HVAC companies in Round Rock, TX 78665
5 HVAC companies, with local market data for this ZIP.
General contractors 28Roofing and exteriors 13Garage doors 7HVAC 5Remodeling 4Carpentry, drywall and windows 3Other construction trades 3Painting 2Electricians 2Excavation and demolition 1Fences and decks 1Flooring and tile 1Concrete and masonry 1
Area profitability, HVAC77 / 100Strong market, balanced field
Typical home value$390,000−6.1% in the past year
New homes permitted, 20254,956Williamson County
Homeowners61.4%23,318 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
1431 A/C & HeatingHVAC contractor · 3406 Nocona Cv, Round Rock(512) 336-1431 · 1431ac.com
Blue Ribbon Cooling & HeatingHVAC contractor · 3121 Eagles Nest St Unit 150, Round Rock(512) 308-3515 · blueribbonservices.com
Casa Mechanical ServicesHVAC contractor · 2401 E Old Settlers Blvd, Round Rock(512) 334-7300 · casamechanical.com · 3 drivers, 4 trucks
Clean Air Clean HomeHVAC contractor · 1101 Satellite Vw, Round Rock(512) 213-0380 · hyla-us.com
Round Rock Air Conditioning RepairHVAC contractor · 2200 N A W Grimes Blvd, Round Rock(737) 345-4810 · roundrockairconditioningrepair.com
HVAC in ZIP 78665 at a glance
Local building angle: Williamson County permitted 4,956 new homes in 2025, including 996 apartment units. 85% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.