Service Area › Rockland County
Duct Leakage Testing in Clarkstown, NY
Fast scheduling · Signed report on-site · Contractor pricing
Serving Clarkstown HVAC Contractors
Clarkstown is Rockland County's most populous town, encompassing New City, Nanuet, Valley Cottage, and West Nyack — a high-volume residential market with consistent HVAC replacement work and duct testing demand.
Clarkstown covers a large swath of southern Rockland County, with New City as its administrative center. The town's Route 304 and Route 9W corridors are lined with 1960s–1980s residential subdivisions where duct systems are reaching end of life. Nanuet's dense neighborhoods near the Palisades Center have high renovation activity. Valley Cottage and West Nyack offer a mix of older homes and newer construction. The town building department handles a significant HVAC permit volume and consistently enforces energy code duct testing requirements.
Westchester Duct Testing provides residential duct leakage testing for HVAC contractors throughout Rockland County. 40–45 minutes via the Mario Cuomo Bridge. We show up, run the test, and hand you the signed report before we leave.
Clarkstown at a Glance
- Population
- 86,000
- Municipality type
- Town of Clarkstown
- ZIP codes served
- 10956, 10954, 10989, 10994
- Typical housing
- 1960s–1990s colonials and raised ranches in suburban subdivisions
Local Building Department
Town of Clarkstown Building Department
Phone: (845) 639-2050
Duct leakage test report required before CO issuance for all HVAC permits with new ductwork.
Common Projects in Clarkstown
- ✓Full duct system replacement
- ✓Single-zone forced-air retrofit
- ✓Multi-zone HVAC installation
Code Requirements
The 2025 ECCCNYS requires duct leakage testing for all residential duct installations, including retrofits (R503.1.2). Maximum allowable leakage: ≤ 4 CFM per 100 sq ftof conditioned floor area at 25 Pa (≤ 3 CFM/100 sf at rough-in without AHU). Full test process details →
Schedule a Test in Clarkstown
Call to schedule or submit the form online.
We Also Serve Nearby Communities
Duct testing in Clarkstown?
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