Across 98 permits filed since 2025-04-24, the median is $18,800; half of projects fall between $8,048 and $32,767. 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
- *Install Generac 24KW generator with 200 amp automatic transfer. Generator will be located on right side of garage 5' from windows. Transfer switch will be in basement next to existing main electrical panel. Install new grounding/bonding. ITown of Westbrook · 2026-10-15$16,000
- *Removal and replacement of 3 living room windows - no structural changesTown of Westbrook · 2026-10-15$6,742
- *Removal and replacement of 8 windows (bedrooms) - no structural changesTown of Westbrook · 2026-10-15$27,290
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 $8,048 and $32,767. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
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