Gaithersburg, MD Building Setbacks & Zoning: Setback Rules (2026)

The Gaithersburg Zoning Ordinance (Chapter 24 of the Code of Ordinances) establishes minimum setback requirements for all structures. Setbacks vary significantly by zoning district. In standard single-family residential zones (R-A, R-B, R-C), typical front yard setbacks range from 25 to 40 feet, side yard setbacks from 8 to 15 feet, and rear yard setbacks from 25 to 30 feet. Townhouse zones have reduced side setbacks, often 0 feet for attached walls and 10-15 feet at end units. Commercial and mixed-use zones have their own setback requirements, which may be reduced or eliminated for buildings in urban-style development areas. Planned development districts such as Kentlands, Lakelands, and Washingtonian have setbacks established through their approved development plans, which may differ substantially from standard zoning district requirements. These communities were designed with new urbanist or traditional neighborhood development principles that often feature reduced front setbacks and build-to lines rather than minimum setbacks. Accessory structures (sheds, detached garages, pools) typically have reduced setback requirements, often 3 to 5 feet from side and rear property lines. Corner lots may have increased setback requirements on the street-facing side yard. Variances from setback requirements require approval from the Board of Appeals. Contact Gaithersburg Planning and Code Administration at 301-258-6330 for setback requirements specific to your property.