HVAC companies in Johnston City, IL 62951
1 HVAC companies, with local market data for this ZIP.
General contractors 6Fences and decks 4HVAC 1Remodeling 1Roofing and exteriors 1Other construction trades 1
Area profitability, HVAC22 / 100Soft market, crowded field
Typical home value$110,000−1.2% in the past year
New homes permitted, 2025141Williamson County
Homeowners77.8%2,500 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Coulson's Heating & CoolingHVAC contractor · 1402 Grand Ave, Johnston City(618) 983-8133 · coulsonsheating.com
HVAC in ZIP 62951 at a glance
Local building angle: Williamson County permitted 141 new homes in 2025, including 8 apartment units. 15% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.