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Plumbers in Ontario, CA — Free Estimates
Get no-obligation quotes from the top plumbers in Ontario. Compare pricing before you commit — it only takes a minute.
As of May 2026, RatingsNearMe ranks 15 plumbers in Ontario, CA by verified customer ratings and review volume. The highest-rated is AYS Plumbing & Rooter with a 4.9-star rating from 1,756 verified reviews. Also in the top tier: Option One Plumbing and Roto-Rooter Plumbing & Water Cleanup. 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 May 17, 2026 · Scored by ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · Not paid placement.
Local Market Snapshot
15
Businesses listed
4.9★
Avg rating
1,194
Avg reviews
May 17, 2026
Last updated
Top Rated Plumbers
AYS Plumbing & Rooter
260 N Corporate Way, Upland, CA 91786, USA
Option One Plumbing
10722 Arrow Route STE 602, Rancho Cucamonga, CA 91730, USA
Roto-Rooter Plumbing & Water Cleanup
1131 W 6th St Ste 209, Ontario, CA 91762, USA
Plumbers Rankings in Ontario, CA
| # | Business | Rating | Reviews |
|---|---|---|---|
| #1 | AYS Plumbing & Rooter260 N Corporate Way, Upland, CA 91786, USA | 4.9★ | 1,756 |
| #2 | Option One Plumbing10722 Arrow Route STE 602, Rancho Cucamonga, CA 91730, USA | 4.8★ | 3,016 |
| #3 | Roto-Rooter Plumbing & Water Cleanup1131 W 6th St Ste 209, Ontario, CA 91762, USA | 4.8★ | 1,399 |
| #4 | Prime Ontario Plumbing Solutions400 Ontario Center, Ontario, CA 91764, USA | 4.8★ | 16 |
| #5 | AMZ Plumbing Inc2125 S Hellman Ave N, Ontario, CA 91761, USA | 5.0★ | 53 |
| #6 | Monkey Wrench Plumbing, Heating, Air & Electric3200 E Guasti Rd Suite 100-G, Ontario, CA 91761, USA | 5.0★ | 117 |
| #7 | Royalty Plumbing and Drain3200 E Guasti Rd Suite 100, Ontario, CA 91761, USA | 5.0★ | 450 |
| #8 | Trinity Plumbing LLC9431 Haven Ave #100, Rancho Cucamonga, CA 91730, USA | 5.0★ | 74 |
| #9 | Dependable Rooter & Plumbing8400 Maple Pl #107, Rancho Cucamonga, CA 91730, USA | 5.0★ | 513 |
| #10 | Klaus & Sons Plumbing, Heating & Air Conditioning5623 E Arrow Hwy, Montclair, CA 91763, USA | 4.9★ | 992 |
Ranked by verified ratings & review volume · Data from Google Business listings · Updated May 2026
All Plumbers in Ontario
Prime Ontario Plumbing Solutions
400 Ontario Center, Ontario, CA 91764, USA
Monkey Wrench Plumbing, Heating, Air & Electric
3200 E Guasti Rd Suite 100-G, Ontario, CA 91761, USA
Royalty Plumbing and Drain
3200 E Guasti Rd Suite 100, Ontario, CA 91761, USA
Trinity Plumbing LLC
9431 Haven Ave #100, Rancho Cucamonga, CA 91730, USA
Dependable Rooter & Plumbing
8400 Maple Pl #107, Rancho Cucamonga, CA 91730, USA
Klaus & Sons Plumbing, Heating & Air Conditioning
5623 E Arrow Hwy, Montclair, CA 91763, USA
All Pro Cooling, Heating, Plumbing & Electrical
2311 E Locust St, Ontario, CA 91761, USA
High speed rooter & plumbing
10709 Vernon Ave, Ontario, CA 91762, USA
Hometown Plumbing Services
615 N Euclid Ave suite 843, Ontario, CA 91762, USA
Scott McLeod Plumbing, Inc.
8222 Foothill Blvd, Rancho Cucamonga, CA 91730, USA
Bobby Blue Plumbing Rancho Cucamonga
10970 Arrow Route #104, Rancho Cucamonga, CA 91730, USA
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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.
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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: May 17, 2026.
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