Top Picks · Ontario
Best Plumbers in Ontario, CA
Rated and reviewed by real customers. Compare prices, read reviews, and call the top pros near you — for free.
As of July 2026, RatingsNearMe ranks 15 plumbers in Ontario, CA by the RNM Score — a 0–100 rating built from Google ratings, review volume, sentiment, and profile completeness. The top-ranked is AYS Plumbing & Rooter with a 4.9-star rating from 1,756 Google reviews and an RNM Score of 98/100. Also in the top tier: All Pro Cooling, Heating, Plumbing & Electrical and Option One Plumbing. The average rating across all listed plumbers in Ontario is 4.9 stars from 1,194 reviews per business on average.
Plumbing repairs in Ontario average $150–$500 for common fixes. Emergency calls and major work (sewer line, water heater) run $500–$3,000+.
Rankings updated July 4, 2026 · RNM Score = ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · Not paid placement.
Best Overall
Trinity Plumbing LLC
Trinity Plumbing LLC stands out as the top-ranked plumber in Ontario, CA, due to its consistent high ratings and strong reputation for reliable service.
Most Reviewed
Monkey Wrench Plumbing, Heating, Air & Electric
A high review count indicates broad customer experience and trust, making Monkey Wrench a proven choice for many homeowners.
When choosing a plumber in Ontario, compare both overall rating and review volume to gauge reliability, and always ask for a written estimate before work begins.
Local Market Snapshot
15
Businesses listed
4.9★
Avg rating
1,194
Avg reviews
Jul 4, 2026
Last updated
Top Rated Plumbers
4.9-star average from over 1,700 Google reviews reflects exceptional customer satisfaction.
260 N Corporate Way, Upland, CA 91786, USATrusted by thousands, this Ontario plumber holds a stellar 4.8-star rating.
2311 E Locust St, Ontario, CA 91761, USAOntario plumber with a 4.8-star rating from over 3,000 reviews.
10722 Arrow Route STE 602, Rancho Cucamonga, CA 91730, USAPlumbers Rankings in Ontario, CA
| # | Business | Rating | Reviews |
|---|---|---|---|
| #1 | AYS Plumbing & Rooter260 N Corporate Way, Upland, CA 91786, USA | 4.9★ | 1,756 |
| #2 | All Pro Cooling, Heating, Plumbing & Electrical2311 E Locust St, Ontario, CA 91761, USA | 4.8★ | 8,049 |
| #3 | Option One Plumbing10722 Arrow Route STE 602, Rancho Cucamonga, CA 91730, USA | 4.8★ | 3,016 |
| #4 | Dependable Rooter & Plumbing8400 Maple Pl #107, Rancho Cucamonga, CA 91730, USA | 5.0★ | 513 |
| #5 | Trinity Plumbing LLC9431 Haven Ave #100, Rancho Cucamonga, CA 91730, USA | 5.0★ | 74 |
| #6 | Klaus & Sons Plumbing, Heating & Air Conditioning5623 E Arrow Hwy, Montclair, CA 91763, USA | 4.9★ | 992 |
| #7 | Hometown Plumbing Services615 N Euclid Ave suite 843, Ontario, CA 91762, USA | 5.0★ | 40 |
| #8 | Monkey Wrench Plumbing, Heating, Air & Electric3200 E Guasti Rd Suite 100-G, Ontario, CA 91761, USA | 5.0★ | 117 |
| #9 | Royalty Plumbing and Drain3200 E Guasti Rd Suite 100, Ontario, CA 91761, USA | 5.0★ | 450 |
| #10 | High speed rooter & plumbing10709 Vernon Ave, Ontario, CA 91762, USA | 5.0★ | 301 |
Ranked by verified ratings & review volume · Data from Google Business listings · Updated July 2026
All Plumbers in Ontario
Highly rated Ontario plumber with 5.0 stars from over 500 reviews.
8400 Maple Pl #107, Rancho Cucamonga, CA 91730, USA
Trusted Ontario plumber with a perfect 5.0 rating from 74 reviews.
9431 Haven Ave #100, Rancho Cucamonga, CA 91730, USA
Trusted by hundreds of local customers, with a near-perfect 4.9-star rating.
5623 E Arrow Hwy, Montclair, CA 91763, USA
Trusted Ontario plumber with a perfect 5.0★ rating from 40 reviews.
615 N Euclid Ave suite 843, Ontario, CA 91762, USA
A top-rated Ontario plumber with a perfect 5.0-star rating from over 100 reviews.
3200 E Guasti Rd Suite 100-G, Ontario, CA 91761, USA
Trusted Ontario plumber with a perfect 5.0★ rating from over 450 reviews.
3200 E Guasti Rd Suite 100, Ontario, CA 91761, USA
Rated 5.0 stars from 301 Google reviews.
10709 Vernon Ave, Ontario, CA 91762, USA
Trusted by thousands with a 4.8-star average from over 1,300 reviews.
1131 W 6th St Ste 209, Ontario, CA 91762, USA
Rated 5.0 stars from 53 Google reviews, consistently exceptional customer feedback.
2125 S Hellman Ave N, Ontario, CA 91761, USA
Trusted by dozens of locals, with a stellar 4.8-star average rating.
400 Ontario Center, Ontario, CA 91764, USA
Known for exceptional 4.9-star service from over 700 Google reviews in Ontario, CA.
8222 Foothill Blvd, Rancho Cucamonga, CA 91730, USA
Trusted by hundreds of local customers with a stellar 4.9-star rating.
10970 Arrow Route #104, Rancho Cucamonga, CA 91730, USA
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Plumbers in Ontario, CA — Compared
| # | Business | RNM Score | Rating | Reviews |
|---|---|---|---|---|
| 1 | AYS Plumbing & Rooter | 98/100 | 4.9 ★ | 1,756 |
| 2 | All Pro Cooling, Heating, Plumbing & Electrical | 97/100 | 4.8 ★ | 8,049 |
| 3 | Option One Plumbing | 97/100 | 4.8 ★ | 3,016 |
| 4 | Dependable Rooter & Plumbing | 88/100 | 5.0 ★ | 513 |
| 5 | Trinity Plumbing LLC | 82/100 | 5.0 ★ | 74 |
| 6 | Klaus & Sons Plumbing, Heating & Air Conditioning | 87/100 | 4.9 ★ | 992 |
| 7 | Hometown Plumbing Services | 90/100 | 5.0 ★ | 40 |
| 8 | Monkey Wrench Plumbing, Heating, Air & Electric | 96/100 | 5.0 ★ | 117 |
| 9 | Royalty Plumbing and Drain | 100/100 | 5.0 ★ | 450 |
| 10 | High speed rooter & plumbing | 100/100 | 5.0 ★ | 301 |
Ranked by RatingsNearMe Score · ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · July 2026
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Frequently Asked Questions — Plumbers in Ontario
How do I find the best plumbers in Ontario?
Look for businesses with 4.5+ stars, 50+ verified reviews, proper licensing and insurance, and transparent pricing. The top-ranked plumbers in Ontario on this page are scored by our algorithm that weighs ratings, review count, and profile completeness.
Are plumbers in Ontario licensed and insured?
Licensing requirements vary by trade and state. For most home service contractors, CA requires both a state license and liability insurance. Always ask any contractor for proof of current insurance and a copy of their license number before work begins — you can verify most licenses on your state licensing board's website.
How much do plumbers charge in Ontario, CA?
Prices vary by scope, materials, and contractor experience. Use the free quote form on this page to request estimates from multiple local pros simultaneously. Getting 3+ quotes is the single most effective way to avoid overpaying.
What should I look for when hiring a plumbers in Ontario?
Verify licensing and insurance, read recent reviews on multiple platforms, ask for a written estimate before work starts, confirm they pull permits when required, and check references from recent local projects. Featured businesses on this page are ranked by verified ratings and review quality.
How are the plumbers on this page ranked?
Rankings use a transparent algorithm: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Featured Partner listings have paid for enhanced visibility but must still earn their position through real customer reviews — sponsored listings are clearly labeled.
Plumbers in Nearby Cities
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How Rankings Work on This Page
Every plumbers on RatingsNearMe is scored transparently: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Businesses labeled exclusive or premium are Featured Partners — they have paid for enhanced visibility but must still rank through real customer reviews. We cap sponsored boosts so bad businesses can never buy the top spot.
Editorial notice: Ratings are based on publicly available data from Google Business listings. Consumers should independently verify licensing, insurance, and credentials before hiring any service provider. Last updated: July 4, 2026.
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