HVAC companies in Mount Sinai, NY 11766
2 HVAC companies, with local market data for this ZIP.
General contractors 16Concrete and masonry 5Remodeling 4Roofing and exteriors 3HVAC 2Painting 1Electricians 1
Area profitability, HVAC65 / 100Strong market, crowded field
Typical home value$772,000+6.5% in the past year
New homes permitted, 20251,399Suffolk County
Homeowners92.5%3,863 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
GreenSeal WeatherizationHVAC contractor · 1054 Rte 25A, Mount Sinai(631) 928-1500 · draftbegone.com · 4 drivers, 4 trucks
Technical Heating Co.HVAC contractor · 78 Chestnut St, Mt Sinai(631) 473-1597 · technicalheating.com
HVAC in ZIP 11766 at a glance
Local building angle: Suffolk County permitted 1,399 new homes in 2025, including 287 apartment units. 37% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.