Plumbing contractors licensed in California

Every active California license that lists plumbing work, sorted by name.

• On-Site Plumbing CO
  Plumbing · Los Angeles · #1076297
  Active No insurance on file
• On-Time Royal Plumbing
  Plumbing · Los Angeles · #1105233
  Active Insurance expiring soon
• Oncall Rooter INC
  Plumbing · Sunnyvale · #1156276
  Active No insurance on file
• Ondaine Enterprises
  General Contractors, Electrical · Chatsworth · #750898
  Active Insurance current
• One & Done Plumbing INC
  Plumbing · Azusa · #1128511
  Active Insurance current
• One Affordable Backflow INC
  Plumbing · San Diego · #1137916
  Active Insurance current
• One Call Plumbing INC
  Plumbing · Whittier · #1071104
  Active No insurance on file
• One Call Retail Services INC
  General Contractors, Electrical · La Mesa · #1027449
  Active Insurance current
• One Day Complete Repipe INC
  General Contractors, Plumbing · San Jose · #885692
  Active Insurance current
• One Flow Backflow INC
  Plumbing · Brea · #1072132
  Active Insurance expiring soon
• One Generation Home Improvements INC
  General Contractors, Electrical · Canyon Country · #1142627
  Active Insurance current
• One Hat Construction INC
  General Contractors, Plumbing · San Diego · #1061807
  Active Insurance current
• One Man Plumbing
  Plumbing · Rio Vista · #1142591
  Active No insurance on file
• One Nation Plumbing
  Plumbing · San Diego · #1115265
  Active No insurance on file
• One Pro Plumbing
  Plumbing · Buena Park · #1031097
  Active No insurance on file
• One Shot Plumbing and Drains LLC
  Plumbing · Anaheim · #1148266
  Active Insurance current
• One Solution Plumbing & Drain
  Plumbing · Rio Vista · #1157852
  Active No insurance on file
• One Source Plumbing & Rooter INC
  Plumbing · San Francisco · #988995
  Active No insurance on file
• One Step Plumbing
  Plumbing · Berkeley · #835677
  Active No insurance on file
• One Stop Comfort Center INC
  General Contractors, Electrical · San Diego · #1087331
  Active Insurance current
• One Stop Modernization
  General Contractors, Electrical · San Lorenzo · #1092278
  Active No insurance on file
• One Stop Plumbing & Rooter
  Plumbing · Whittier · #989152
  Active No insurance on file
• One Stop Plumbing and Drains
  Plumbing · Chula Vista · #893979
  Active No insurance on file
• One Stop Source
  General Contractors, Plumbing · Rancho Cucamonga · #899319
  Active Insurance current
• One Time Plumbing
  Plumbing · Huntington Beach · #958564
  Active No insurance on file
• One Touch Plumbing
  Plumbing · Van Nuys · #1029250
  Active No insurance on file
• One Way Plumbing
  Plumbing · San Diego · #1136857
  Active No insurance on file
• One Way Plumbing INC
  Plumbing · Santa Rosa · #854537
  Active Insurance current
• One Way Rooter & Plumbing
  Plumbing · Santa Fe Springs · #537893
  Active Insurance current
• One Way Rooter Services INC
  Plumbing · Los Angeles · #1100498
  Active Insurance current
• Oneplusone Services
  General Contractors, Plumbing · El Monte · #1092343
  Active No insurance on file
• Onestop Plumbers
  Plumbing · Corona · #951907
  Active Insurance current
• Onnuri Builders INC
  General Contractors, Plumbing · Rowland Heights · #1159004
  Active No insurance on file
• Onnuri Plumbing Construction
  Plumbing · Rowland Heights · #793061
  Active No insurance on file
• Onodera Plumbing
  Plumbing · Sacramento · #788773
  Active No insurance on file
• Onur Guner Bakirman
  General Contractors, Electrical · Belmont · #1006972
  Active No insurance on file
• Opc Plumbing
  Plumbing · Carlsbad · #1008686
  Active No insurance on file
• Open Flow Plumbing
  Plumbing · Arleta · #1067822
  Active Insurance current
• Optimal Plumbing
  Plumbing · Lake Forest · #942010
  Active No insurance on file
• Optimized Plumbing & Piping INC
  Plumbing, HVAC · Sonora · #982621
  Active Insurance current
• Optimo Plumbing and Backflow INC
  Plumbing · Los Angeles · #1009954
  Active Insurance current
• Optimum Plumbing Services INC
  Plumbing · Santa Ana · #938498
  Active Insurance current
• Optimus HVAC & Plumbing INC
  Plumbing, HVAC · Castaic · #1055837
  Active Insurance current
• Optimus Maximus Plumbing
  Plumbing · Riverside · #1087559
  Active No insurance on file
• Option 1 Plumbing CO
  Plumbing · Perris · #941890
  Active No insurance on file
• Options Plumbing CO
  Plumbing · Whittier · #1050207
  Active No insurance on file
• Opus Fidelis
  General Contractors, Electrical · Carlsbad · #1151477
  Active Insurance current
• Oran Plumbing Corp
  Plumbing · San Francisco · #762214
  Active Insurance current
• Orange Coast Plumbing
  General Contractors, Plumbing · Santa Ana · #596002
  Active Insurance current
• Orange Coast Solar
  General Contractors, Electrical · North Hollywood · #1110907
  Active Insurance current
• Orange County Dependable Plumbing INC
  Plumbing · Mission Viejo · #1153778
  Active No insurance on file
• Orange County Drains
  Plumbing · Anaheim · #1115706
  Active Insurance current
• Orange County Fire Protection and Plumbing
  Plumbing · Garden Grove · #809382
  Active No insurance on file
• Orange County Plumbing Heating Air Conditioning CO INC
  Plumbing, HVAC · Tustin · #993990
  Active Insurance current
• Orange County Plumbing INC
  Plumbing · Santa Ana · #852953
  Active Insurance current
• Orange County Pumping INC
  General Contractors, Plumbing · Santa Ana · #680703
  Active Insurance current
• Orange County Royal Plumbing INC
  Plumbing · Costa Mesa · #984145
  Active Insurance current
• Orange Independent Plumbing Services
  Plumbing · Ontario · #1005919
  Active Insurance current
• Orange Plumbing and Rooter INC
  Plumbing · Fountain Valley · #721968
  Active Insurance expiring soon
• Orbas & Associates
  General Contractors, Electrical · Golden Valley · #386855
  Active No insurance on file
• Orbit Electric
  Electrical, Plumbing · San Francisco · #951262
  Active No insurance on file
• Orbix Plumbing
  Plumbing · Sun Valley · #1111789
  Active No insurance on file
• Orca Plumbing
  Plumbing · Escondido · #1103728
  Active No insurance on file
• Ordep Plumbing
  Plumbing · Reseda · #1149865
  Active Insurance current
• Ordonez Plumbing
  Plumbing · Ventura · #1089279
  Active Insurance current
• Orebend Bldrs INC
  General Contractors, Plumbing · San Francisco · #1017529
  Active Insurance current
• Organ & Sons Mechanical INC
  Electrical, Plumbing · Santa Maria · #997854
  Active Insurance current
• Oria Plumbing
  Plumbing · Rohnert Park · #1116222
  Active No insurance on file
• Original Plumbing
  Plumbing · San Diego · #1085592
  Active No insurance on file
• Original Westwood Plumbing INC
  Plumbing · Hermosa Beach · #1009559
  Active No insurance on file
• Orin Good Plumbing
  Plumbing · Mariposa · #1085734
  Active Insurance current
• Orion Plumbing
  Plumbing · San Lorenzo · #1115605
  Active No insurance on file
• Orlando Almaraz Vargas
  Plumbing · Sun Valley · #1089321
  Active No insurance on file
• Orlando's Plumbing & Rooter
  Plumbing · Granada Hills · #1045870
  Active No insurance on file
• Ornelas Plumbing INC
  Plumbing · Pittsburg · #1108007
  Active No insurance on file
• Oro Pro Plumbing INC
  Plumbing · Redwood City · #998394
  Active Insurance current
• Oroson Plumbing
  Plumbing · Lodi · #1029328
  Active No insurance on file
• Orozco Plumbing & Rooter
  Plumbing · Santa Clara · #1126162
  Active No insurance on file
• Orta's Plumbing Heating & Air
  Plumbing · San Jose · #812245
  Active Insurance current
• Ortam Construction INC
  General Contractors, Plumbing · Calabasas · #880225
  Active Insurance current
• Ortega Plumbing
  Plumbing · Surprise · #961196
  Active No insurance on file
• Ortega Plumbing & Rooter LLC
  Plumbing · Richmond · #1105758
  Active No insurance on file
• Ortega Plumbing Services INC
  Plumbing · Los Angeles · #1102172
  Active Insurance current
• Ortega's Plumbing
  Plumbing · Van Nuys · #1074830
  Active No insurance on file
• Ortega's Plumbing Solutions
  Plumbing · San Fernando · #1121013
  Active Insurance current
• Ortiz Plumbing & Drain Solutions
  Plumbing · San Diego · #1151426
  Active Insurance current
• Ortiz Plumbing Drain Cleaning
  Plumbing · Livermore · #1053855
  Active No insurance on file
• Ortiz Specialties Services INC DBA La Drain Experts
  Plumbing · Pacoima · #1051722
  Active Insurance expiring soon
• Orton Plumbing
  Plumbing · San Bernardino · #481694
  Active No insurance on file
• Os Mep INC
  Electrical, Plumbing · Woodinville · #1124851
  Active Insurance expiring soon
• Osburn Plumbing INC
  Plumbing · San Bernardino · #767484
  Active No insurance on file
• Oscalibur Plumbing INC
  Plumbing · Sylmar · #1058254
  Active Insurance current
• Oscar Arguello
  General Contractors, Electrical · Morgan Hill · #771945
  Active Insurance current
• Oscar Hernandez Plumbing
  Plumbing · Montebello · #972588
  Active No insurance on file
• Oscar Sandoval
  Plumbing · Los Angeles · #941687
  Active No insurance on file
• Oscar Santana Herrera-Mejorado
  Plumbing · Truckee · #1107774
  Active Insurance current
• Oscar Sosa
  Plumbing · Simi Valley · #1140851
  Active No insurance on file
• Oscar's Plumbing & Rooter
  Plumbing · Covina · #1126182
  Active Insurance expired
• Oscro Plumbing
  Plumbing · Encino · #1156311
  Active No insurance on file
• Osmart General Construction INC
  General Contractors, Plumbing · Altadena · #922233
  Active Insurance current

Last checked against state records on Oct 10, 2026. How we get this data.