553 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Los Altos: Roto-Rooter Plumbing & Water Cleanup, CR Score 64/100; 4.8★ from 1,239 Google reviews; open 24/7.
Best for emergencies (open 24/7): Bayshore Plumbers, posts 24/7 hours; ranked #2 of 553.
Most-reviewed: EJ Plumbing & Water Heaters, 3,719 Google reviews at 4.9★, the most of 553 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
553 Los Altos plumbers are ranked here by CR Score, from ten published factors. 228 are open 24/7, 436 open Saturdays and 342 open Sundays, based on posted hours. The median Google rating is 4.9★ across 553 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Roto-Rooter Plumbing & Water Cleanup | 64 | 4.8★ (1,239) | East Palo Alto, 6 mi away | 24/7 | Overall |
| 2 | Bayshore Plumbers | 64 | 4.9★ (880) | Redwood City, 8 mi away | 24/7 | Emergencies |
| 3 | Handy Plumbing Man, LLC | 64 | 4.9★ (1,314) | San Carlos, 11 mi away | 24/7 | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 64 | 4.8★ (781) | Sunnyvale, 7 mi away | 24/7 | — |
| 5 | Smart Plumbers Inc. DBA Smart Plumbers & Rooters | 64 | 4.8★ (1,167) | Santa Clara, 9 mi away | 24/7 | — |
| 6 | Roto-Rooter Plumbing & Water Cleanup | 63 | 4.8★ (1,039) | Santa Clara, 9 mi away | 24/7 | — |
| 7 | Mike Counsil Plumbing and Rooter | 63 | 4.8★ (1,482) | San Jose, 11 mi away | 24/7 | — |
| 8 | Rooter Hero Plumbing & Air of San Jose | 63 | 4.8★ (3,216) | San Jose, 16 mi away | 24/7 | — |
| 9 | Water Heaters Only, Inc | 63 | 5.0★ (402) | Redwood City, 8 mi away | 24/7 | — |
| 10 | Superior Plumbing | 63 | 4.9★ (433) | San Jose, 8 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 1,239 Google reviews, listed on Google as “Plumber”.
Based in Redwood City, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 880 Google reviews, listed on Google as “Plumber”.
Based in San Carlos, 11 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 1,314 Google reviews, listed on Google as “Plumber”.
Based in Sunnyvale, 7 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 781 Google reviews, listed on Google as “Plumber”.
Based in Santa Clara, 9 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 1,167 Google reviews, listed on Google as “Plumber”.
Based in Santa Clara, 9 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 1,039 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 11 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 1,482 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 16 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 3,216 Google reviews, listed on Google as “Plumber”.
Based in Redwood City, 8 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 402 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 8 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 433 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 875 Google reviews, listed on Google as “Plumber”.
Based in Santa Clara, 9 mi away
Ranked #12 because of its Google rating and review volume: 4.9★ from 3,719 Google reviews, the most in Los Altos.
Based in Santa Clara, 7 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 258 Google reviews, listed on Google as “Plumber”.
Based in San Carlos, 12 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 Sunnyvale, 5 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 160 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 12 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 1,298 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 11 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 552 Google reviews, listed on Google as “Plumber”.
Based in Redwood City, 10 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 253 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 14 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 609 Google reviews, listed on Google as “Plumber”.
Based in Campbell, 12 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 308 Google reviews, listed on Google as “Plumber”.
Based in San Jose, 15 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 459 Google reviews, listed on Google as “Plumber”.
Based in Palo Alto, 5 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 105 Google reviews, listed on Google as “Plumber”.
Based in Santa Clara, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.9★ from 184 Google reviews, listed on Google as “Plumber”.
Based in Menlo Park, 8 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 150 Google reviews, listed on Google as “Plumber”.
Based in Newark, 12 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 353 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 553 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 |
|---|---|---|
| 24HR Aloha Plumbing | 4.0★ (2) | 8 mi |
| ASAP Plumbing & Water Heater | 3.0★ (2) | 3 mi |
| Bigg Tree Rooter & Plumbing | 4.9★ (274) | 13 mi |
| Brother's Plumbing | 4.6★ (27) | 1 mi |
| CPR Plumbing | 5.0★ (2) | 11 mi |
| Ever Plumbing Garden and Landscaping | 5.0★ (2) | 9 mi |
| Frontline Plumbing | 5.0★ (2) | 5 mi |
| Gafi Builders and Design, Inc. | 5.0★ (2) | 6 mi |
| Heise's Plumbing | 4.9★ (40) | 5 mi |
| Manica Builders | 3.0★ (2) | 12 mi |
| Monarch Plumbing and Rooter Inc | 4.9★ (248) | 17 mi |
| Mr. Drain Plumbing of Milpitas | 5.0★ (2) | 12 mi |
| Prestige Plumbing Solutions | 5.0★ (2) | 4 mi |
| Pumps & Works | 5.0★ (2) | 9 mi |
| Ron Williams Plumbing & Heating | 4.0★ (2) | 10 mi |
| Rooter Solutions Plumbers | 4.9★ (157) | 12 mi |
| Science Plumbing Inc | 5.0★ (52) | 6 mi |
| Steve K Plumbing | 3.0★ (2) | 7 mi |
| TKM Plumbing Inc | 3.0★ (2) | 7 mi |
| Trademark Plumbing Co. | 5.0★ (2) | 8 mi |
National price ranges in USD, not adjusted for Los Altos. 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 553 Los Altos 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 Los Altos 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 |