Suffolk County towns participate in the NY Unified Solar Permit program for residential systems under 25 kW. Permit fees capped at $350 plus PSEG Long Island interconnection approval required. NY-Sun incentives available.
The NY Unified Solar Permit (NY-Sun) standardizes residential solar permitting across participating municipalities. All 10 Suffolk County towns have adopted the Unified Permit. Residential rooftop PV under 25 kW requires a streamlined electrical and building permit, capped at $350 fee statewide. PSEG Long Island must approve interconnection before energization. Solar panels are exempt from property tax assessment for 15 years under NY Real Property Tax Law 487 (unless the town opts out; Brookhaven, Islip, Babylon, Huntington, Smithtown have NOT opted out). HOAs limited in restricting solar under NY RPAPL 335-b.
Unpermitted installs: $250-$1,000 fines and insurance/warranty impact. Interconnection without utility approval violates PSC rules and may result in system disconnection.
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See how Suffolk County's panel permits rules stack up against other locations.
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