Across 216 permits filed since 2025-01-28, the median is $11,208; half of projects fall between $6,602 and $22,273. 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 New London County, CT actually reported when they pulled permits.
Recent filings
- Replace 11 WindowsMontville · 2026-07-29$10,890
- REPLACE INSULATION, REPLACE SHEETROCK - SECOND FLOOR FLOOR REPLACEMENT, PAINT, KITCHEN FLOOR REPLACEMENT, FIRST FLOOR WINDOWS AND TRIM.Town of Waterford · 2026-07-27$21,500
- Removal and replacement of 2 windows (bedrooms) - no structural changesTown of Waterford · 2026-07-22$7,135
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 New London County, CT came in between $6,602 and $22,273. 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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