HVAC companies in Middletown, MD 21769
3 HVAC companies, with local market data for this ZIP.
General contractors 17HVAC 3Electricians 3Roofing and exteriors 2Excavation and demolition 2Concrete and masonry 1Fences and decks 1
Area profitability, HVAC66 / 100Strong market, crowded field
Typical home value$558,000+0.1% in the past year
New homes permitted, 20251,168Frederick County
Homeowners87.0%4,316 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Advanced Service Air Conditioning & Heating, LLCHVAC contractor · 1929 Mountain Church Rd, Middletown(301) 371-8807 · advancedservicehvac.com
Brake Heating and AirHVAC contractor · 7097 Fern Ln, Middletown(240) 674-4514 · brakeheatingandair.com
Middletown Valley Heating And CoolingHVAC contractor · 3517 Roy Shafer Rd, Middletown(301) 909-5646 · middletownvalleyheatcool.com
HVAC in ZIP 21769 at a glance
Local building angle: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 27% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.