Building Setbacks & Zoning in Gaithersburg, MD (2026)
3 verified building setbacks & zoning rules for Gaithersburg, Maryland, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
Gaithersburg's residential zoning tables set minimum front, side and rear setbacks by district: 30/15/30 feet in the low-density R-A zone, tightening to 20/5/20 feet in the medium-density R-90 zone.
Gaithersburg Zoning Yard Setback Minimums
Some RestrictionsGaithersburg City Code §§ 24-3.2, 24-3.3
Table 24-3.2-1. ... R-A Zone Dimensional Standards ... Front setback (min.) 30 feet Side setback (min.) 15 feet Rear setback (min.) 30 feet ... Table 24-3.3-1. ... R-90 Zone Dimensional Standards ... Front setback (min.) 20 feet Side setback (min.) 5 feet Rear setback (min.) 20 feet
Structure Height Limits
Gaithersburg caps residential buildings at 3 stories and 38 feet across its R-A, R-90, R-6, RB and R-20 detached-home standards, while townhouse and multifamily forms in denser zones may rise to 4-6 stories.
Gaithersburg Residential Building Height Limits
Some RestrictionsGaithersburg City Code §§ 24-3.2, 24-3.3
Table 24-3.2-1. ... R-A Zone Dimensional Standards ... Building height (max.) Residential: 3 stories and 38 feet Non-residential: No limit ... Table 24-3.3-1. ... R-90 Zone Dimensional Standards ... Building height (max.) Residential: 3 stories and 38 feet Non-residential: 45 feet
Lot Coverage Limits
Gaithersburg zoning caps impervious and building lot coverage by district. The low-density R-A zone allows 50% impervious and 35% building coverage, while the medium-density R-90 zone allows 70% impervious and 50% building coverage.
Gaithersburg Zoning Lot Coverage Limits
Some RestrictionsGaithersburg City Code §§ 24-3.2, 24-3.3
Table 24-3.2-1. ... R-A Zone Dimensional Standards ... Impervious lot coverage (max.) (1) 50% Building lot coverage (max.) (2) 35% Front yard impervious coverage (max.) (1) 35% Table notes: (1) This provision only applies to single-family detached and duplex dwellings. (2) This provision shall apply only to single-family detached or duplex, public, and non-residential uses. ... Table 24-3.3-1. ...
Looking for Montgomery County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Gaithersburg city rules.
Building Setbacks & Zoning in Montgomery County →