Across 461 permits filed since 2025-01-25, the median is $17,677; half of projects fall between $8,114 and $45,000. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in Fairfield County, CT actually reported when they pulled permits.
Recent filings
- Remove and replace windows. No structural change. Replacement in-kind like like. ARC approved Jackie 7/24/2026.Town of Greenwich · 2026-07-24$2,829
- Siding and windows (Work previously done).Town of Greenwich · 2026-07-24$20,000
- REPLACEMENT OF (10) DOUBLE-HUNG FULL FRAME, (2) TRIPLE-DOUBLE-HUNG UNIT, (1) AWNING FULL FRAME, (1) DOUBLE-CASEMENT, (1) BAY WINDOW UNIT, (1) BOW WINDOW UNIT, (1) SLIDING PATIO DOOR.Fairfield · 2026-07-24$35,691
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 Fairfield County, CT came in between $8,114 and $45,000. 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
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