2 county-level rules, plus city-specific rules for 1 city in District of Columbia, District of Columbia.
Verified from official government sources
Rooftop solar in DC requires a Department of Buildings permit for structural and electrical work under DC Construction Codes (DCMR 12-A et seq., based on 2017 IRC/IBC). DC offers expedited SolarPlus residential review, typically 10 business days. The Solar for All program and the Renewable Portfolio Standard Act incentivize installation, and net metering is available through Pepco.
DC's Solar Rights Act (DC Code section 6-1451.04) prohibits condo associations and HOAs from banning solar collectors on limited common elements appurtenant to a unit and requires approval of reasonable installations. Associations may impose reasonable aesthetic conditions but cannot significantly reduce system efficiency or increase cost. Historic district HPRB rules still apply.
1 cities in District of Columbia have their own solar energy rules. Each link goes to that city's dedicated page with code citations.
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