HVAC companies in Dover, NH 03820
5 HVAC companies, with local market data for this ZIP.
General contractors 26Roofing and exteriors 8Electricians 7Other construction trades 5HVAC 5Excavation and demolition 3Garage doors 3Fences and decks 3Carpentry, drywall and windows 3Concrete and masonry 2Flooring and tile 2Painting 2Remodeling 1
Area profitability, HVAC59 / 100Moderate market, balanced field
Typical home value$541,000+1.6% in the past year
New homes permitted, 2025450Strafford County
Homeowners52.7%15,021 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Garrison City HVACRHVAC contractor · 8 Wilbrod Ave, Dover(603) 686-1132 · gchvacr.com
Gerry's Gas ServiceHVAC contractor · 23 Hillside Dr, Dover(603) 534-9683 · gerrysgasservices.com
Martel Plumbing & Heating IncHVAC contractor · 59 Old Rochester Rd, Dover(603) 742-4141 · martelph.com
Pro HVACHVAC contractor · 32 Crosby Rd, Dover(603) 743-4822 · prohvac1.com
Sid Harvey IndustriesHVAC contractor · 16 Industrial Park Rd, Dover(603) 740-9715 · sidharvey.com
HVAC in ZIP 03820 at a glance
Local building angle: Strafford County permitted 450 new homes in 2025, including 166 apartment units. 20% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.