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Licensed HVAC contractors in San Marcos
20 contractors with a San Marcos 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. 20 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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Ad space · openAdvertise here
A Featured spot on this hvac page for San Marcos is a paid ad for a License Verified contractor, labeled "Ad" every time. It sits apart from the directory and never changes the order below. From $49/mo. Join the waitlist →
All 20 licensed HVAC contractors
Order: A–Z by business name (neutral, stated). Showing 1–20. ACE CONTRACTORS
C-20 · also B, C-36 · Lic. #175404 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ACTION AIR CONDITIONING AND HEATING
C-20 · Lic. #1083840 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ACUNA'S POLAR AIRE
C-20 · Lic. #352974 · San Marcos 92069
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
AIRWAVE MECHANICAL INC
C-20 · Lic. #996826 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ALTERED AIR
C-20 · also C-38 · Lic. #531080 · San Marcos 92079
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ALVE MECHANICAL
C-20 · Lic. #935043 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AMERICAN HVAC TECHNOLOGY
C-20 · Lic. #1149594 · San Marcos 92079
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ANTHONY MOORE CONSTRUCTION
C-20 · also B, C-36 · Lic. #776126 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BETTER AIR SYSTEMS
C-20 · Lic. #977738 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
C H C REFRIGERATION INC
C-20 · also C-38 · Lic. #964103 · San Marcos 92079
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CHAMPION AIR CONDITIONING & HEATING
C-20 · Lic. #960920 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DR HVAC LLC
C-20 · Lic. #1157724 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
EXCEL AIR CO
C-20 · Lic. #781259 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
GREEN BUILDING TEST & BALANCE CO
C-20 · Lic. #805186 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
HOME RUN HEATING AND AIR CONDITIONING
C-20 · Lic. #1141796 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
OASIS PLUMBING HEATING & AIR CONDITIONING
C-20 · also C-36 · Lic. #1093808 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
RANDLE AIR CONDITIONING INC
C-20 · Lic. #782083 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SMART DECISIONS SDS INC
C-20 · also B · Lic. #1060126 · San Marcos 92078
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
SOCAL CONSTRUCTION PLUMBING HVAC
C-20 · also B, C-36 · Lic. #878024 · San Marcos 92069
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
TOTAL HOME COMFORT H V A C SERVICES
C-20 · Lic. #997944 · San Marcos 92069
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026