Across 4,194 permits filed since 2025-04-25, the median is $14,700; half of projects fall between $8,000 and $25,000. 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 Connecticut actually reported when they pulled permits.
Recent filings
- Install single head mini-split in living room Your application for a Building Permit has been reviewed for compliance with the 2022 State of Connecticut Building Code. The permit for the proposed work is approved. All work is subjected to Simsbury · 2026-10-23$5,000
- Installation of wall hung mini split systemCity of New Haven · 2026-10-23$5,000
- Install four dual zone mini split systems for new construction apartments or labor and material includedCity of New Haven · 2026-10-23$18,000
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 hvac / central air permits in Connecticut came in between $8,000 and $25,000. 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
HVAC / central air in New JerseyHVAC / central air in New YorkHVAC / central air on Long Island