92 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Los Osos: Patriot Plumbing and Drain Cleaning, CR Score 64/100; 5.0★ from 574 Google reviews; open 24/7.
Best for emergencies (open 24/7): Culbert Plumbing inc., posts 24/7 hours; ranked #2 of 92.
Most-reviewed: Wighton's Electric, Plumbing, Heating, and Air, 1,714 Google reviews at 4.7★, the most of 92 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
92 Los Osos plumbers are ranked here by CR Score, from ten published factors. 36 are open 24/7, 59 open Saturdays and 43 open Sundays, based on posted hours. The median Google rating is 5.0★ across 92 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Patriot Plumbing and Drain Cleaning | 64 | 5.0★ (574) | San Luis Obispo, 10 mi away | 24/7 | Overall |
| 2 | Culbert Plumbing inc. | 63 | 5.0★ (384) | San Luis Obispo, 11 mi away | 24/7 | Emergencies |
| 3 | Red's On Time Plumbing | 62 | 4.9★ (320) | Atascadero, 15 mi away | 24/7 | — |
| 4 | T-Rex Plumbing & Drain Cleaning | 61 | 5.0★ (121) | Atascadero, 11 mi away | 24/7 | — |
| 5 | Central Plumbing INC | 61 | 5.0★ (262) | Grover Beach, 18 mi away | 24/7 | — |
| 6 | Wallace Plumbing | 61 | 4.8★ (35) | San Luis Obispo, 1 mi away | 24/7 | — |
| 7 | Wighton's Electric, Plumbing, Heating, and Air | 61 | 4.7★ (1,714) | San Luis Obispo, 10 mi away | 24/7 | Most reviews |
| 8 | Justin Jackson's plumbing services | 60 | 5.0★ (387) | Arroyo Grande, 24 mi away | 24/7 | — |
| 9 | Roto-Rooter Plumbing & Water Cleanup | 60 | 4.6★ (110) | San Luis Obispo, 10 mi away | 24/7 | — |
| 10 | Quality 1st Plumbing And Drains | 59 | 5.0★ (128) | Paso Robles, 19 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 574 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 11 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 384 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atascadero, 15 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 320 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atascadero, 11 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 121 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grover Beach, 18 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 262 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 1 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 35 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 10 mi away
Ranked #7 because of its Google rating and review volume: 4.7★ from 1,714 Google reviews, the most in Los Osos.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arroyo Grande, 24 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 387 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 10 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 110 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Paso Robles, 19 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 128 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atascadero, 11 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 11 mi away
Ranked #12 because of its Google rating and trade focus: 4.5★ from 91 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Los Osos
Ranked #13 because of its Google rating and trade focus: 3.8★ from 24 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Los Osos
Ranked #14 because of its Google rating and trade focus: 4.7★ from 39 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Atascadero, 15 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Los Osos
Ranked #16 because of its Google rating and trade focus: 4.5★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Morro Bay, 6 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atascadero, 16 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 24 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in San Luis Obispo, 10 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Atascadero, 18 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Arroyo Grande, 10 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Maria, 13 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Templeton, 19 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grover Beach, 18 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 17 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Maria, 24 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #28, in CR Score order; each links to its profile. We publish the top 28 of 92 ranked plumbers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | The Leak Company | 55 | 5.0★ (6) | 14 mi |
| 27 | Total Plumbing Heating & Air | 54 | 4.4★ (71) | 11 mi |
| 28 | Mission Plumbing | 54 | 5.0★ (18) | 21 mi |
National price ranges in USD, not adjusted for Los Osos. 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 92 Los Osos 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 Osos 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 |