Panel Permits: Gaithersburg vs Rockville
How do panel permits rules compare between Gaithersburg, MD and Rockville, MD?
Rockville has fewer restrictions than Gaithersburg.
Gaithersburg, MD
Montgomery County
Solar panel installation in Gaithersburg requires a building permit and electrical permit. Maryland law under Public Utilities Article 7-603 protects homeowners from unreasonable HOA restrictions on solar installations. The state offers property tax exemptions for residential solar energy systems. Net metering is available through Pepco and other Maryland utilities.
View full Gaithersburg rules →Rockville, MD
Montgomery County
Rockville requires a building permit for residential solar panel installations and offers an expedited automated permitting process through SolarAPP+ for eligible rooftop systems. The program automates plan review and ensures compliance with the 2021 International Residential Code and 2023 National Electrical Code. Projects in historic districts or flood hazard areas are not eligible for automated permitting.
View full Rockville rules →Key Facts Comparison
| Fact | Gaithersburg | Rockville |
|---|---|---|
| Permits Required | Building + electrical | - |
| HOA Protection | MD PUA 7-603 | - |
| Property Tax | Exempt for solar added value | - |
| Net Metering | Available through Pepco | - |
| Building Division | (301) 258-6330 | - |
| Permit Required | - | Yes - automated via SolarAPP+ |
| Code Standards | - | 2021 IRC and 2023 NEC |
| Historic Properties | - | Not eligible for SolarAPP+ |
| MD Tax Exemption | - | Solar systems exempt from property tax |
| Contact | - | 240-314-8247 |
Highlighted rows indicate differences between cities.
Gaithersburg FAQ
Do I need a permit for solar panels in Gaithersburg?
Yes. Both a building permit and electrical permit are required. Apply through the Building Division at (301) 258-6330 with structural and electrical plans.
Can my HOA block my solar panel installation?
Maryland PUA 7-603 prevents HOAs from prohibiting solar installations. Associations cannot impose restrictions that increase cost by more than $1,000 or significantly reduce system efficiency.
What financial incentives are available for solar in Gaithersburg?
Maryland offers property tax exemptions for solar added value, Solar Renewable Energy Credits (SRECs), net metering through Pepco, and Montgomery County Green Bank financing.
Rockville FAQ
How do I get a solar permit in Rockville?
Rockville offers expedited automated permitting through SolarAPP+ for eligible rooftop systems. Licensed contractors submit applications online and permits are issued immediately upon payment if code-compliance checks pass.
Are there tax benefits for solar in Rockville?
Yes. Maryland exempts solar energy systems from property tax increases. Federal investment tax credits and state net metering credits for excess electricity also apply.
Can I install solar panels on a historic property?
Yes, but projects on historic properties are not eligible for the automated SolarAPP+ permitting and must go through the standard permit review process, which may include historic alteration review.
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