Across 85 permits filed since 2025-03-10, the median is $19,000; half of projects fall between $7,864 and $30,000. 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 Middlesex County, CT actually reported when they pulled permits.
Recent filings
- Replacement of 1 entry door and 10 windows; (bathrooms/tempered and bedrooms) No structural changesHigganum · 2026-09-02$41,000
- Replace some existing windows, trim and sidingTown of Westbrook · 2026-08-26$49,496
- *Removal and replacement of 13 windows (living room, bathroom, bedrooms) - no structural changesTown of Westbrook · 2026-08-26$39,307
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 Middlesex County, CT came in between $7,864 and $30,000. 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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