Across 669 permits filed since 2025-05-09, the median is $9,348; half of projects fall between $5,000 and $16,018. 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 gas piping to fix leaks for first floor and put on pressure test and install new gas water heaterCity of New Haven · 2026-11-06$3,200
- We will be installing a new stainless steel chimney liner for the existing gas boiler and water heater as well as installing a new Regency i1150 wood insert with a new stainless steel chimney liner. We will also be rebuilding the side chimnCity of New Haven · 2026-11-06$13,815
- Connect hoses to from temporary boiler connection from temp boiler truck(provided by others) to heat exchanger in mechanical room. Supplying boiler truck for 5 million BTU cleaver brooks.City of New Haven · 2026-11-06$32,000
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 boiler / water heater permits in New Haven, CT came in between $5,000 and $16,018. 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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