937 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ontario: Option One Plumbing, CR Score 65/100; 4.8★ from 3,017 Google reviews; open 24/7.
Best for emergencies (open 24/7): Rooter Hero Plumbing & Air, posts 24/7 hours; ranked #2 of 937.
Most-reviewed: All Pro Cooling, Heating, Plumbing & Electrical, 7,425 Google reviews at 4.8★, the most of 937 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
937 Ontario plumbers are ranked here by CR Score, from ten published factors. 482 are open 24/7, 758 open Saturdays and 589 open Sundays, based on posted hours. The median Google rating is 4.9★ across 937 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Option One Plumbing | 65 | 4.8★ (3,017) | Rancho Cucamonga, 5 mi away | 24/7 | Overall |
| 2 | Rooter Hero Plumbing & Air | 65 | 4.9★ (1,637) | Pomona, 5 mi away | 24/7 | Emergencies |
| 3 | Scott McLeod Plumbing, Inc. | 64 | 4.9★ (756) | Rancho Cucamonga, 3 mi away | 24/7 | — |
| 4 | AYS Plumbing & Rooter | 64 | 4.9★ (1,726) | Upland, 2 mi away | Sat · Sun · Evenings | — |
| 5 | All Pro Cooling, Heating, Plumbing & Electrical | 64 | 4.8★ (7,425) | Ontario | 24/7 | Most reviews |
| 6 | Redhead Rooter Plumbing Drain Cleaning & Hydrojetting | 63 | 5.0★ (302) | Upland, 3 mi away | 24/7 | — |
| 7 | Bow Tie Plumbing & Rooter | 63 | 5.0★ (334) | Rancho Cucamonga, 5 mi away | 24/7 | — |
| 8 | 24 Rooter & Plumbing, Inc. | 63 | 5.0★ (346) | Claremont, 6 mi away | 24/7 | — |
| 9 | Ramco Plumbing Heating & Air | 63 | 5.0★ (262) | Rancho Cucamonga, 4 mi away | 24/7 | — |
| 10 | AS Plumbing Mechanical | 63 | 5.0★ (618) | Fontana, 10 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 3,017 Google reviews, listed on Google as “Plumber”.
Based in Pomona, 5 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 1,637 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 3 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 756 Google reviews, listed on Google as “Plumber”.
Based in Upland, 2 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,726 Google reviews, listed on Google as “Plumber”.
Based in Ontario
Ranked #5 because of its Google rating and review volume: 4.8★ from 7,425 Google reviews, the most in Ontario.
Based in Upland, 3 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 302 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 5 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 334 Google reviews, listed on Google as “Plumber”.
Based in Claremont, 6 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 346 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 4 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 262 Google reviews, listed on Google as “Plumber”.
Based in Fontana, 10 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 618 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 4 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 229 Google reviews, listed on Google as “Plumber”.
Based in Ontario
Ranked #12 because of its Google rating and trade focus: 5.0★ from 114 Google reviews, listed on Google as “Plumber”.
Based in Ontario
Ranked #13 because of its Google rating and trade focus: 5.0★ from 109 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 6 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 354 Google reviews, listed on Google as “Plumber”.
Based in Pomona, 6 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 542 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 5 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 219 Google reviews, listed on Google as “Plumber”.
Based in Anaheim, 17 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 3,896 Google reviews, listed on Google as “Plumber”.
Based in Diamond Bar, 12 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 926 Google reviews, listed on Google as “Plumber”.
Based in Upland, 3 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 319 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 6 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 485 Google reviews, listed on Google as “Plumber”.
Based in Ontario
Ranked #21 because of its Google rating and trade focus: 4.8★ from 121 Google reviews, listed on Google as “Plumber”.
Based in Fontana, 12 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 592 Google reviews, listed on Google as “Plumber”.
Based in Upland, 4 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 147 Google reviews, listed on Google as “Plumber”.
Based in Covina, 13 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 515 Google reviews, listed on Google as “Plumber”.
Based in Corona, 12 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 936 Google reviews, listed on Google as “Plumber”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 937 ranked plumbers here; the rest are on their profiles.
20 more plumbers within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| A&B Plumbing Solutions | 1.0★ (1) | In Ontario |
| All-in Plumbing Care | In Ontario | |
| Courtesy Plumbing | 4.8★ (387) | 13 mi |
| Currier Plumbing | 5.0★ (2) | 4 mi |
| Danru Plumbing & Rooter | 4.6★ (95) | 4 mi |
| Divine Remodels & More | 5.0★ (2) | 6 mi |
| Grace Rooter & Plumbing | 5.0★ (1) | In Ontario |
| JB Plumbing | 4.5★ (2) | 6 mi |
| JC Plumbing Inc. | 5.0★ (2) | 11 mi |
| Jim & Sons Plumbing & Rooter | 5.0★ (750) | 16 mi |
| Jorod Plumbing Restoration | 5.0★ (2) | 12 mi |
| Leak Finders | In Ontario | |
| Ontario City Wide Plumbing | 5.0★ (38) | In Ontario |
| Orange Coast Pipe | 5.0★ (2) | 4 mi |
| Perfection Plumbing Inc | 5.0★ (2) | 11 mi |
| Professional Bent Tracks Repair Service | In Ontario | |
| Robinson's Mechanical Construction | 4.0★ (2) | 4 mi |
| Royalty Plumbing and Drain | In Ontario | |
| Service Lion Plumbing Heating Air Electric | 4.7★ (1,173) | 18 mi |
| West Coast Plumbing | 5.0★ (1) | In Ontario |
National price ranges in USD, not adjusted for Ontario. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | $882 | $1,348 | $1,826 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
In California, Contractors State License Board (CSLB) licenses C-36 Plumbing contractor license.
Jobs of $1,000 or more in labor and materials (from January 1, 2025).
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
We scored 937 Ontario plumbers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Ontario data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |