Licensed Plumbing (C-36) contractors in California

The California Contractors State License Board (CSLB) lists 12,055 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 October 8, 2026.

Showing 7,441–7,500 of 12,055 contractors

Omega Plumbing Services
Morro Bay, CA · CSLB #1005092 · as of October 8, 2026
Active · clear
Omid Kalif Plumbing
Burbank, CA · CSLB #1065364 · as of October 8, 2026
Active · clear
Om Plumbing Service
Livermore, CA · CSLB #1160901 · as of October 8, 2026
Active · clear
O N B Plumbing
Lakewood, CA · CSLB #732049 · as of October 8, 2026
Active · clear
On Call Plumbing
Lancaster, CA · CSLB #1013633 · as of October 8, 2026
Active · clear
On-call Plumbing & Rooter
San Francisco, CA · CSLB #977337 · as of October 8, 2026
Active · clear
Oncall Rooter INC
Sunnyvale, CA · CSLB #1156276 · as of October 8, 2026
Active · clear
On Demand Rooter
Los Angeles, CA · CSLB #1064597 · as of October 8, 2026
Active · clear
One Affordable Backflow INC
San Diego, CA · CSLB #1137916 · as of October 8, 2026
Active · clear
One Call Plumbing INC
Whittier, CA · CSLB #1071104 · as of October 8, 2026
Active · clear
One & Done Plumbing INC
Azusa, CA · CSLB #1128511 · as of October 8, 2026
Active · clear
One Flow Backflow INC
Brea, CA · CSLB #1072132 · as of October 8, 2026
Active · clear
O'neill Plumbing Company
Pacifica, CA · CSLB #609234 · as of October 8, 2026
Active · clear
One Man Plumbing
Rio Vista, CA · CSLB #1142591 · as of October 8, 2026
Active · clear
One Nation Plumbing
San Diego, CA · CSLB #1115265 · as of October 8, 2026
Active · clear
One Pro Plumbing
Buena Park, CA · CSLB #1031097 · as of October 8, 2026
Active · clear
One Shot Plumbing And Drains LLC
Anaheim, CA · CSLB #1148266 · as of October 8, 2026
Active · clear
One Solution Plumbing & Drain
Rio Vista, CA · CSLB #1157852 · as of October 8, 2026
Active · clear
One Source Plumbing & Rooter INC
San Francisco, CA · CSLB #988995 · as of October 8, 2026
Active · clear
One Step Plumbing
Berkeley, CA · CSLB #835677 · as of October 8, 2026
Active · clear
Onestop Plumbers
Corona, CA · CSLB #951907 · as of October 8, 2026
Active · clear
One Stop Plumbing And Drains
Chula Vista, CA · CSLB #893979 · as of October 8, 2026
Active · clear
One Stop Plumbing & Rooter
Whittier, CA · CSLB #989152 · as of October 8, 2026
Active · clear
One Time Plumbing
Huntington Beach, CA · CSLB #958564 · as of October 8, 2026
Active · clear
One Touch Plumbing
Van Nuys, CA · CSLB #1029250 · as of October 8, 2026
Active · clear
One Way Plumbing
San Diego, CA · CSLB #1136857 · as of October 8, 2026
Active · clear
One Way Plumbing INC
Santa Rosa, CA · CSLB #854537 · as of October 8, 2026
Active · clear
One Way Rooter & Plumbing
Santa Fe Springs, CA · CSLB #537893 · as of October 8, 2026
Active · clear
One Way Rooter Services INC
Los Angeles, CA · CSLB #1100498 · as of October 8, 2026
Active · clear
Andrew Ong
Novato, CA · CSLB #1104468 · as of October 8, 2026
Active · clear
Onnuri Plumbing Construction
Rowland Heights, CA · CSLB #793061 · as of October 8, 2026
Active · clear
Onodera Plumbing
Sacramento, CA · CSLB #788773 · as of October 8, 2026
Active · clear
On Point Plumbing
Chula Vista, CA · CSLB #1020877 · as of October 8, 2026
Active · clear
On Point Plumbing Systems INC
Saugus, CA · CSLB #1029874 · as of October 8, 2026
Active · clear
On R Way Plumbing LLC
Hayward, CA · CSLB #1036700 · as of October 8, 2026
Active · clear
On-site Plumbing CO
Los Angeles, CA · CSLB #1076297 · as of October 8, 2026
Active · clear
On Site Plumbing & Septic
Atascadero, CA · CSLB #1125955 · as of October 8, 2026
Active · clear
Eduaedo Loza DBA On The Clock Rooter & Plumbing
Oakland, CA · CSLB #1077669 · as of October 8, 2026
Active · clear
On The Go Plumbing And Drains
Buena Park, CA · CSLB #1131562 · as of October 8, 2026
Active · clear
On The Ritz Plumbing INC
Penryn, CA · CSLB #939954 · as of October 8, 2026
Active · clear
On The Spot Plumbing
Contoe, CA · CSLB #913693 · as of October 8, 2026
Active · clear
On Time Plumbing
Mountain View, CA · CSLB #992579 · as of October 8, 2026
Active · clear
On Time Plumbing Services INC
Panorama City, CA · CSLB #1143917 · as of October 8, 2026
Active · clear
On Time Repipe Specialist
Moreno Valley, CA · CSLB #1095445 · as of October 8, 2026
Active · clear
On-time Royal Plumbing
Los Angeles, CA · CSLB #1105233 · as of October 8, 2026
Active · clear
On Time Water Heaters INC
Simi Valley, CA · CSLB #1136748 · as of October 8, 2026
Active · clear
O & O Plumbing CO INC
Valley Village, CA · CSLB #938467 · as of October 8, 2026
Active · clear
Open Flow Plumbing
Arleta, CA · CSLB #1067822 · as of October 8, 2026
Active · clear
O P Plumbing INC
Santa Ana, CA · CSLB #1020988 · as of October 8, 2026
Active · clear
Optimal Plumbing
Lake Forest, CA · CSLB #942010 · as of October 8, 2026
Active · clear
Optimum Plumbing Services INC
Santa Ana, CA · CSLB #938498 · as of October 8, 2026
Active · clear
Optimus Maximus Plumbing
Riverside, CA · CSLB #1087559 · as of October 8, 2026
Active · clear
Option 1 Plumbing CO
Perris, CA · CSLB #941890 · as of October 8, 2026
Active · clear
Options Plumbing CO
Whittier, CA · CSLB #1050207 · as of October 8, 2026
Active · clear
Orange County Dependable Plumbing INC
Mission Viejo, CA · CSLB #1153778 · as of October 8, 2026
Active · clear
Orange County Drains And Sewer Services LLC
Yorba Linda, CA · CSLB #1115706 · as of October 8, 2026
Active · clear
Orange County Plumbing INC
Santa Ana, CA · CSLB #852953 · as of October 8, 2026
Active · clear
Orange County Royal Plumbing INC
Costa Mesa, CA · CSLB #984145 · as of October 8, 2026
Active · clear
Orange Independent Plumbing Services
Ontario, CA · CSLB #1005919 · as of October 8, 2026
Active · clear
Orange Plumbing And Rooter INC
Fountain Valley, CA · CSLB #721968 · 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.