Plumbing Contractors in Ontario, CA
51 Plumbing contractors in Ontario, California appear in the CSLB public record — 48 with an active license. Check each one's status, bond, workers' compensation, and classifications before you hire.
JN Construction Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Orange Independent Plumbing Services
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
High Speed Rooter and Plumbing Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Baumann Waterworks
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Ruvico Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
In and Out Plumbing
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
A 2 Z Plumbing
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Bc7 Construction Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
A&b Plumbing Solutions Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Pro Rooter Guys Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
C 2 C Plumbing Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Acosta Pipeline Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Simple Restoration Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
JNSD Construction Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
J M E Plumbing Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
All Pro Cooling Heating Plumbing & Electrical
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Elias Plumbing
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Royalty Plumbing Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
SM Waterworks Backflow Service
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
West Coast Pipeline Specialist
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Pisces Plumbing
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Dylan's Plumbing Group Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
Vargos Plumbing & Sewer Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
STS Plumbing & Rooter Inc
C-36 · Ontario, CA
Verified August 4, 2026 · Bonded
More Plumbing cities in California
Before you hire in Ontario
Frequently asked questions
How many Plumbing contractors are licensed in Ontario, California?
This directory lists 51 Plumbing contractors in Ontario, California, of which 48 currently hold an active CSLB license.
How do I check if a Plumbing contractor is licensed in Ontario, California?
Open the contractor's profile here for their dated CSLB status, or look up their license number directly on the CSLB "Check a License" tool. A license must be active (not expired, suspended, or inactive) to be valid.
Should a Plumbing contractor carry a bond and workers' compensation?
Most active CSLB licensees carry a contractor bond, and any contractor with employees must carry workers' compensation. Each profile shows what the CSLB record reports.