Gaithersburg, MD Solar Energy: Panel Permits (2026)

Gaithersburg requires both a building permit and an electrical permit for residential solar panel installations. Applications are submitted through the Building Division at (301) 258-6330. Rooftop systems must meet structural requirements demonstrating the roof can support the additional weight. Ground-mounted systems must comply with accessory structure setback requirements and height limits. Fire code requires clear access pathways on roofs for firefighter safety, typically 3-foot setbacks from roof edges and ridges. Electrical work must comply with the National Electrical Code and be performed by a licensed electrician. Maryland Public Utilities Article 7-603 (MD PUA 7-603) restricts HOA and community associations from prohibiting solar installations and limits restrictions that would increase cost by more than $1,000 or significantly reduce efficiency. Maryland offers a property tax exemption for the added value of residential solar energy systems. The state Solar Renewable Energy Credit (SREC) program provides additional financial incentives. Net metering is available through Pepco, the primary electric utility serving Gaithersburg, allowing homeowners to receive credit for excess electricity generated. Montgomery County also offers the Green Bank financing program for solar installations. Contact the Building Division for current permit fees and plan requirements.