Across 148 permits filed since 2025-04-27, the median is $18,931; half of projects fall between $8,681 and $141,100. 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
- First floor family room & office/mudroom addition, rebuild front porch, demolish & relocate garage, second floor primary bedroom addition, interior & exterior renovations including new siding and windows.Town of Greenwich · 2026-10-20$800,000
- First floor family room and office/mudroom addition, rebuild front porch, demolish and relocate garage, second floor primary bedroom addition. Interior & exterior renovations including new siding and windows.Town of Greenwich · 2026-10-09$800,000
- Remove and replace 14 windows, same size, like with like. No structural change.Town of Greenwich · 2026-10-08$17,746
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 $8,681 and $141,100. 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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