HVAC companies in Jefferson, MD 21755
4 HVAC companies, with local market data for this ZIP.
General contractors 11HVAC 4Roofing and exteriors 2Other construction trades 2Flooring and tile 1Electricians 1Concrete and masonry 1
Area profitability, HVAC62 / 100Strong market, crowded field
Typical home value$560,000−0.2% in the past year
New homes permitted, 20251,168Frederick County
Homeowners86.6%2,106 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
ACR ServicesHVAC contractor · 4014 Mountville Rd, Jefferson(301) 620-9400 · coolingfrederick.com
Frederick Heating & Air ConditioningHVAC contractor · 4801 Broad Run Rd, Jefferson(240) 674-0814 · frederickheatingandac.com
Mason Mechanical Services LLCHVAC contractor · 4538 Timbery Dr, Jefferson(571) 233-2585 · mmshvacr.com · 2 drivers, 2 trucks
Real Comfort Systems Heating and CoolingHVAC contractor · 3886 Roundtree Rd Unit 1, Jefferson(301) 662-3661 · realcomfortsystems.com
HVAC in ZIP 21755 at a glance
Local building angle: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 19% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.