HVAC companies in San Marcos, TX 78666
13 HVAC companies, with local market data for this ZIP.
General contractors 72Roofing and exteriors 26HVAC 13Other construction trades 8Painting 7Remodeling 5Electricians 5Excavation and demolition 5Carpentry, drywall and windows 4Concrete and masonry 3Fences and decks 3Garage doors 2
Area profitability, HVAC55 / 100Moderate market, balanced field
Typical home value$309,000−2.9% in the past year
New homes permitted, 20254,595Hays County
Homeowners38.1%33,836 households
Source: Zillow (home value and housing demand in the score), data through Sep 2026. Permits and households: U.S. Census Bureau.
Air Care TodayHVAC contractor · 4730 N TX-123, San Marcos(512) 333-1135 · aircaretoday.com
AirOne Heating & Air ConditioningHVAC contractor · 4105 Hunter Rd Ste 11, San Marcos(512) 392-0022 · myairone.com
Century Hvac DistributingHVAC contractor · 1551 Clovis R Barker Rd Ste 201, San Marcos(512) 392-1114 · centuryhvac.com
Comfy AirHVAC contractor · 5040 N TX-123, San Marcos(512) 883-2626 · comfyairtx.com
Comfy AirHVAC contractor · 5040 SH 123 Bldg #200 Ste 2, San Marcos(830) 965-8534 · comfyairtx.com
Competition A/C & Heat LLCHVAC contractor · 115 Barton Rd, San Marcos(512) 392-2697 · competitionac.com
Fast AC & HeatingHVAC contractor · 1000 Beback Inn Road, San Marcos(512) 216-1380 · acprofix.com
Goodman Distribution Inc.HVAC contractor · 1600 Clovis Barker Rd Ste 301, San Marcos(512) 392-6939 · goodmanmfg.com
Marvin's Heating & Air ConditioningHVAC contractor · 102 Manor Park Rd, San Marcos(512) 396-4791 · marvinsac.com
Quality HVAC & RefrigerationHVAC contractor · 105 Picasso Dr, San Marcos(512) 738-0081 · smqhr.com
Reliable AirHVAC contractor · 4702 N State Highway 123, San Marcos(512) 580-8837 · reliableairtx.com
Woods Comfort SystemsHVAC contractor · 4105 Hunter Rd Ste 20, San Marcos(512) 392-6907 · woodscomfortsystems.com
Fast AC & HeatingHVAC contractor · 109 Ridge Dr, San Marcos(281) 851-9100
Finch Mechanical ContractorsHVAC contractor · 138 S LBJ Dr, San Marcos(512) 396-1717
HVAC in ZIP 78666 at a glance
Local building angle: Hays County permitted 4,595 new homes in 2025, including 436 apartment units. 46% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.