92/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 1,033 Google reviews, open 24/7.
- 4.9★ from 1,033 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 885 Olive Ave Suite D, Novato, CA 94945
Best Plumbers in San Anselmo, CA (2026)
415 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in San Anselmo: Marin Roto-Rooter, CR Score 92/100; 4.9★ from 1,033 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Discount Plumbing Rooter Services, posts 24/7 hours; ranked #2 of 415.
- 38
Most-reviewed: Albert Nahman Plumbing, Heating, and Cooling, 3,311 Google reviews at 4.7★, the most of 415 ranked; ranked #38.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
415 San Anselmo plumbers are ranked here by CR Score, from 8 published factors. 125 are open 24/7, 237 open Saturdays and 163 open Sundays, based on posted hours. The median Google rating is 4.9★ across 415 rated businesses.
Top 10 plumbers in San Anselmo at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Marin Roto-Rooter | 92 | 4.9★ (1,033) | Novato, 9 mi away | 24/7 | Overall |
| 2 | Discount Plumbing Rooter Services | 91 | 4.9★ (2,670) | Daly City, 21 mi away | 24/7 | Emergencies |
| 3 | EO Plumbing Service | 90 | 4.9★ (171) | Albany, 5 mi away | 24/7 | — |
| 4 | Jacob & Sons Plumbing | 90 | 4.9★ (75) | San Anselmo | 24/7 | — |
| 5 | Advanced Plumbing & Drain | 90 | 4.9★ (666) | San Francisco, 14 mi away | 24/7 | — |
| 6 | Local Plumbing | 90 | 5.0★ (87) | San Rafael, 4 mi away | 24/7 | — |
| 7 | Discount Plumbing San Francisco | 90 | 5.0★ (465) | San Francisco, 17 mi away | 24/7 | — |
| 8 | Fast Water Heater Company | 89 | 4.9★ (1,240) | Richmond, 11 mi away | Sat · Sun · Evenings | — |
| 9 | Roto-Rooter | 88 | 4.9★ (391) | San Francisco, 18 mi away | 24/7 | — |
| 10 | Sharky Plumbing 510 & Rooter LLC - Plumbing Service in Oakland Ca | 88 | 5.0★ (62) | Alameda, 8 mi away | 24/7 | — |
The 415 best plumbers in San Anselmo, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Daly City, 21 mi away
91/100CR ScoreRanked #2 because of its Google rating and availability: 4.9★ from 2,670 Google reviews, open 24/7.
- 4.9★ from 2,670 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 570 Sylvan St, Daly City, CA 94014
Based in Albany, 5 mi away
90/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 171 Google reviews, open 24/7.
- 4.9★ from 171 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in San Anselmo
90/100CR ScoreRanked #4 because of its Google rating and availability: 4.9★ from 75 Google reviews, open 24/7.
- 4.9★ from 75 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5 Belle Ave, San Anselmo, CA 94960
Based in San Francisco, 14 mi away
90/100CR ScoreRanked #5 because of its Google rating and availability: 4.9★ from 666 Google reviews, open 24/7.
- 4.9★ from 666 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3450 Sacramento St #204, San Francisco, CA 94118
Based in San Rafael, 4 mi away
90/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 87 Google reviews, open 24/7.
- 5.0★ from 87 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1221 Andersen Dr Unit M, San Rafael, CA 94901
Based in San Francisco, 17 mi away
90/100CR ScoreRanked #7 because of its Google rating and availability: 5.0★ from 465 Google reviews, open 24/7.
- 5.0★ from 465 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4321 24th St, San Francisco, CA 94114
Based in Richmond, 11 mi away
89/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 1,240 Google reviews, listed on Google as “Plumber”.
- 4.9★ from 1,240 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat–Sun 8 AM–5 PM
- Address
- 1065 Hensley St, Richmond, CA 94801
#9 Roto-Rooter
Based in San Francisco, 18 mi away
88/100CR ScoreRanked #9 because of its Google rating and availability: 4.9★ from 391 Google reviews, open 24/7.
- 4.9★ from 391 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 60 29th St #428, San Francisco, CA 94110
Based in Alameda, 8 mi away
88/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 62 Google reviews, open 24/7.
- 5.0★ from 62 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Novato, 7 mi away
88/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 791 Google reviews, listed on Google as “Plumber”.
- 4.8★ from 791 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 22 Digital Dr, Novato, CA 94949
Based in Richmond, 11 mi away
88/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 127 Google reviews, open 24/7.
- 4.9★ from 127 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1000 13th St, Richmond, CA 94801
Based in South San Francisco, 23 mi away
88/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 375 Google reviews, open 24/7.
- 5.0★ from 375 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 387 Newman Dr, South San Francisco, CA 94080
Based in Novato, 7 mi away
87/100CR ScoreRanked #14 because of its Google rating and availability: 4.9★ from 480 Google reviews, open 24/7.
- 4.9★ from 480 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 86 Hamilton Dr Suite A, Novato, CA 94949
#15 Ongaro & Sons
Based in San Anselmo
87/100CR ScoreRanked #15 because of its Google rating and availability: 4.9★ from 762 Google reviews, open 24/7.
- 4.9★ from 762 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11 Ross Ave, San Anselmo, CA 94960
Based in Martinez, 24 mi away
87/100CR ScoreRanked #16 because of its Google rating and availability: 4.8★ from 1,092 Google reviews, open 24/7.
- 4.8★ from 1,092 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2368 Pacheco Blvd, Martinez, CA 94553
Based in San Francisco, 20 mi away
87/100CR ScoreRanked #17 because of its Google rating and availability: 4.7★ from 848 Google reviews, open 24/7.
- 4.7★ from 848 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1070 Quesada Ave, San Francisco, CA 94124
Based in Richmond, 15 mi away
87/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 88 Google reviews, open 24/7.
- 5.0★ from 88 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5327 Jacuzzi St, Richmond, CA 94804
#19 Roto-Rooter
Based in Daly City, 22 mi away
87/100CR ScoreRanked #19 because of its Google rating and availability: 4.9★ from 407 Google reviews, open 24/7.
- 4.9★ from 407 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3840 Bayshore Blvd, Brisbane, CA 94005
Based in Novato, 8 mi away
87/100CR ScoreRanked #20 because of its Google rating and availability: 4.7★ from 83 Google reviews, open 24/7.
- 4.7★ from 83 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 240 Vintage Way #5900, Novato, CA 94945
Based in Alameda, 21 mi away
87/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 191 Google reviews, open 24/7.
- 5.0★ from 191 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1070 Marina Village Pkwy UNIT 202, Alameda, CA 94501
Based in San Francisco, 14 mi away
87/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 74 Google reviews, open 24/7.
- 5.0★ from 74 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3149 California St, San Francisco, CA 94115
Based in San Francisco, 16 mi away
87/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.9★ from 931 Google reviews, listed on Google as “Plumber”.
- 4.9★ from 931 Google reviews
- Hours
- Mon–Sun 6 AM–10 PM
- Address
- 1090 Bryant St, San Francisco, CA 94103
#24 Genteel Plumbers
Based in San Francisco, 20 mi away
87/100CR ScoreRanked #24 because of its Google rating and availability: 4.8★ from 345 Google reviews, open 24/7.
- 4.8★ from 345 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1181 Revere Ave, San Francisco, CA 94124
Based in San Francisco, 18 mi away
87/100CR ScoreRanked #25 because of its Google rating and availability: 4.8★ from 261 Google reviews, open 24/7.
- 4.8★ from 261 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 540 Barneveld Ave # D, San Francisco, CA 94124
Plumbers ranked #26 to #50
#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 415 ranked plumbers here; the rest are on their profiles.
Also serving San Anselmo
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 |
|---|---|---|
| ABC Maintenance and Handyman Services | 5.0★ (2) | 15 mi |
| All Plumbing | 5.0★ (2) | 18 mi |
| Ayala’s Plumbing Solutions | 5.0★ (2) | 20 mi |
| Bay Area Plumbing Inc | 3.0★ (2) | 6 mi |
| Ben Jacobs Plumbing | 5.0★ (2) | 19 mi |
| Big Brothers Plumbing Inc | 5.0★ (150) | 23 mi |
| Chosen Rooter & Plumbing Inc. | 4.8★ (297) | 14 mi |
| Desired Plumbing, Inc. | 5.0★ (2) | 20 mi |
| Erwyn's Plumbing Inc | 5.0★ (2) | 12 mi |
| Flow Form Plumbing | 5.0★ (2) | 19 mi |
| Pacific Plumbing | 3.0★ (2) | 15 mi |
| Paul's Plumbing | 2.0★ (2) | 18 mi |
| Performance Plumbing | 5.0★ (2) | 19 mi |
| Plumbing 1 builders | 5.0★ (2) | 20 mi |
| Plumbing Aaron Bernal Heights | 4.5★ (2) | 20 mi |
| Repipe Specialists of the Bay Area | 4.5★ (64) | 12 mi |
| Rising Design & Construction | 3.0★ (2) | 8 mi |
| Rooter Bong | 5.0★ (2) | 19 mi |
| Ros Plumbing | 5.0★ (2) | 18 mi |
| San Anselmo Plumbing | In San Anselmo |
How much do plumbers cost in San Anselmo?
National price ranges in USD, not adjusted for San Anselmo. 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 |
How to check a plumber's license in California
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).
- Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
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
How we ranked San Anselmo plumbers
We scored 415 San Anselmo plumbers on 8 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. Unknown factors are left out of the score, 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 San Anselmo data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
Plumbers in San Anselmo: frequently asked questions
Who is the best plumber in San Anselmo?
By CR Score, the highest-ranked plumber in San Anselmo, CA is Marin Roto-Rooter with a CR Score of 92/100. It has 4.9★ from 1,033 Google reviews. It is open 24/7. Discount Plumbing Rooter Services (#2) and EO Plumbing Service (#3) follow. We ranked 415 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in San Anselmo?
ContractorsRanked ranks 415 plumbers serving San Anselmo, CA. 2 of them are based in San Anselmo; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which plumbers in San Anselmo are open 24/7?
125 ranked plumbers in San Anselmo post 24/7 hours. The highest-ranked are Marin Roto-Rooter (#1), Discount Plumbing Rooter Services (#2) and EO Plumbing Service (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in San Anselmo work on weekends?
237 of 415 ranked plumbers post Saturday hours and 163 post Sunday hours. The highest-ranked open Saturdays are Marin Roto-Rooter (#1), Discount Plumbing Rooter Services (#2) and EO Plumbing Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check a plumber's license in California?
In California, Contractors State License Board (CSLB) handles licensing and covers C-36 Plumbing contractor license. Search the business or license number at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Jobs of $1,000 or more in labor and materials (from January 1, 2025).
How much does water heater replacement cost in San Anselmo?
Water heater replacement typically costs $882 to $1,826, with $1,348 typical (Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for San Anselmo. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do San Anselmo plumbers have?
The median Google rating among 415 rated plumbers in San Anselmo is 4.9★, with a median of 17 reviews. Albert Nahman Plumbing, Heating, and Cooling has the most, 3,311 reviews, and ranks #38. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank plumbers?
Each plumber gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for San Anselmo
- October 2026: CR Scores recalculated for 415 plumbers serving San Anselmo.
- October 2026: 1 duplicate listing merged.
More plumbers and San Anselmo pages
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