitted in this chapter; provided, that the particular requirements for each use are met.
202.2 The use of an office by a physician or dentist shall be permitted, if the following requirements are met:
202.3 For purposes of § 202.2, the term "physician" shall include only a person who practices medicine.
202.4 [REPEALED].
202.5 The elderly day care home shall be permitted as an accessory use in an R-1 District incidental to the uses permitted in this chapter provided:
202.6 A maximum of two (2) roomers or boarders, who shall room or board in the main building, shall be permitted.202.7 For a one family detached dwelling, in addition to any accessory parking space required by § 2101.1, either of the following is permitted:- (a) One (1) parking space for the exclusive use of the occupants or their guests; or
- (b) Up to two (2) car-sharing spaces, neither of which may be a space devoted to required parking.202.8 Except as is provided in this subsection and § 203.6, no sale of products shall be permitted at a dwelling unit. During a twelve-month (12-month) period, one sale in the nature of a yard sale, garage sale, or home sales party may be held at a dwelling unit.202.9 A home occupation shall be permitted, as provided in and subject to § 203.202.10 An accessory apartment may be added within an existing one-family detached dwelling if approved by the Board of Zoning Adjustment as a special exception under § 3104, subject to the following provisions:- (a) The lot shall have a minimum lot area for the following zone Districts:
- (1) Seven thousand, five hundred square feet (7,500 ft.2) for R-1-A;
- (2) Five thousand square feet (5,000 ft.2) for R-1-B; and
- (3) Four thousand square feet (4,000 ft.2) for R-2 and R-3;
- (b) The house shall have at least two thousand square feet (2,000 ft.2) of gross floor area, exclusive of garage space;
- (c) The accessory apartment unit may not occupy more than twenty-five percent (25%) of the gross floor area of the house;
- (d) The new apartment may be created only through internal conversion of the house, without any additional lot occupancy or gross floor area; garage space may not be converted;
- (e) If an additional entrance to the house is created, it shall not be located on a wall of the house that faces a street;
202.11 Other accessory uses customarily incidental to the uses permitted in R-1 Districts under the provisions of this section, including mechanical amusement machines that are accessory to uses specified in § 210, shall be permitted, subject to the provisions of § 2501.
SOURCE: Final Rulemaking published at 35 DCR 6916 (September 16, 1988); as amended by Final Rulemaking published at 40 DCR 6364 (September 3, 1993); as amended by Final Rulemaking published at 46 DCR 8284, 8286 (October 15, 1999); as amended by Final Rulemaking published at 47 DCR 9741 (December 8, 2000), incorporating by reference the text of Proposed Rulemaking published at 47 DCR 8335, 8345, 8347 (October 20, 2000); as amended by Final Rulemaking and Order No. 09-16 published at 57 DCR 2961 (April 2, 2010); as amended by Final Rulemaking published at 63 DCR 1632 (February 12, 2016).