48 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Hermantown: A G O'Brien Plumbing & Heating Co, CR Score 92/100; 4.8★ from 362 Google reviews; open 24/7.
Best for emergencies (open 24/7): After Hours Sewer & Drain Cleaning LLC, posts 24/7 hours; ranked #2 of 48.
Most-reviewed: ASP Mechanical, 1,645 Google reviews at 4.8★, the most of 48 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
48 Hermantown plumbers are ranked here by CR Score, from 8 published factors. 16 are open 24/7, 21 open Saturdays and 18 open Sundays, based on posted hours. The median Google rating is 4.8★ across 48 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | A G O'Brien Plumbing & Heating Co | 92 | 4.8★ (362) | Duluth, 2 mi away | 24/7 | Overall |
| 2 | After Hours Sewer & Drain Cleaning LLC | 90 | 5.0★ (88) | Duluth, 3 mi away | 24/7 | Emergencies |
| 3 | AquaTech Duluth Plumber | 89 | 5.0★ (72) | Duluth, 7 mi away | 24/7 | — |
| 4 | ASP Mechanical | 88 | 4.8★ (1,645) | Duluth, 2 mi away | 24/7 | Most reviews |
| 5 | Pro Service Plumbing | 88 | 5.0★ (84) | Duluth, 7 mi away | 24/7 | — |
| 6 | Stone Plumbing and Heating Inc. | 87 | 4.9★ (395) | Duluth, 10 mi away | 24/7 | — |
| 7 | Flow Sewer and Drain Cleaning | 86 | 4.9★ (56) | Duluth, 10 mi away | 24/7 | — |
| 8 | Plumbing and Heating Solutions Inc | 85 | 5.0★ (68) | Duluth, 8 mi away | 24/7 | — |
| 9 | Duluth Excavation & Septic Services | 84 | 4.8★ (13) | Duluth, 8 mi away | 24/7 | — |
| 10 | Duluth Service Plumbing | 84 | 4.9★ (30) | Duluth, 4 mi away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.8★ from 362 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 3 mi away
Ranked #2 because of its Google rating and availability: 5.0★ from 88 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 7 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 72 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 2 mi away
Ranked #4 because of its Google rating and review volume: 4.8★ from 1,645 Google reviews, the most Google reviews on this list (1,645).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 7 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 84 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 10 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 395 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 10 mi away
Ranked #7 because of its Google rating and availability: 4.9★ from 56 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 8 mi away
Ranked #8 because of its Google rating and availability: 5.0★ from 68 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 8 mi away
Ranked #9 because of its Google rating and availability: 4.8★ from 13 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 4 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 4 mi away
Ranked #11 because of its Google rating and trade focus: 4.6★ from 41 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Duluth, 3 mi away
Ranked #12 because of its Google rating and availability: 4.6★ from 48 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Superior, 9 mi away
Ranked #13 because of its Google rating and availability: 4.4★ from 138 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cloquet, 10 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 6 mi away
Ranked #15 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Superior, 9 mi away
Ranked #16 because of its Google rating and availability: 4.4★ from 63 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cloquet, 21 mi away
Ranked #17 because of its Google rating and availability: 4.6★ from 42 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cloquet, 12 mi away
Ranked #18 because of its Google rating and availability: 5.0★ from 21 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 10 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 215 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 5 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 41 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 18 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 98 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 6 mi away
Ranked #22 because of its Google rating and trade focus: 3.5★ from 12 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Cloquet, 6 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 90 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Duluth, 7 mi away
Ranked #24 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Duluth, 6 mi away
Ranked #25 because of its Google rating and trade focus: 4.3★ from 13 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
#1 to #25 are shown in full above. Here are #26 to #34, in CR Score order; each links to its profile. We publish the top 34 of 48 ranked plumbers here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | A+ Garden Center | 76 | 4.6★ (96) | 6 mi |
| 28 | R J Mehrman & Sons Plumbing | 76 | 3.9★ (7) | 10 mi |
| 34 | Murph's Plumbing & Heating | 72 | 5.0★ (5) | 14 mi |
National price ranges in USD, not adjusted for Hermantown. 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 Minnesota, Minnesota Department of Labor and Industry licenses Plumbing contractor bond and plumber licenses.
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 48 Hermantown 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 Hermantown 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 |