Flat roofs are common across New York — in NYC's five boroughs, older Long Island ranch homes, Hudson Valley commercial-residential buildings, and throughout the urban suburbs. Solar panels work well on flat roofs when installed correctly.
Flat roof solar considerations in NY:
- Ballasted racking: Weighted tilt frames position panels at 10–15° for optimal production without roof penetrations — preferred for EPDM and TPO membranes
- Roof age: Flat roofs should have at least 10 years of remaining life before solar installation. If your membrane is 15+ years old, replace it first — doing so after panels are installed is expensive
- Production: Tilt frames optimize production from south-facing or east/west split arrays. NYC flat roofs often have parapet walls creating partial shade — installers account for this
- Con Ed interconnection: NYC boroughs go through Con Edison with NYC DOB permits — typically an 8–16 week process
- Nassau/Suffolk flat roofs: Ranch homes often have slight pitch; true flat is less common on Long Island but exists in commercial-residential stock
Flat roof solar installs in NYC are more complex and slightly more expensive than suburban pitched-roof installs, but Con Ed's rates make the economics very strong even with the added complexity.