D.C. Mun. Regs. tit. 11-D, § 5003
Maximum Building Area
Effective Sep 5, 202572 DCR 009494Authority: § 1 of the Zoning Act of 1938, approved June 20, 1938 (52 Stat. 797), as amended; D.C. Official Code § 6-641.01 (2018 Rep1.), 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 68 DCR 2908 (March 19, 2021); as amended by Final Rulemaking published at 72 DCR 009494 (September 5, 2025).District of Columbia, Office of the Secretary
Subtitle A
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Chapter 3
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Chapter 4
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Chapter 5
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Chapter 6
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5003 MAXIMUM BUILDING AREA
5003.1 The maximum building area for an accessory building in an R zone shall be an area equal to the greater of thirty percent (thirty percent (30%)) of the required rear yard or four hundred and fifty square feet (450 sq. ft.).
SOURCE: Final Rulemaking published at 63 DCR 2447, 2834 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 68 DCR 2908 (March 19, 2021); as amended by Final Rulemaking published at 72 DCR 009494 (September 5, 2025).