HVAC companies in Monrovia, MD 21770
4 HVAC companies, with local market data for this ZIP.
General contractors 12HVAC 4Carpentry, drywall and windows 3Roofing and exteriors 3Electricians 2Other construction trades 2Remodeling 2Painting 1Concrete and masonry 1
Area profitability, HVAC66 / 100Strong market, crowded field
Typical home value$653,000+0.4% in the past year
New homes permitted, 20251,168Frederick County
Homeowners98.8%2,394 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Donald L. Lowe & Sons Inc.HVAC contractor · 4937 Green Valley Rd #H, Monrovia(301) 865-4490 · heatingandairconditioningfrederickmd.com
Eric Smock Heating & Air Conditioning, Inc.HVAC contractor · 3106 Will Mill Ter, Monrovia(240) 745-4461 · ericsmockhvac.com
Montgomery Sheet Metal Fabricator IncHVAC contractor · 3903 Maurice Ct, Monrovia(301) 865-2835 · montgomerysheetmetal.com
James Mettee PlumbingHVAC contractor · Monrovia(301) 831-9626 · 3 drivers, 3 trucks
HVAC in ZIP 21770 at a glance
Local building angle: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 37% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.