Across 542 permits filed since 2025-01-25, the median is $14,760; half of projects fall between $7,019 and $25,000. 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 Hartford County, CT actually reported when they pulled permits.
Recent filings
- Removing existing breezeway double casement window. Installing a new construction 2-lite slider.Town of Granby · 2026-07-24$2,140
- ****MIKE IS WORKING ON THIS*************** Installing 10kw Generac generator with fully automatic transfer switch with small sub panel for basic electrical needs. Generator will be set directly behind house 5ft from any window and on compoTown of Southington · 2026-07-23$8,200
- REMOVE AND REPLACE 4 WINDOWS. LIKE SIZES AND NO STRUCTURAL CHANGES. Your application for a Building Permit has been reviewed for compliance with the 2022 State of Connecticut Building Code. The permit for the proposed work is approved. AllSimsburyTownCT · 2026-07-21$4,674
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 Hartford County, CT came in between $7,019 and $25,000. 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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