Across 259 permits filed since 2025-01-25, the median is $16,413; half of projects fall between $8,354 and $38,000. 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 New Haven, CT actually reported when they pulled permits.
Recent filings
- 3 SEASON PORCHES Enclose the 6 rear porches on Building 502 with 2x6 walls and windows. Close off existing rear man door and access will be from the existing 5-foot sliding doors. The existing structural frame is to remain. plans are staCity of New Haven · 2026-07-25$36,000
- Siding Replacement: Remove existing siding Secure and prepare any loose wood, install plywood for a nailable surface if needed. Install house wrap (air/moisture barrier) and insulation board. Install starter strip, trim pieces around wCity of New Haven · 2026-07-22$12,712
- Remove and replace 15 windows and 2 doors with .27 u-value replacements all windows meet egress where required. No structural changes CSBC2022 CACity of New Haven · 2026-07-22$43,515
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 Haven, CT came in between $8,354 and $38,000. 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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