Across 116 permits filed since 2025-03-11, the median is $25,400; half of projects fall between $11,438 and $46,550. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in Nassau County, NY actually reported when they pulled permits.
Recent filings
- Remove and replace nine (9) windows in existing openingsVillage of Garden City · 2026-09-08$11,925
- INSTALLATION OF (3) WINDOWS, (1) DOOR **CONSTRUCTION MATERIAL MUST BE REMOVED BY CONTRACTOR**City of Long Beach · 2026-09-04$21,278
- INSTALLATION OF (1) WINDOW, (2) DOORS **CONSTRUCTION MATERIAL MUST BE REMOVED BY CONTRACTOR**City of Long Beach · 2026-09-04$23,474
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 window replacement permits in Nassau County, NY came in between $11,438 and $46,550. 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
Window replacement in New YorkWindow replacement in ConnecticutWindow replacement on Long Island