Across 105 permits filed since 2025-01-25, the median is $13,250; half of projects fall between $7,834 and $19,000. 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 Litchfield County, CT actually reported when they pulled permits.
Recent filings
- 5 Replacement windows with Wincore Series 5400 - 3 double sliding and two tempered glass windows by the front doorTown of Watertown · 2026-07-20$8,000
- Installation of 20 Vinyl Replacement Windows No change of use. Replacing existing vinyl Windows. U-Value .26Town of Watertown · 2026-07-15$18,580
- Replace 2 bay windows with no structural changes. U-factor: 0.26Town of Watertown · 2026-07-14$22,625
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 Litchfield County, CT came in between $7,834 and $19,000. 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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