Plumbing contractors in Ontario, CA
50 licenses with the C-36 classification list Ontario (San Bernardino County) as their address with the state, 50 of them active. Active licenses with nothing flagged come first.
- A 2 Z PlumbingC-36 · #1047486 Ontario · San Bernardino County Active
- Acosta Pipeline IncA · C-36 · #1064810 Ontario · San Bernardino County Active
- All Pro Cooling Heating Plumbing & ElectricalC-10 · C-20 · C-36 · #1103983 Ontario · San Bernardino County Active
- American Jetting Services IncC-36 · #845651 Ontario · San Bernardino County Active
- Baumann WaterworksC-36 · #1020247 Ontario · San Bernardino County Active
- Bc7 Construction IncB · C-36 · #1049615 Ontario · San Bernardino County Active
- Brian Yawching KaoB · C-10 · C-20 · C-36 · #897876 Ontario · San Bernardino County Active
- C 2 C Plumbing IncC-36 · #1058502 Ontario · San Bernardino County Active
- D M Gorder Construction CoB · C-36 · C-54 · #632348 Ontario · San Bernardino County Active
- Dylan'S Plumbing Group IncC-36 · #1136831 Ontario · San Bernardino County Active
- E A Plumbing IncC-36 · #603170 Ontario · San Bernardino County Active
- Elias PlumbingC-36 · #1105933 Ontario · San Bernardino County Active
- Fairchild Plumbing & Mechanical IncA · C-16 · C-36 · #606705 Ontario · San Bernardino County Active
- Flow Dynamics IncC-36 · #858166 Ontario · San Bernardino County Active
- G & G PlumbingC-36 · #508994 Ontario · San Bernardino County Active
- G & S Reasonable Plumbing / All TechC-36 · #764181 Ontario · San Bernardino County Active
- Grace Rooter and PlumbingC-36 · #817808 Ontario · San Bernardino County Active
- High Speed Rooter and Plumbing IncA · C-10 · C-20 · C-36 +1 · #1017796 Ontario · San Bernardino County Active
- Ho Soo YooB · C-10 · C-36 · C-38 · #703553 Ontario · San Bernardino County Active
- In and Out PlumbingC-36 · #1030564 Ontario · San Bernardino County Active
- Inter-City Energy Systems IncB · C-10 · C-20 · C-36 · #587709 Ontario · San Bernardino County Active
- J M E Plumbing IncC-36 · #1083921 Ontario · San Bernardino County Active
- Jake Sandoval Dba Clearwater Plumbing & ConstructionB · C-36 · #980596 Ontario · San Bernardino County Active
- Jn Construction IncA · B · C-10 · C-16 +2 · #1001396 Ontario · San Bernardino County Active
- Jnsd Construction IncB · C-10 · C-16 · C-36 · #1080741 Ontario · San Bernardino County Active
- Jose Luis PalaciosC-36 · #986197 Ontario · San Bernardino County Active
- Lvl Up Plumbing IncC-36 · #1146179 Ontario · San Bernardino County Active
- Nelissen PlumbingC-36 · #1142166 Ontario · San Bernardino County Active
- Orange Independent Plumbing ServicesC-36 · #1005919 Ontario · San Bernardino County Active
- P V & C Plumbing and Piping IncC-36 · #529259 Ontario · San Bernardino County Active
- Pisces PlumbingC-20 · C-36 · #1133446 Ontario · San Bernardino County Active
- Pro Rooter Guys IncC-36 · #1052306 Ontario · San Bernardino County Active
- Pro Tech PlumbingC-36 · C-42 · #915091 Ontario · San Bernardino County Active
- R A Plumbing IncC-36 · #1164094 Ontario · San Bernardino County Active
- Reed'S PlumbingC-36 · #788531 Ontario · San Bernardino County Active
- Royalty Plumbing IncC-36 · #1109464 Ontario · San Bernardino County Active
- Safford PlumbingC-36 · #968088 Ontario · San Bernardino County Active
- Showtime Family Plumbing & Rooter IncC-36 · #1151703 Ontario · San Bernardino County Active
- Simple Restoration IncB · C-36 · #1066954 Ontario · San Bernardino County Active
- Sm Waterworks Backflow ServiceA · C-36 · C-60 · #1115619 Ontario · San Bernardino County Active
Source: CSLB license file, Nov 6, 2026All trades in Ontario