Across 1,224 permits filed since 2025-03-03, the median is $18,070; half of projects fall between $10,000 and $40,375. 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 NEW FURNACE AND A/C COIL FOR SECOND FLOOR APARTMENT WITH ALL NEW DUCT WORK LINE SETS, AND FLUE EXHAUST.City of Norwalk · 2026-08-31$7,500
- REPLACE A/C CONDENSER ON RIGHT SIDE OF GARAGECity of Norwalk · 2026-08-31$11,365
- replace existing a/c condenser with 1 Trane, 14 Seer on pad with (1) Trane 2 ton A/R Handler in same locationsTown of Greenwich · 2026-08-31$14,630
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 $40,375. 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