Gaithersburg, MD Accessory Structures: Carport Rules (2026)

Gaithersburg regulates carports as accessory structures under the zoning ordinance and building code. A building permit is required for all carport construction. Carports must comply with setback requirements for the zoning district, typically 3 feet from side and rear property lines for detached accessory structures. Attached carports must meet the primary structure setback requirements. In most single-family residential zones, carports are permitted in side and rear yards. Front-yard carports are generally not allowed unless the lot configuration makes side or rear placement impractical and a variance or site plan approval is obtained. Maximum height for detached carports is 15 feet. Structural design must meet wind and snow load requirements per the International Building Code as adopted. Carport roofing must be compatible with the primary dwelling or neighborhood character. The carport footprint counts toward maximum lot coverage calculations. Carports may not enclose more than two sides and remain classified as carports rather than garages. Solar panel installation on carport roofs is permitted with the appropriate electrical permit. Contact the Building Division at (301) 258-6330.