Plumbers in Ontario, CA
18 plumbers listed in Ontario, California. 18 with a phone number and 13 with a website.
Ontario accounts for 0% of the plumbers listed in California and ranks #72 among California cities for plumbers.
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Quick answer
Ontario, CA has 18 plumbers listed on USA Business Search. 18 list a phone number and 13 list a website. The most listings are in ZIP codes 91761, 91762.
Updated October 2026Featured · Aging Safely Baths & Showers4Less
Get an accurate bathroom quote in Ontario
Shower replacements, walk-in tubs, roll-in showers and full remodels, installed by factory-certified installers. Tell us about the project, or call and talk to a real person.
Ays Plumbing & Rooter
Quality Pumping Services
A & A Plumbing & Rooter Services
Senor Septic
Care One Professional Plumbing
All Pro Plumbing Corp
Cisneros Brothers Plumbing Inc
Clyde's Plumbing & Drain
Grace Rooter & Plumbing
Monkey Wrench Plumbing, Heating, Air & Electric
Prime Building Solutions
Pro Tech Plumbing
Regal Plumbing & Rooter
Rodriguez Brothers Engineering
Roto-Rooter Plumbing & Water Cleanup
Sears Appliance Repair
Toto USA
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How to choose a plumber in Ontario
- Ask whether the quote is flat-rate or hourly, and whether there is a trip charge.
- For water heaters and re-pipes, ask about permits and inspections.
- Ask what the warranty covers and for how long.
Check the license: Contractors State License Board (CSLB). In California, most home improvement work above the state's small-job limit requires a CSLB license. Look the number up before you sign, and check that it is active and bonded.
Common questions
How many plumbers are listed in Ontario, California?
USA Business Search shows 18 plumbers in Ontario. 18 list a phone number and 13 list a website.
Which ZIP codes do these listings cover?
They include ZIP codes 91761, 91762.
How do I choose a plumber in Ontario?
Ask whether the quote is flat-rate or hourly, and whether there is a trip charge. For water heaters and re-pipes, ask about permits and inspections. Check the license with the Contractors State License Board (CSLB).
How do plumbers in Ontario compare with the rest of California?
Ontario has 0% of the 5,377 plumbers listed in California, which ranks #72 among California cities for this category.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
How much does a bathroom remodel cost in Ontario?
It depends on the scope. Shower pans can start under $2,000, and many installed walk-in tubs start around $15,000, while national brands often run $25,000 to $30,000 installed. For an accurate number, call Aging Safely Baths at 1-888-779-2284 or request a quote.
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