821 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Castro Valley: Plumbing Care Inc, CR Score 65/100; 4.9★ from 1,948 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mr. Rooter Plumbing of The Oakland-Berkeley Area, posts 24/7 hours; ranked #2 of 821.
Most-reviewed: Jazz Heating, Air Conditioning and Plumbing, 3,438 Google reviews at 4.9★, the most of 821 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
821 Castro Valley plumbers are ranked here by CR Score, from ten published factors. 307 are open 24/7, 587 open Saturdays and 435 open Sundays, based on posted hours. The median Google rating is 4.9★ across 821 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Plumbing Care Inc | 65 | 4.9★ (1,948) | San Ramon, 8 mi away | 24/7 | Overall |
| 2 | Mr. Rooter Plumbing of The Oakland-Berkeley Area | 65 | 4.9★ (1,283) | Oakland, 7 mi away | 24/7 | Emergencies |
| 3 | Water Heaters Only, Inc | 64 | 4.9★ (531) | Hayward, 4 mi away | 24/7 | — |
| 4 | Monarch Plumbing and Rooter Inc | 63 | 4.9★ (248) | Hayward, 5 mi away | 24/7 | — |
| 5 | CastleWorks Water Heaters | 63 | 4.9★ (453) | Dublin, 10 mi away | 24/7 | — |
| 6 | Discount Plumbing Rooter Services | 63 | 4.9★ (2,670) | Daly City, 20 mi away | 24/7 | — |
| 7 | Handy Plumbing Man, LLC | 63 | 4.9★ (1,314) | San Carlos, 16 mi away | 24/7 | — |
| 8 | Roto-Rooter Plumbing & Water Cleanup | 62 | 4.9★ (339) | San Ramon, 9 mi away | 24/7 | — |
| 9 | Roto-Rooter Plumbing & Water Cleanup | 62 | 4.8★ (229) | Hayward, 5 mi away | 24/7 | — |
| 10 | Bayshore Plumbers | 62 | 4.9★ (880) | Redwood City, 16 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 1,948 Google reviews, listed on Google as “Plumber”.
Based in Oakland, 7 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 1,283 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 4 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 531 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 5 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 248 Google reviews, listed on Google as “Plumber”.
Based in Dublin, 10 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 453 Google reviews, listed on Google as “Plumber”.
Based in Daly City, 20 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 2,670 Google reviews, listed on Google as “Plumber”.
Based in San Carlos, 16 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 1,314 Google reviews, listed on Google as “Plumber”.
Based in San Ramon, 9 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 339 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 5 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 229 Google reviews, listed on Google as “Plumber”.
Based in Redwood City, 16 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 880 Google reviews, listed on Google as “Plumber”.
Based in San Lorenzo, 4 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 94 Google reviews, listed on Google as “Plumber”.
Based in East Palo Alto, 15 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 1,239 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 2 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 98 Google reviews, listed on Google as “Plumber”.
Based in San Carlos, 16 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 658 Google reviews, listed on Google as “Plumber”.
Based in San Ramon, 8 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 271 Google reviews, listed on Google as “Plumber”.
Based in Pleasanton, 12 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 248 Google reviews, listed on Google as “Plumber”.
Based in Pleasanton, 12 mi away
Ranked #17 because of its Google rating and review volume: 4.9★ from 3,438 Google reviews, the most in Castro Valley.
Based in Redwood City, 15 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 402 Google reviews, listed on Google as “Plumber”.
Based in Livermore, 20 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 1,594 Google reviews, listed on Google as “Plumber”.
Based in Hayward, 4 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 138 Google reviews, listed on Google as “Plumber”.
Based in Burlingame, 17 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 1,910 Google reviews, listed on Google as “Plumber”.
Based in Alameda, 12 mi away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 575 Google reviews, listed on Google as “Plumber”.
Based in Newark, 11 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 353 Google reviews, listed on Google as “Plumber”.
Based in Antioch, 22 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 1,464 Google reviews, listed on Google as “Plumber”.
Based in Alameda, 12 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 191 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 821 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 |
|---|---|---|
| Airborne Plumbing | 5.0★ (2) | 3 mi |
| Aqua Clear Plumbing | 5.0★ (2) | 9 mi |
| ASAP Plumbing & Water Heater | 1.0★ (2) | In Castro Valley |
| Beyond Plumbing | 5.0★ (2) | 7 mi |
| Big Brothers Plumbing Inc | 5.0★ (150) | 10 mi |
| Calimo Plumbing Solutions | 5.0★ (2) | 9 mi |
| East Bay Leak Detectors | 5.0★ (2) | 5 mi |
| Gladiator Rooter and Plumbing | 4.6★ (90) | 5 mi |
| JNJ Rooter and Plumbing LLC | 5.0★ (261) | 16 mi |
| mtz plumbing inc | 5.0★ (2) | 7 mi |
| Octopus Handyman | 5.0★ (2) | 9 mi |
| On R Way Plumbing & Drain Cleaning | 5.0★ (92) | 4 mi |
| Ortiz Construction, Inc. | 5.0★ (1) | In Castro Valley |
| Plumbing The Bay | 4.7★ (148) | 4 mi |
| Proper Plumbing Services | In Castro Valley | |
| Rooter Tec Plumbing and Drain | 5.0★ (2) | 4 mi |
| Simply plumbing and Rooter | 5.0★ (1) | In Castro Valley |
| Total Works General Contractors | 5.0★ (2) | 6 mi |
| Water Heaters Only | 5.0★ (2) | 2 mi |
| Water Works Plumbing Co. Inc. | 5.0★ (2) | 5 mi |
National price ranges in USD, not adjusted for Castro Valley. 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 821 Castro Valley 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 Castro Valley 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 |