HVAC companies in Westminster, MD 21158
4 HVAC companies, with local market data for this ZIP.
General contractors 21HVAC 4Concrete and masonry 4Electricians 4Carpentry, drywall and windows 3Other construction trades 3Roofing and exteriors 3Remodeling 2Excavation and demolition 1Painting 1Garage doors 1
Area profitability, HVAC64 / 100Strong market, crowded field
Typical home value$467,000+1.0% in the past year
New homes permitted, 2025153Carroll County
Homeowners79.2%8,370 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Angell Heating and AirHVAC contractor · 446 Uniontown Rd, Westminster(443) 821-7850 · angellairmd.wixsite.com
Comfort Temp Heating & CoolingHVAC contractor · 140 Bachmans Valley Rd, Westminster(410) 876-1797 · comforttemphvac.com
Inside Air Technologies IncHVAC contractor · 265 Kowomu Trl, Westminster(301) 200-1323 · insideairtechnologiesinc.weebly.com
Siegman Forced Air Systems, Inc.HVAC contractor · 1922 Littlestown Pike, Westminster(410) 431-2713 · siegmanhvac.com
HVAC in ZIP 21158 at a glance
Local building angle: Carroll County permitted 153 new homes in 2025. 18% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.