HVAC companies in Mechanicsville, MD 20659
13 HVAC companies, with local market data for this ZIP.
General contractors 36HVAC 13Roofing and exteriors 8Concrete and masonry 6Other construction trades 5Remodeling 4Electricians 4Excavation and demolition 3Painting 3Carpentry, drywall and windows 3Flooring and tile 1Garage doors 1
Area profitability, HVAC45 / 100Moderate market, crowded field
Typical home value$439,000+3.0% in the past year
New homes permitted, 2025282St. Mary's County
Homeowners88.6%8,101 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Aire Care ServiceHVAC contractor · 27165 Harper Woods Way, Mechanicsville(301) 843-1072 · WWW.AIRECARESERVICE.COM
Alliance Heating & Cooling, IncHVAC contractor · 28799 Three Notch Rd, Mechanicsville(301) 843-6674 · allianceheatcool.com
Cliffs Heating & Air ConditioningHVAC contractor · 27763 Baptist Church Rd 101, Mechanicsville(301) 884-8167 · cliffshvac.com · 3 drivers, 1 truck
Ideal AirHVAC contractor · 29211 Three Notch Rd, Mechanicsville(240) 235-3090 · idealairllc.com
JKS Heating & CoolingHVAC contractor · 28984 Dandelion Dr, Mechanicsville(301) 884-4410 · jksheating.com
Johnson Air SystemsHVAC contractor · 27763 Baptist Church Rd Unit 101, Mechanicsville(301) 472-4268 · americanstandardair.com
Modern Aire LLCHVAC contractor · 28967 Three Notch Rd, Mechanicsville(240) 466-3917 · modernairellc.com
Stump's HVACHVAC contractor · 39520 Jarrell Dr, Mechanicsville(301) 848-4622 · stumpshvac.com
Thomas Grove & SonsHVAC contractor · 37713 Browns Way, Mechanicsville(301) 672-4014 · thomasgroveandsons.com
A & S Plumbing and WellHVAC contractor · 28967 Three Notch Rd Ste C, Mechanicsville(301) 472-4148
Grove & Son HvacHVAC contractor · 27010 Mechanicsville Rd, Mechanicsville(240) 538-7074
HeatServ Heating & AirHVAC contractor · 27635 Baptist Church Rd, Mechanicsville(301) 643-5774
M & S Heating & Air LLCHVAC contractor · 26262 Three Notch Rd, Mechanicsville(410) 271-7090
HVAC in ZIP 20659 at a glance
Local building angle: St. Mary's County permitted 282 new homes in 2025, including 10 apartment units. 23% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.