Across 245 permits filed since 2025-01-25, the median is $17,000; half of projects fall between $10,000 and $38,000. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners on Long Island actually reported when they pulled permits.
Recent filings
- Construct 4,875 sq. ft. 2 1/2 story replacement dwelling with a 435 sq. ft. 2 car attached garage, 144 sq. ft. front, and 270 sq. ft. rear, roofed over porches, with a 2,176 sq. ft. basement (demolish existing 3,159 sq. ft. 1 ½ story dwelliVillage of Garden City · 2026-07-20$725,000
- SHINGLES ONLY ROOF REPLACEMENTRockville Centre · 2026-07-17$15,000
- ROOF REPLACEMENT IN ACCORDANCE WITH NYS AND RVC CODESRockville Centre · 2026-07-17$30,000
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all roof replacement permits on Long Island came in between $10,000 and $38,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Roof replacement in New JerseyRoof replacement in New YorkRoof replacement in Connecticut