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Licensed HVAC contractors in Livermore
55 contractors with a Livermore mailing address hold an active (CLEAR) CSLB C-20 Warm-Air Heating, Ventilating and Air-Conditioning (HVAC) license in CSLB's license file dated Oct 20, 2026. 54 of them show a workers' comp policy on file. Get quotes from up to 3 of them →
Heating and air conditioning work calls for a C-20 license. CSLB requires C-20 licensees to carry workers' compensation even if they have no employees, so check that a policy is on file.
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All 55 licensed HVAC contractors
Order: A–Z by business name (neutral, stated). Showing 1–55. AIR CONCEPTS INC
C-20 · Lic. #839627 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AIR SOLUTIONS LLC
C-20 · Lic. #1161492 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AIRTEKS.COM INC
C-20 · Lic. #930172 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AIS HEATING & AIR CONDITIONING INC
C-20 · also B · Lic. #1098502 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AIS HEATING AND AIR CONDITIONING
C-20 · also B · Lic. #919756 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ALPINE MECHANICAL SERVICE COMPANY INC
C-20 · Lic. #553780 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AMBIENT HEATING AND AIR
C-20 · also C-38 · Lic. #837170 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AWESOME HEATING AND AIR CONDITIONING INC
C-20 · Lic. #813172 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BARKER HEATING & COOLING
C-20 · also B, C-4, C-10, C-36… · Lic. #1043930 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BAY VALLEY HEATING AND AIR CONDITIONING
C-20 · Lic. #838243 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BRADFORD AIR & HEATING
C-20 · Lic. #839474 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CA HEATING AND AIR CONDITIONING
C-20 · Lic. #1099080 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CENTRAL HEATING & AIR CONDITIONING
C-20 · Lic. #825661 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
COHEN AIR CONDITIONING & HEATING
C-20 · Lic. #1105472 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DALE A MILLER
C-20 · also C-10, C-43 · Lic. #516223 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DANIEL MECHANICAL SERVICES
C-20 · Lic. #984060 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DELCON HEATING AND AIR CONDITIONING
C-20 · also C-43 · Lic. #493271 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
EAGLE AIR
C-20 · also C-46 · Lic. #668002 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
EAST BAY HEATING & AIR
C-20 · Lic. #1015658 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
FAULT LINE PLUMBING INC
C-20 · also C-4, C-16, C-36 · Lic. #737079 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
FIVE OR FREE ELECTRICAL SOLUTIONS INC
C-20 · also C-10 · Lic. #1002667 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
HELFRICH REFRIGERATION & MECHANICAL SERVICES LLC
C-20 · also C-38 · Lic. #1047255 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
IRON HORSE HEATING AND COOLING
C-20 · Lic. #1083103 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
J D GENERAL CONSTRUCTION INC
C-20 · also A, B, C-6, C-10… · Lic. #391749 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
KELL MECHANICAL HEATING AND AIR CONDITIONING INC
C-20 · Lic. #993569 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
KEY MECHANICAL COMPANY
C-20 · also C-38 · Lic. #813609 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
KILLEN MECHANICAL INC
C-20 · Lic. #1034453 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
KINETICS MECHANICAL SERVICE INC
C-20 · also B, C-36, C-38 · Lic. #753650 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
LEFT COAST HEATING AND AIR CONDITIONING
C-20 · Lic. #1040611 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
LIVERMORE MECHANICAL INC
C-20 · Lic. #986999 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
M&A MECHANICAL SERVICE LLC
C-20 · also C-43 · Lic. #1141566 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MARINA MECHANICAL SERVICES
C-20 · also C-2, C-4, C-10, C-36… · Lic. #416198 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MATAFIED MECHANICAL
C-20 · Lic. #986098 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MELGAR & ASSOCIATES MECHANICAL INC
C-20 · Lic. #1140422 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
MILLER'S AIR CONDITIONING & HEATING
C-20 · also C-10 · Lic. #253756 · Livermore 94551
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
MOUNTAIN AIR
C-20 · also C-10 · Lic. #630391 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
NATIONAL ENERGY SERVICES INC DBA SOUND HVAC SOLUTIONS
C-20 · Lic. #1092266 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
OK HEATING AND AIR CONDITIONING INC
C-20 · also C-43 · Lic. #332447 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
OMNI MECHANICAL SOLUTIONS
C-20 · also B, C-38 · Lic. #1028951 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
PRIME MECHANICAL SERVICE INC
C-20 · also B, C-4, C-36, C-38 · Lic. #819114 · Livermore 94551
Workers' comp: via leasing/temp firm
✓License Verified CSLB file · Oct 20, 2026
RH MECHANICAL LLC
C-20 · Lic. #1155766 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
RICHARD'S HEATING & AIR REPAIR INC
C-20 · also C-43 · Lic. #883458 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ROBERT JAMES CORTEZ
C-20 · also C-36, C-46 · Lic. #606942 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SELECT MECHANICAL INC
C-20 · Lic. #928189 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SERVICE EXPERTS HEATING & AIR CONDITIONING
C-20 · also C-36 · Lic. #1074641 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SIGNAL HEATING & AIR CONDITIONING
C-20 · Lic. #638992 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SOUTH BAY MECHANICAL
C-20 · also C-36, C-38 · Lic. #627316 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
STREAMLINE POWER
C-20 · also C-10 · Lic. #1007841 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SUPERIOR MECHANICAL SERVICES INC
C-20 · also C-4, C-36 · Lic. #854680 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SWIFT HEATING & AIR
C-20 · Lic. #838919 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
T 3 MECHANICAL INC
C-20 · also C-36 · Lic. #1038631 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
TD MECHANICAL
C-20 · Lic. #1161337 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
VARGAS HVAC
C-20 · Lic. #1145667 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
VARGAS MECHANICAL SERVICES INC
C-20 · Lic. #1077486 · Livermore 94550
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
YOUR ENERGY SOLUTIONS
C-20 · also B, C-10, C-39 · Lic. #928652 · Livermore 94551
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026