496 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Dundalk: Len The Plumber Heating & Air, LLC, CR Score 92/100; 4.7★ from 15,911 Google reviews; open 24/7.
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 496.
Most-reviewed: Michael & Son Services, 8,039 Google reviews at 4.7★, the most of 496 ranked after Len The Plumber Heating & Air, LLC; ranked #39.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
496 Dundalk plumbers are ranked here by CR Score, from 8 published factors. 156 are open 24/7, 282 open Saturdays and 197 open Sundays, based on posted hours. The median Google rating is 4.9★ across 496 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Len The Plumber Heating & Air, LLC | 92 | 4.7★ (15,911) | Arbutus, 8 mi away | 24/7 | Overall |
| 2 | Roto-Rooter Plumbing & Water Cleanup | 92 | 4.8★ (4,075) | Baltimore, 6 mi away | 24/7 | Emergencies |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 92 | 4.9★ (614) | Dundalk | 24/7 | — |
| 4 | Prime Plumbing | 91 | 4.8★ (2,323) | Glen Burnie, 8 mi away | 24/7 | — |
| 5 | Elite Plumbing & Home Services | 90 | 4.9★ (228) | Dundalk | 24/7 | — |
| 6 | Roto-Rooter Plumbing & Water Cleanup | 90 | 4.9★ (1,074) | Arbutus, 9 mi away | 24/7 | — |
| 7 | Catons Plumbing, Drains & Water Cleanup | 89 | 4.8★ (560) | Baltimore, 5 mi away | 24/7 | — |
| 8 | Mahon Plumbing | 89 | 4.9★ (268) | Baltimore, 4 mi away | 24/7 | — |
| 9 | Trust Plumbing & Heating, LLC | 89 | 5.0★ (143) | Baltimore, 4 mi away | 24/7 | — |
| 10 | Boothe's Heating, Air, Plumbing, Drains & Electrical | 89 | 4.9★ (1,461) | Dundalk | 24/7 | — |
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.
Ranked #1 because of its Google rating and review volume: 4.7★ from 15,911 Google reviews, the most Google reviews on this list (15,911).
Based in Baltimore, 6 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 4,075 Google reviews, open 24/7.
Based in Dundalk
Ranked #3 because of its Google rating and availability: 4.9★ from 614 Google reviews, open 24/7.
Based in Glen Burnie, 8 mi away
Ranked #4 because of its Google rating and availability: 4.8★ from 2,323 Google reviews, open 24/7.
Based in Dundalk
Ranked #5 because of its Google rating and availability: 4.9★ from 228 Google reviews, open 24/7.
Based in Arbutus, 9 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 1,074 Google reviews, open 24/7.
Based in Baltimore, 5 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 560 Google reviews, open 24/7.
Based in Baltimore, 4 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 268 Google reviews, open 24/7.
Based in Baltimore, 4 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 143 Google reviews, open 24/7.
Based in Dundalk
Ranked #10 because of its Google rating and availability: 4.9★ from 1,461 Google reviews, open 24/7.
Based in Pasadena, 9 mi away
Ranked #11 because of its Google rating and availability: 4.9★ from 450 Google reviews, open 24/7.
Based in Baltimore, 9 mi away
Ranked #12 because of its Google rating and availability: 4.9★ from 400 Google reviews, open 24/7.
Based in Baltimore, 10 mi away
Ranked #13 because of its Google rating and availability: 4.9★ from 326 Google reviews, open 24/7.
Based in Towson, 12 mi away
Ranked #14 because of its Google rating and availability: 4.8★ from 752 Google reviews, open 24/7.
Based in Elkridge, 14 mi away
Ranked #15 because of its Google rating and availability: 4.8★ from 1,242 Google reviews, open 24/7.
Based in Catonsville, 13 mi away
Ranked #16 because of its Google rating and availability: 4.7★ from 1,684 Google reviews, open 24/7.
Based in Cockeysville, 16 mi away
Ranked #17 because of its Google rating and availability: 4.9★ from 691 Google reviews, open 24/7.
Based in Arbutus, 10 mi away
Ranked #18 because of its Google rating and availability: 5.0★ from 157 Google reviews, open 24/7.
Based in Eldersburg, 10 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 154 Google reviews, open 24/7.
Based in Baltimore, 6 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 175 Google reviews, open 24/7.
Based in Ellicott City, 15 mi away
Ranked #21 because of its Google rating and availability: 4.8★ from 956 Google reviews, open 24/7.
Based in Baltimore, 7 mi away
Ranked #22 because of its Google rating and availability: 4.9★ from 104 Google reviews, open 24/7.
Based in Severna Park, 13 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 178 Google reviews, open 24/7.
Based in Ellicott City, 15 mi away
Ranked #24 because of its Google rating and availability: 4.8★ from 565 Google reviews, open 24/7.
Based in Annapolis, 18 mi away
Ranked #25 because of its Google rating and availability: 4.9★ from 521 Google reviews, open 24/7.
#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 496 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 |
|---|---|---|
| Ackermann Enterprises, Inc | In Dundalk | |
| Around the Clock Plumbing & Heating | 5.0★ (2) | 10 mi |
| Bartrum Services LLC | In Dundalk | |
| Bay Associates Group, Inc. | 3.0★ (2) | 13 mi |
| Cathcart Construction Inc | 5.0★ (2) | 16 mi |
| Charm County Solution LLC | 5.0★ (17) | In Dundalk |
| D.K. Miller Plumbing | 3.0★ (2) | 14 mi |
| DJE Plumbing and Heating | 5.0★ (2) | 2 mi |
| Hardy Plumbing | Emergency Plumber, Drain Cleaning, Pipe Repair, Tankless Water Heater Repair and Replacement in Towson MD | 5.0★ (151) | 10 mi |
| Lux elextric and plumbing | 3.0★ (2) | 5 mi |
| R & G Plumbing & Heating | 5.0★ (2) | 6 mi |
| Scardina Plumbing-Heating Inc | 5.0★ (2) | 6 mi |
| SLO-FLO Plumbing | 5.0★ (213) | 11 mi |
| SLS Services | 3.0★ (2) | 14 mi |
| Stilwell Plumbing & Drain Cleaning | 4.3★ (320) | 4 mi |
| TNT Plumbing & Drain Service, LLC | 4.9★ (110) | 8 mi |
| W Wedmore Plumbing | 5.0★ (2) | 12 mi |
| W. A. Booth Plumbing Services llc | 5.0★ (204) | 12 mi |
| Worldwide Corporation | 4.5★ (2) | 6 mi |
| Wrangler Plumbing & Heating | 5.0★ (2) | 8 mi |
National price ranges in USD, not adjusted for Dundalk. 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 Maryland, Maryland State Board of Plumbing licenses Plumbing work: water supply, drain, waste and vent piping and fixtures.
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 496 Dundalk 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 Dundalk 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 |