Austin-Round Rock-San Marcos, TX · County FIPS code 48491

Licensed HVAC contractors in Williamson County, Texas

In Williamson County, 425 contractors hold a current Texas A/C contractor licence, according to the state registry checked on Oct 14, 2026.

Registry checked on Oct 14, 2026 · How the directory is put together

Call (844) 833-0090Talk to a local HVAC provider about a repair, a replacement or a new system.

The call goes to an independent local provider from a referral network, not to a listed contractor.

Ranch windmill and mesquite near Abilene, Texas

425licences listed

216Class A licences

214Class B licences

Licensed A/C contractors

1431-183 A/C & Heating

Williamson County, Texas

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2 Techs Mechanical Services LLC

Williamson County, Texas

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512 Refrigeration Services LLC

Williamson County, Texas

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Referral line

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One call puts you in touch with an independent local HVAC provider. This is not the number of a contractor listed here.

Call (844) 833-0090

A & G Heating & Air

Williamson County, Texas

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A & TIP Air Conditioning LLC

Williamson County, Texas

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A List Preferred Heating & AC LLC

Williamson County, Texas

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A-TX Express

Williamson County, Texas

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A/C & Heating Technology

Williamson County, Texas

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A/C Nerds

Williamson County, Texas

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Abel's Air Conditioning LLC

Williamson County, Texas

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AC Express LLC

Williamson County, Texas

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AC Pros HVAC LLC

Williamson County, Texas

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ACA Appliance

Williamson County, Texas

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Accurate Heating & Cooling LLC

Williamson County, Texas

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Advanced Refrigeration & Air

Williamson County, Texas

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Air Craft Inc

Williamson County, Texas

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Air Maintenance Company

Williamson County, Texas

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Air Now

Williamson County, Texas

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Air Pro Solutions

Williamson County, Texas

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Air Temp

Williamson County, Texas

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Air Velocity Services

Williamson County, Texas

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Air Wizard HVAC Services, LLC

Williamson County, Texas

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Airangel, LLC

Williamson County, Texas

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Aircare

Williamson County, Texas

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Airco Mechanical Ltd

Williamson County, Texas

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Aire Geeks Inc

Williamson County, Texas

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Aire Serv of Round Rock

Williamson County, Texas

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Airlogic Mechanical Services LLC

Williamson County, Texas

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Airmando A/C Heating

Williamson County, Texas

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Aironx Heating and Cooling LLC

Williamson County, Texas

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Airsential Cooling & Heating LLC

Williamson County, Texas

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Airtex Services

Williamson County, Texas

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Airtron LLC

Williamson County, Texas

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Airworks Air Conditioning & Heating

Williamson County, Texas

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All About Texas Cooling and Heating

Williamson County, Texas

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All Purpose Heating and Air

Williamson County, Texas

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All Seasons Comfort Air LLC

Williamson County, Texas

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All Terrain Heating & Cooling LLC

Williamson County, Texas

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All-Specks Services Inc

Williamson County, Texas

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Aloha AC and Heating LLC

Williamson County, Texas

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Ambient Control Service Company

Williamson County, Texas

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Amplitude Media LLC

Williamson County, Texas

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Amtech Mechanical

Williamson County, Texas

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Angelo John Amador

Williamson County, Texas

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Apollo Home Solutions LLC

Williamson County, Texas

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Referral line

Need HVAC service in Williamson County?

One call puts you in touch with an independent local HVAC provider. This is not the number of a contractor listed here.

Call (844) 833-0090

Appliance Service Group

Williamson County, Texas

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Applied Building Automation

Williamson County, Texas

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AR HVAC Solutions

Williamson County, Texas

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Archer Heating & Air Conditioning LLC

Williamson County, Texas

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Arctic Air Company

Williamson County, Texas

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Arctic Service Company-Glacier Air Inc

Williamson County, Texas

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Arthur's Aire

Williamson County, Texas

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Atlas Mechanical

Williamson County, Texas

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Atomic AC & Heating

Williamson County, Texas

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ATX Mechanical Services LLC

Williamson County, Texas

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Ausco Air

Williamson County, Texas

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Austex Air Conditioning & Heating LLC

Williamson County, Texas

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Austin Advanced AC LLC

Williamson County, Texas

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Austin Air & Ice

Williamson County, Texas

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Austin Airworks

Williamson County, Texas

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Austin Best Quality ENT Inc

Williamson County, Texas

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Austin Climate Control

Williamson County, Texas

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Austin Independent School District

Williamson County, Texas

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Austin Industrial Refrigeration

Williamson County, Texas

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Austin Major Air & Heat

Williamson County, Texas

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Austin Residential & Commercial A/C-Htg

Williamson County, Texas

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Automated Logic

Williamson County, Texas

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Avatt Services Inc

Williamson County, Texas

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B & S Electric

Williamson County, Texas

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BEE Cool Texas Heating & Air

Williamson County, Texas

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Beng Heat & Air

Williamson County, Texas

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Big Horn Heating & Air Conditioning

Williamson County, Texas

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Billy Chapman

Williamson County, Texas

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Bloomquist, Larry J

Williamson County, Texas

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Blue Genie Heating & Air LLC

Williamson County, Texas

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Bluebonnet Backflow

Williamson County, Texas

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Bluebonnet HVAC LLC

Williamson County, Texas

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Bosley Services

Williamson County, Texas

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Bowles Services LLC DBA BR Services

Williamson County, Texas

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Brian Schrock Heating & Cooling

Williamson County, Texas

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Brian Stavely Refrigeration

Williamson County, Texas

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Brother's A/C DBA Capital Air

Williamson County, Texas

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C-4 Air & Heat LLC

Williamson County, Texas

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C2 Mechanical Services,LLC

Williamson County, Texas

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C2 Mechanical Services,LLC

Williamson County, Texas

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C2 Mechanical Services,LLC

Williamson County, Texas

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Capital City Cooling

Williamson County, Texas

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Capital Industries LLC

Williamson County, Texas

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Capital One Enterprises LLC

Williamson County, Texas

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Capitol Air Conditioning Services LLC

Williamson County, Texas

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Capitol Mechanical Services

Williamson County, Texas

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Caribetex HVAC LLC

Williamson County, Texas

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Carrier Corporation

Williamson County, Texas

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Casa Mechanical Services

Williamson County, Texas

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Casa Mechanical Services

Williamson County, Texas

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Casa Mechanical Services

Williamson County, Texas

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Casey's Air Conditioning

Williamson County, Texas

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CCR & Y LLC

Williamson County, Texas

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CDW AC and Heating Services LLC

Williamson County, Texas

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Cedar Park Air Conditioning LLC

Williamson County, Texas

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What homes look like in Williamson County

Owners live in 66% of the 252,323 occupied homes of Williamson County. 50% are heated mainly with electricity and 49% with gas. The median year of construction is 2006.

Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024 (tables B25003, B25035 and B25040).

Heat and cold in Williamson County

112 days a year reach 90°F on average; 28 nights drop to 32°F. The area logs 2,748 cooling degree days against 1,949 heating degree days.

Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, station Georgetown Lake (11 km away).

San Antonio seen from above at dusk

Need HVAC service in Williamson County?

Calls are answered by an independent HVAC provider from a referral network, not by the contractors listed in this directory. The publisher may be paid when a call is connected.

Call (844) 833-0090

Reading a listing

Two things on a listing tell you what the licence allows. The class sets the size of equipment: Class A for any size, Class B for cooling systems of 25 tons and under and heating systems of 1.5 million BTU per hour and under.

The endorsement sets the kind of work. Environmental Air Conditioning is comfort cooling and heating for homes and buildings. The Combined endorsement also covers commercial refrigeration and process cooling or heating.

The county is the one declared on the licence. The state registry holds no street address and no phone number, so neither appears here. Check the licence with TDLR and ask for proof of insurance before you hire.

Counties nearby

Bell County

160 contractors

Travis County

621 contractors

Burnet County

Milam County

Bastrop County

108 contractors

Lee County

Hays County

203 contractors

Coryell County

Call (844) 833-0090Independent local HVAC provider · not a listed contractor