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

The California Contractors State License Board (CSLB) lists 8,999 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 June 30, 2026.

Showing 3,061–3,120 of 8,999 contractors

Downing Heating INC
Novato, CA · CSLB #1080113 · as of June 30, 2026
Active · clear
Doxy Mechanical
Indio, CA · CSLB #1156005 · as of June 30, 2026
Active · clear
Daniel Doyle
Diamond Springs, CA · CSLB #1079799 · as of June 30, 2026
Active · clear
Doyle Mechanical
Twain Harte, CA · CSLB #578788 · as of June 30, 2026
Active · clear
D P Heating & Air Conditioning
Oakland, CA · CSLB #636826 · as of June 30, 2026
Active · clear
DPL Air Conditioning INC
Placentia, CA · CSLB #801191 · as of June 30, 2026
Active · clear
DR A/c INC
Tarzana, CA · CSLB #968838 · as of June 30, 2026
Active · clear
Drain Pro
Lawndale, CA · CSLB #631384 · as of June 30, 2026
Active · clear
Drain Pros
Florence, CA · CSLB #1045183 · as of June 30, 2026
Active · clear
Drain Right Services INC
Gardena, CA · CSLB #852708 · as of June 30, 2026
Active · clear
DR Air Pro Services
Irvine, CA · CSLB #1151974 · as of June 30, 2026
Active · clear
Chris Dray Heating & Air
Oakdale, CA · CSLB #1056423 · as of June 30, 2026
Active · clear
DR Dio Heating & Air Conditioning
Hacienda Heights, CA · CSLB #988248 · as of June 30, 2026
Active · clear
DRD Mechanical INC
Sacramento, CA · CSLB #1123996 · as of June 30, 2026
Active · clear
Dream Air Corp
Fontana, CA · CSLB #1146079 · as of June 30, 2026
Active · clear
Dre's Heating & A / C
San Diego, CA · CSLB #826794 · as of June 30, 2026
Active · clear
Daniel Corson DBA Dressler Heating & Cooling
Yreka, CA · CSLB #1058564 · as of June 30, 2026
Active · clear
Drewco Air Conditioning
Newbury Park, CA · CSLB #1052839 · as of June 30, 2026
Active · clear
D R G Mechanical INC
Garden Grove, CA · CSLB #1054301 · as of June 30, 2026
Active · clear
DR HVAC
Moorpark, CA · CSLB #1038749 · as of June 30, 2026
Active · clear
D Right Temp Heating & Air
Ben Lomond, CA · CSLB #970437 · as of June 30, 2026
Active · clear
Drive Solutions
Bonsall, CA · CSLB #915347 · as of June 30, 2026
Active · clear
DR Koldaire
Van Nuys, CA · CSLB #587793 · as of June 30, 2026
Active · clear
DR Koolds HVAC Services
Fresno, CA · CSLB #1116685 · as of June 30, 2026
Active · clear
Drones HVAC
Lancaster, CA · CSLB #1098629 · as of June 30, 2026
Active · clear
Dro Pro HVAC
Ramona, CA · CSLB #1107473 · as of June 30, 2026
Active · clear
DR Refrigeration
Lennox, CA · CSLB #699120 · as of June 30, 2026
Active · clear
Dr's Heating And Cooling Services
Corona, CA · CSLB #1109674 · as of June 30, 2026
Active · clear
Dryer Vent Wizard
Los Angeles, CA · CSLB #1123357 · as of June 30, 2026
Active · clear
D S Heating And Air Conditioning
Fresno, CA · CSLB #1010991 · as of June 30, 2026
Active · clear
DS HVAC INC
Ontario, CA · CSLB #1132699 · as of June 30, 2026
Active · clear
DS Mechanical Heating & A/c
Santa Ana, CA · CSLB #1080896 · as of June 30, 2026
Active · clear
D&S Mechanical INC
Fresno, CA · CSLB #1089255 · as of June 30, 2026
Active · clear
D & S Refrigeration And H V A C
Corona, CA · CSLB #840413 · as of June 30, 2026
Active · clear
D T Air & Heating
El Monte, CA · CSLB #874333 · as of June 30, 2026
Active · clear
DT Mechanical
San Leandro, CA · CSLB #954729 · as of June 30, 2026
Active · clear
DT Mechanical Heating & Air
Merced, CA · CSLB #1124518 · as of June 30, 2026
Active · clear
D T S Mechanical INC
Elk Grove, CA · CSLB #865959 · as of June 30, 2026
Active · clear
D T W Mechanical INC
Lakeside, CA · CSLB #842853 · as of June 30, 2026
Active · clear
Artemio Duarte HVAC
Modesto, CA · CSLB #1119883 · as of June 30, 2026
Active · clear
Duarte Mechanical
Bakersfield, CA · CSLB #1118460 · as of June 30, 2026
Active · clear
William Duarte
San Francisco, CA · CSLB #1099006 · as of June 30, 2026
Active · clear
Duchess Heating & Air Conditioning INC
Whittier, CA · CSLB #1114630 · as of June 30, 2026
Active · clear
Ducks Plumbing Heating Air
Sacramento, CA · CSLB #1022840 · as of June 30, 2026
Active · clear
Duct Care Services
Brentwood, CA · CSLB #1028890 · as of June 30, 2026
Active · clear
The Duct Doctor INC
Santa Rosa, CA · CSLB #1104520 · as of June 30, 2026
Active · clear
Duct Dynasty Heating & Air
San Diego, CA · CSLB #1010169 · as of June 30, 2026
Active · clear
Duct Hunter
Fresno, CA · CSLB #1065715 · as of June 30, 2026
Active · clear
Ductless Heating And Cooling
Lynwood, CA · CSLB #1037593 · as of June 30, 2026
Active · clear
Ducts Ina Row
Redding, CA · CSLB #957746 · as of June 30, 2026
Active · clear
Ductworks
Somerton, CA · CSLB #799489 · as of June 30, 2026
Active · clear
Duff Mechanical Services
Aguanga, CA · CSLB #1109379 · as of June 30, 2026
Active · clear
Dugan Climate Control
Calexico, CA · CSLB #981318 · as of June 30, 2026
Active · clear
Dugan Heating & Air Conditioning
Temecula, CA · CSLB #907192 · as of June 30, 2026
Active · clear
Duke's Heating & Air Conditioning LLC
Newark, CA · CSLB #860923 · as of June 30, 2026
Active · clear
Dunbar Comfort Solutions INC
Rancho Cordova, CA · CSLB #991019 · as of June 30, 2026
Active · clear
Dunham Mechanical Services
Riverside, CA · CSLB #993612 · as of June 30, 2026
Active · clear
Dunham & Sons Air - Heating - Plumbing
Hemet, CA · CSLB #680799 · as of June 30, 2026
Active · clear
Dunn Plumbing Heating & Air Conditioning INC
Rancho Cucamonga, CA · CSLB #712182 · as of June 30, 2026
Active · clear
Dunn - Rite Heating & Air
Garden Grove, CA · CSLB #845225 · as of June 30, 2026
Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of June 30, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.