Across 64 permits filed since 2025-03-09, the median is $9,600; half of projects fall between $6,507 and $18,500. 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
- Replace existing deck VERIFY FOOTINGS MIN 42" DEPTH CHANGE COST TO $9300 PENDING PAYMENT OF REVISED ESTIMATE CA 1 FAMILY C0# 96-014 2/1/96City of New Haven · 2026-09-03$9,300
- Hot tub (permit application 1719425 for hot tub) - new 50 amp breaker off of existing wiring and install disconnect. Also, reinstall recessed lights that were removed for the deck remodel (permit B-26-01008), install fan on deck ceiling, iCity of New Haven · 2026-09-01$2,000
- Repairs to front and back decks. REPAIRS ONLY , SAME SIZE SAME SHAPE , CLOSE OFF DOOR AT SECOND FLOOR DECK WHERE REMOVED CACity of New Haven · 2026-08-21$2,500
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 deck permits in New Haven, CT came in between $6,507 and $18,500. 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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