Across 133 permits filed since 2025-03-10, the median is $19,247; half of projects fall between $8,500 and $125,432. 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 Greenwich, CT actually reported when they pulled permits.
Recent filings
- Replace 4 existing windows, ARC approved 9/8/2026.Town of Greenwich · 2026-09-08$15,285
- Amend#2: Window replacements 2 in kitchen and electrical updates (kitchen, gym & outdoor future kitchen).Town of Greenwich · 2026-09-08$5,000
- New siding, new insulation and new windows.Town of Greenwich · 2026-09-02$150,000
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 window replacement permits in Greenwich, CT came in between $8,500 and $125,432. 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
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