HVAC companies in Islandia, NY 11749
2 HVAC companies, with local market data for this ZIP.
General contractors 14Concrete and masonry 2Fences and decks 2HVAC 2Other construction trades 2Electricians 1Excavation and demolition 1Remodeling 1
Area profitability, HVAC54 / 100Strong market, crowded field
Typical home value$645,000+8.9% in the past year
New homes permitted, 20251,399Suffolk County
Homeowners96.0%1,241 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Associated Energy Services IncHVAC contractor · 86 Bridge Rd, Islandia(631) 348-1021 · associated-energy.com
Reliance Heating and CoolingHVAC contractor · 95 Hoffman Ln, Islandia(631) 787-2600 · rmshvac.com · 8 drivers, 2 trucks
HVAC in ZIP 11749 at a glance
Local building angle: Suffolk County permitted 1,399 new homes in 2025, including 287 apartment units. 8% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.