589 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Grand Terrace: Top Tier Plumbing & Air LLC, CR Score 65/100; 4.9★ from 607 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mr. Rooter Plumbing of San Bernardino, posts 24/7 hours; ranked #2 of 589.
Most-reviewed: Option One Plumbing, 3,017 Google reviews at 4.8★, the most of 589 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
589 Grand Terrace plumbers are ranked here by CR Score, from ten published factors. 317 are open 24/7, 472 open Saturdays and 368 open Sundays, based on posted hours. The median Google rating is 4.9★ across 589 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Top Tier Plumbing & Air LLC | 65 | 4.9★ (607) | Grand Terrace | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of San Bernardino | 65 | 4.8★ (1,351) | Colton, 3 mi away | 24/7 | Emergencies |
| 3 | Water Heater SOS | 64 | 5.0★ (440) | Calimesa, 3 mi away | 24/7 | — |
| 4 | Pride Plumbing Services | 64 | 4.9★ (878) | Redlands, 6 mi away | 24/7 | — |
| 5 | Top Notch Rooter & Plumbing | 63 | 5.0★ (257) | San Bernardino, 3 mi away | 24/7 | — |
| 6 | Elite Plumbing & Drains LLC | 63 | 5.0★ (269) | Riverside, 4 mi away | 24/7 | — |
| 7 | Lincoln Plumbing & Rooter, INC | 63 | 5.0★ (253) | San Bernardino, 4 mi away | 24/7 | — |
| 8 | Mr. Rooter Plumbing of Riverside | 62 | 4.9★ (496) | Riverside, 8 mi away | 24/7 | — |
| 9 | Option One Plumbing | 62 | 4.8★ (3,017) | Rancho Cucamonga, 15 mi away | 24/7 | Most reviews |
| 10 | AS Plumbing Mechanical | 62 | 5.0★ (618) | Fontana, 11 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: 4.9★ from 607 Google reviews, listed on Google as “Plumber”.
Based in Colton, 3 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 1,351 Google reviews, listed on Google as “Plumber”.
Based in Calimesa, 3 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 440 Google reviews, listed on Google as “Plumber”.
Based in Redlands, 6 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 878 Google reviews, listed on Google as “Plumber”.
Based in San Bernardino, 3 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 257 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 4 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 269 Google reviews, listed on Google as “Plumber”.
Based in San Bernardino, 4 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 253 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 496 Google reviews, listed on Google as “Plumber”.
Based in Rancho Cucamonga, 15 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 3,017 Google reviews, listed on Google as “Plumber”.
Based in Fontana, 11 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 Riverside, 11 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 784 Google reviews, listed on Google as “Plumber”.
Based in San Bernardino, 7 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 590 Google reviews, listed on Google as “Plumber”.
Based in Brea, 4 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 182 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 9 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 279 Google reviews, listed on Google as “Plumber”.
Based in Fontana, 11 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 592 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 8 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 495 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 2 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 181 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 4 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 531 Google reviews, listed on Google as “Plumber”.
Based in Moreno Valley, 8 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 198 Google reviews, listed on Google as “Plumber”.
Based in Rialto, 5 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 132 Google reviews, listed on Google as “Plumber”.
Based in Redlands, 9 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 338 Google reviews, listed on Google as “Plumber”.
Based in Bloomington, 2 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 78 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 433 Google reviews, listed on Google as “Plumber”.
Based in Fontana, 7 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 149 Google reviews, listed on Google as “Plumber”.
Based in Riverside, 7 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 142 Google reviews, listed on Google as “Plumber”.
#1 to #25 are shown in full above. Here are #27 to #49, in CR Score order; each links to its profile. We publish the top 49 of 589 ranked plumbers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 27 | Jim & Sons Plumbing & Rooter | 61 | 5.0★ (750) | 11 mi |
| 38 | California Pumping & Sanitation, Inc | 60 | 4.5★ (271) | 4 mi |
| 49 | Schuelke Plumbing & Construction | 60 | 4.9★ (216) | 6 mi |
National price ranges in USD, not adjusted for Grand Terrace. 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 589 Grand Terrace 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 Grand Terrace 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 |