Across 1,435 permits filed since 2025-04-29, the median is $19,000; half of projects fall between $10,000 and $44,752. 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 Fairfield County, CT actually reported when they pulled permits.
Recent filings
- Install 12000 BTU ductless mini split (Mitsubishi)Town of Weston · 2026-10-28$8,195
- Replace gas supply pipe to four rooftop HVAC units to four separate gas metersCity of Norwalk · 2026-10-28$3,500
- EX POST FACTO: Remove existing residential water heater and install new 50 gal. hybrid water heater in the same location. Reconnect existing hot/cold water piping, temperature and pressure relief valve, discharge piping, and electrical cTown of Bethel · 2026-10-28$2,000
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 Fairfield County, CT came in between $10,000 and $44,752. 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 in ConnecticutHVAC / central air on Long Island