Licensed Plumbing (C-36) contractors in California

The California Contractors State License Board (CSLB) lists 11,918 California contractors classified C-36 (Plumbing (C-36)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of July 3, 2026.

Showing 7,501–7,560 of 11,918 contractors

On Time Plumbing Services INC
Panorama City, CA · CSLB #1143917 · as of July 3, 2026
Active · clear
On Time Repipe Specialist
Moreno Valley, CA · CSLB #1095445 · as of July 3, 2026
Active · clear
On-time Royal Plumbing
Los Angeles, CA · CSLB #1105233 · as of July 3, 2026
Active · clear
O & O Plumbing CO INC
Valley Village, CA · CSLB #938467 · as of July 3, 2026
Active · clear
Open Flow Plumbing
Arleta, CA · CSLB #1067822 · as of July 3, 2026
Active · clear
O Plumbing Designs
Costa Mesa, CA · CSLB #952848 · as of July 3, 2026
Active · clear
O P Plumbing INC
Santa Ana, CA · CSLB #1020988 · as of July 3, 2026
Active · clear
Optimal Plumbing
Lake Forest, CA · CSLB #942010 · as of July 3, 2026
Active · clear
Optimal Plumbing CO
Mojave, CA · CSLB #975642 · as of July 3, 2026
Active · clear
Optimo Plumbing And Backflow INC
Los Angeles, CA · CSLB #1009954 · as of July 3, 2026
Active · clear
Optimum Plumbing
Visalia, CA · CSLB #970996 · as of July 3, 2026
Active · clear
Optimum Plumbing Services INC
Santa Ana, CA · CSLB #938498 · as of July 3, 2026
Active · clear
Optimus Maximus Plumbing
Riverside, CA · CSLB #1087559 · as of July 3, 2026
Active · clear
Option 1 Plumbing CO
Perris, CA · CSLB #941890 · as of July 3, 2026
Active · clear
Options Plumbing CO
Whittier, CA · CSLB #1050207 · as of July 3, 2026
Active · clear
Orange County Dependable Plumbing INC
Mission Viejo, CA · CSLB #1153778 · as of July 3, 2026
Active · clear
Orange County Drains And Sewer Services LLC
Yorba Linda, CA · CSLB #1115706 · as of July 3, 2026
Active · clear
Orange County Plumbing INC
Santa Ana, CA · CSLB #852953 · as of July 3, 2026
Active · clear
Orange County Royal Plumbing INC
Costa Mesa, CA · CSLB #984145 · as of July 3, 2026
Active · clear
Orange Independent Plumbing Services
Ontario, CA · CSLB #1005919 · as of July 3, 2026
Active · clear
Orange Plumbing And Rooter INC
Fountain Valley, CA · CSLB #721968 · as of July 3, 2026
Active · clear
Oran Plumbing Corp
San Francisco, CA · CSLB #762214 · as of July 3, 2026
Active · clear
Orbix Plumbing
Sun Valley, CA · CSLB #1111789 · as of July 3, 2026
Active · clear
Orca Plumbing
Escondido, CA · CSLB #1103728 · as of July 3, 2026
Active · clear
Ordep Plumbing
Reseda, CA · CSLB #1149865 · as of July 3, 2026
Active · clear
Ordonez Plumbing
Ventura, CA · CSLB #1089279 · as of July 3, 2026
Active · clear
Oria Plumbing
Rohnert Park, CA · CSLB #1116222 · as of July 3, 2026
Active · clear
Original Westwood Plumbing INC
Hermosa Beach, CA · CSLB #1009559 · as of July 3, 2026
Active · clear
Orin Good Plumbing
Mariposa, CA · CSLB #1085734 · as of July 3, 2026
Active · clear
Orion Plumbing
San Lorenzo, CA · CSLB #1115605 · as of July 3, 2026
Active · clear
Orlando Almaraz Vargas
Sun Valley, CA · CSLB #1089321 · as of July 3, 2026
Active · clear
Orlando's Plumbing & Rooter
Granada Hills, CA · CSLB #1045870 · as of July 3, 2026
Active · clear
Richard Orloff
June Lake, CA · CSLB #529772 · as of July 3, 2026
Active · clear
Ornelas Plumbing INC
Pittsburg, CA · CSLB #1108007 · as of July 3, 2026
Active · clear
Oro Pro Plumbing INC
Redwood City, CA · CSLB #998394 · as of July 3, 2026
Active · clear
Oroson Plumbing
Lodi, CA · CSLB #1029328 · as of July 3, 2026
Active · clear
Orozco Plumbing & Rooter
Santa Clara, CA · CSLB #1126162 · as of July 3, 2026
Active · clear
Orta's Plumbing Heating & Air
San Jose, CA · CSLB #812245 · as of July 3, 2026
Active · clear
Ortega Plumbing
Surprise, CA · CSLB #961196 · as of July 3, 2026
Active · clear
Ortega Plumbing & Rooter LLC
Richmond, CA · CSLB #1105758 · as of July 3, 2026
Active · clear
Ortega Plumbing Services INC
Los Angeles, CA · CSLB #1102172 · as of July 3, 2026
Active · clear
Ortega's Plumbing
Van Nuys, CA · CSLB #1074830 · as of July 3, 2026
Active · clear
Ortega's Plumbing Solutions
San Fernando, CA · CSLB #1121013 · as of July 3, 2026
Active · clear
Mario Cesar Ortiz
West Covina, CA · CSLB #1047476 · as of July 3, 2026
Active · clear
Miguel A Ortiz
Oxnard, CA · CSLB #1047015 · as of July 3, 2026
Active · clear
Ortiz Plumbing
Madera, CA · CSLB #1070616 · as of July 3, 2026
Active · clear
Ortiz Plumbing Drain Cleaning
Livermore, CA · CSLB #1053855 · as of July 3, 2026
Active · clear
Ortiz Plumbing & Drain Solutions
San Diego, CA · CSLB #1151426 · as of July 3, 2026
Active · clear
Orton Plumbing
San Bernardino, CA · CSLB #481694 · as of July 3, 2026
Active · clear
O'ryan Plumbing INC
La Mesa, CA · CSLB #894777 · as of July 3, 2026
Active · clear
O S B Plumbing
Chula Vista, CA · CSLB #961842 · as of July 3, 2026
Active · clear
Osburn Plumbing INC
San Bernardino, CA · CSLB #767484 · as of July 3, 2026
Active · clear
Oscalibur Plumbing INC
Sylmar, CA · CSLB #1058254 · as of July 3, 2026
Active · clear
Oscar Sosa
Simi Valley, CA · CSLB #1140851 · as of July 3, 2026
Active · clear
Oscar's Plumbing & Rooter
Covina, CA · CSLB #1126182 · as of July 3, 2026
Active · clear
Oscro Plumbing
Encino, CA · CSLB #1156311 · as of July 3, 2026
Active · clear
O'shea's Plumbing
Costa Mesa, CA · CSLB #399676 · as of July 3, 2026
Active · clear
Osorio Plumbing CO
Capistrano Beach, CA · CSLB #960461 · as of July 3, 2026
Active · clear
Osp Commercial INC
Lake Forest, CA · CSLB #1125661 · as of July 3, 2026
Active · clear
O S Plumbing INC
Los Angeles, CA · CSLB #966025 · as of July 3, 2026
Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of July 3, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.