Across 82 permits filed since 2025-01-25, the median is $12,000; half of projects fall between $7,850 and $17,398. 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 Litchfield County, CT actually reported when they pulled permits.
Recent filings
- Installation off a heil 2.5 ton air handler with back up 10kw heat strip with a 2.5 ton heil 15 seer heat pump condenser. Doing all gas piping to fireplace and kitchen stove.Town of Watertown · 2026-07-22$12,000
- Removal of old Hvac equipment and disposal. Install of a gas furnace and evaporator coil. Modification on duct workTown of Watertown · 2026-07-16$16,500
- Installing two Mini Split systems with a condenserTown of Watertown · 2026-07-16$1,800
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 Litchfield County, CT came in between $7,850 and $17,398. 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