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Solar permit requirements by jurisdiction

How long a residential solar permit takes, what it costs and which reviews and inspections it needs — for 320 US building departments. Ballast Solar carries many more inside the app, with adopted codes, fees and the corrections each one sends back.

Source: SolarTRACE, National Renewable Energy Laboratory (NREL), 2025-09-09 release. Times are medians for residential solar in the year shown. Requirements change — confirm current rules, fees and forms with the jurisdiction before you submit.