Across 51 permits filed since 2025-01-25, the median is $10,000; half of projects fall between $7,113 and $28,000. 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
- Remove existing 18 square shingles down to decking, replace with a Tamko Titan architectural shingle system. CSBC2022 CACity of New Haven · 2026-06-30$12,600
- demo existing deck and rebuildCity of New Haven · 2026-06-23$2,800
- Replace railings and decking on back decks (1st, 2nd, and 3rd floor decks), extend 1st floor deck by 10 feet for the current width of the deck (29 feet). This addition/extension, will have stairs recessed into the extended portion of the City of New Haven · 2026-06-05$24,000
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 $7,113 and $28,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.