Licensed Heating & Air Conditioning (C-20) contractors in California

The California Contractors State License Board (CSLB) lists 8,936 California contractors classified C-20 (Heating & Air Conditioning (C-20)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of October 8, 2026.

Showing 3,001–3,060 of 8,936 contractors

DL & Ce Mechanical INC
San Pablo, CA · CSLB #1162374 · as of October 8, 2026
Active · clear
D L Fan Services And Balancing
Burlingame, CA · CSLB #833771 · as of October 8, 2026
Active · clear
DLG Heating & Air Conditioning Corp
National City, CA · CSLB #1058447 · as of October 8, 2026
Active · clear
D & L Heating And Air
West Sacramento, CA · CSLB #878913 · as of October 8, 2026
Active · clear
DL HVAC
Walnut, CA · CSLB #1120809 · as of October 8, 2026
Active · clear
Dlo Heating And Air Conditioning
Lathrop, CA · CSLB #1105826 · as of October 8, 2026
Active · clear
Dma Mechanical INC
San Diego, CA · CSLB #1071053 · as of October 8, 2026
Active · clear
D M D Mechanical INC
Palm Desert, CA · CSLB #812757 · as of October 8, 2026
Active · clear
D & M Heating & A / C
Modesto, CA · CSLB #931862 · as of October 8, 2026
Active · clear
D/M Heating & Air INC
Delhi, CA · CSLB #722214 · as of October 8, 2026
Active · clear
D & M Heating & Cooling INC
Sanger, CA · CSLB #993176 · as of October 8, 2026
Active · clear
DM Mechanical INC
Alta Loma, CA · CSLB #1104592 · as of October 8, 2026
Active · clear
DMS Air INC
San Dimas, CA · CSLB #1086341 · as of October 8, 2026
Active · clear
Dna Heating And Cooling INC
Panorama City, CA · CSLB #1046362 · as of October 8, 2026
Active · clear
Dna Mechanical
Riverside, CA · CSLB #1018087 · as of October 8, 2026
Active · clear
D N Heating & Air Conditioning
Bay Point, CA · CSLB #944179 · as of October 8, 2026
Active · clear
DNR A/c & Heating INC
Burbank, CA · CSLB #945200 · as of October 8, 2026
Active · clear
Doair INC
Rancho Cucamonga, CA · CSLB #1104424 · as of October 8, 2026
Active · clear
Doak Heating And Air Conditioning
Paradise, CA · CSLB #1056626 · as of October 8, 2026
Active · clear
Bang Do
La Puente, CA · CSLB #881408 · as of October 8, 2026
Active · clear
Doctor Air INC
Canoga Park, CA · CSLB #1107872 · as of October 8, 2026
Active · clear
Do - Efficiency
Palm Desert, CA · CSLB #902015 · as of October 8, 2026
Active · clear
Do HVAC INC
Penn Valley, CA · CSLB #1067074 · as of October 8, 2026
Active · clear
Charles F Doidge
North Hills, CA · CSLB #446727 · as of October 8, 2026
Active · clear
King Do
Santa Ana, CA · CSLB #1102551 · as of October 8, 2026
Active · clear
Jorge Dominguez
Los Angeles, CA · CSLB #1114929 · as of October 8, 2026
Active · clear
Dominion Ac & Heating
Twin Peaks, CA · CSLB #1089062 · as of October 8, 2026
Active · clear
Don Davis Heating & Cooling INC
Coarsegold, CA · CSLB #1144363 · as of October 8, 2026
Active · clear
Done Right Heating And Air Conditioning
Auburn, CA · CSLB #943874 · as of October 8, 2026
Active · clear
Done Right HVAC Services LLC
Santa Rosa, CA · CSLB #1122386 · as of October 8, 2026
Active · clear
Done Rite Heating & Air INC
Perris, CA · CSLB #1100840 · as of October 8, 2026
Active · clear
Done Wright Heating And Air
Atwater, CA · CSLB #1151038 · as of October 8, 2026
Active · clear
Donner Heating And Air
Truckee, CA · CSLB #1092256 · as of October 8, 2026
Active · clear
Donner Mechanical Heating & Air
Meadow Vista, CA · CSLB #1133101 · as of October 8, 2026
Active · clear
Don's Heating & Air Conditioning INC
Santa Barbara, CA · CSLB #483508 · as of October 8, 2026
Active · clear
Don's Heating And Cooling
Rancho Cordova, CA · CSLB #1038578 · as of October 8, 2026
Active · clear
Don't Sweat It HVAC
San Bernardino, CA · CSLB #1117957 · as of October 8, 2026
Active · clear
Dooley's Heating & Air
Suisun City, CA · CSLB #876936 · as of October 8, 2026
Active · clear
Dori's Heating & Air Conditioning INC
La Quinta, CA · CSLB #1064784 · as of October 8, 2026
Active · clear
Dorr Mechanical
Sacramento, CA · CSLB #1120083 · as of October 8, 2026
Active · clear
Dorsett Mechanical
Diamond Springs, CA · CSLB #1097899 · as of October 8, 2026
Active · clear
Do's Air Conditioning And Refrigeration
Garden Grove, CA · CSLB #964707 · as of October 8, 2026
Active · clear
Dossie Heating And Air Conditioning
Corning, CA · CSLB #1032964 · as of October 8, 2026
Active · clear
Dot'n Sons Heating And Air
Smartsville, CA · CSLB #522206 · as of October 8, 2026
Active · clear
Double R Heating & Air Conditioning INC
Tracy, CA · CSLB #1057850 · as of October 8, 2026
Active · clear
Douglas Mechanical Services
Los Alamitos, CA · CSLB #1021651 · as of October 8, 2026
Active · clear
Doug's Air H V A C
Arleta, CA · CSLB #819808 · as of October 8, 2026
Active · clear
Doug's Heating And Air Conditioning Services
Sacramento, CA · CSLB #877799 · as of October 8, 2026
Active · clear
Dove Air INC
Cathedral City, CA · CSLB #794315 · as of October 8, 2026
Active · clear
Downey Heating & Cooling INC
Etna, CA · CSLB #855692 · as of October 8, 2026
Active · clear
Downey Plumbing Heating & Air Conditioning CO INC
Downey, CA · CSLB #731172 · as of October 8, 2026
Active · clear
Downing Heating INC
Novato, CA · CSLB #1080113 · as of October 8, 2026
Active · clear
Doxy Mechanical
Indio, CA · CSLB #1156005 · as of October 8, 2026
Active · clear
Daniel Doyle
Diamond Springs, CA · CSLB #1079799 · as of October 8, 2026
Active · clear
Doyle Mechanical
Twain Harte, CA · CSLB #578788 · as of October 8, 2026
Active · clear
D P Heating & Air Conditioning
Oakland, CA · CSLB #636826 · as of October 8, 2026
Active · clear
DPL Air Conditioning INC
Placentia, CA · CSLB #801191 · as of October 8, 2026
Active · clear
DR A/c INC
Tarzana, CA · CSLB #968838 · as of October 8, 2026
Active · clear
Drain Pro
Lawndale, CA · CSLB #631384 · as of October 8, 2026
Active · clear
Drain Pros
Florence, CA · CSLB #1045183 · as of October 8, 2026
Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of October 8, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.