D.C. Mun. Regs. tit. 21, § 527
Stormwater Management: Use of Off-site Retention Through the In-lieu Fee or Stormwater Retention Credits
Authority: District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code § 8-151.01 et seq.); the Water Pollution Control Act of 1984, effective March 16, 1985 (D.C. Law 5-188; D.C. Official Code § 8-103.01 et seq.); and Mayor’s Order 2006-61, dated June 14, 2006. Source: Final Rulemaking published at 35 DCR 21 (January 1, 1988); as amended by Final Rulemaking published at 60 DCR 10640 (July 19, 2013); as amended by Final Rulemaking published at 67 DCR 818 (January 31, 2020); as amended by Final Rulemaking published at 72 DCR 012101 (October 31, 2025).District of Columbia, Office of the Secretary
527 STORM WATER MANAGEMENT: EXEMPTIONS
527.1 The following development activities shall be exempt from the provisions of §§526 through 535 of this chapter:
- (a) Minor land disturbing activities such as home gardening and individual home landscaping repairs and maintenance work;
- (b) Single family dwelling utility service connections and construction or utility construction where the excavated material is removed from the job site;
- (c) Tilling, planting, or harvesting of agricultural or horticultural crops;
- (d) Installation of fence and sign posts or poles;
- (e) Emergency work to protect life, list or property, and emergency repairs; Provided, that if the land disturbing activity would have required an approved erosion and sedimentation control plan if the activity were not an emergency, then the land disturbed shall be shaped and stabilized in accordance with the requirements of the Department;
- (f) Additions or modifications to existing single family residential structures, detached garages, sheds, swimming pools or similar improvement;
- (g) Construction or grading operations, or both, that do not disturb more than five thousand square feet (65,000 ft.2) of land area, unless such construction or grading operations shall be part of an approved subdivision plan which contains provisions for storm water management; or
- (h) Residential development consisting of single family dwellings each of which shall be situated on lots of two or more acres;
SOURCE: Final Rulemaking published at 35 DCR 21 (January 1, 1988).