Across 101 permits filed since 2025-04-30, the median is $12,000; half of projects fall between $8,000 and $19,412. 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
- New installation of della mini split 9000 BTUTown of Watertown · 2026-10-28$2,659
- The demolition and reinstallation of 5 water source heat pumps including: ductwork, insulation, registers, grills, transfers, piping, controls and insulation.Town of Watertown · 2026-10-21$111,210
- installation of a Bosch 2-2 ton mini splitTown of Watertown · 2026-10-15$10,000
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 Litchfield County, CT came in between $8,000 and $19,412. 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