HVAC companies in Gaithersburg, MD 20879
17 HVAC companies, with local market data for this ZIP.
General contractors 68Electricians 18HVAC 17Roofing and exteriors 8Remodeling 7Carpentry, drywall and windows 6Concrete and masonry 6Painting 4Other construction trades 4Excavation and demolition 3Flooring and tile 3Garage doors 3Fences and decks 2
Area profitability, HVAC56 / 100Strong market, crowded field
Typical home value$433,000−1.6% in the past year
New homes permitted, 20251,411Montgomery County
Homeowners69.8%8,850 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Bilmin Company, IncHVAC contractor · 7411 Lindbergh Dr, Gaithersburg(301) 948-9040 · bilminhvac.net · 3 drivers, 3 trucks
Densel CompanyHVAC contractor · 7640 Airpark Rd Ste A, Gaithersburg(301) 670-0970 · densel.com · 3 drivers, 3 trucks
Diversified HVAC ServicesHVAC contractor · 7615 Rickenbacker Dr, Gaithersburg(301) 417-9772 · diversifiedhvac.com · 2 drivers, 1 truck
Germantown Heating And Air ConditioningHVAC contractor · 7634 Airpark Rd, Gaithersburg(301) 926-4407 · germantownheatingandac.com
J&K Air ConditioningHVAC contractor · 18775 N Frederick Ave, Gaithersburg(301) 990-0780 · jkhvac.com
James A. Wheat and SonsHVAC contractor · 7834 Beechcraft Ave, Gaithersburg(301) 241-9636 · wheatandsons.com
KW Mechanical LLCHVAC contractor · 30 Cessna Ct, Gaithersburg(301) 257-3422 · kwmechanicalhvac.com
Mannix Heating & CoolingHVAC contractor · 7824 Beechcraft Ave, Gaithersburg(301) 260-6000 · mannixhvac.com
Mario Bro Heating and CoolingHVAC contractor · 18745 Blue Violet Ln, Gaithersburg(301) 325-6018 · mariobrohvac.com
Michael Bonsby HVAC and PlumbingHVAC contractor · 7950 Cessna Ave, Gaithersburg(301) 990-7970 · michaelbonsbyhvac.com · 4 drivers, 1 truck
Parker Pearce Service ExpertsHVAC contractor · 7901 Beechcraft Ave Ste C, Gaithersburg(301) 548-9000 · parkerpearce.com
Presidential Heating & Air Conditioning - Southern HVACHVAC contractor · 8000 Cessna Ave, Gaithersburg(301) 719-3315 · presidentialheatandair.com
Simply Home ServiceHVAC contractor · 9326 Taverney Terr, Gaithersburg(301) 518-9977 · simplyhomeservices.com
United Service SpecialistsHVAC contractor · 7559 Rickenbacker Dr Ste A, Gaithersburg(301) 924-3500 · unitedservicespecialists.com
Enviro Aire Mechanical ServicesHVAC contractor · 7924 Queenair Dr, Gaithersburg(301) 340-6050
HVAC Precision Services IncHVAC contractor · 7610 Lindbergh Dr, Gaithersburg(301) 921-9300 · 1 driver, 3 trucks
LP Heating & AC Co IncHVAC contractor · Gaithersburg(301) 921-9454 · 5 drivers, 1 truck
HVAC in ZIP 20879 at a glance
Local building angle: Montgomery County permitted 1,411 new homes in 2025, including 559 apartment units. 14% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.