438 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Mays Chapel: Len The Plumber Heating & Air, LLC, CR Score 64/100; 4.7★ from 15,911 Google reviews; open 24/7.
Best for emergencies (open 24/7): Donovan WaterWorks, posts 24/7 hours; ranked #2 of 438.
Most-reviewed: Michael & Son Services, 8,039 Google reviews at 4.7★, the most of 438 ranked after Len The Plumber Heating & Air, LLC; ranked #46.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
438 Mays Chapel plumbers are ranked here by CR Score, from ten published factors. 136 are open 24/7, 245 open Saturdays and 169 open Sundays, based on posted hours. The median Google rating is 4.9★ across 438 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Len The Plumber Heating & Air, LLC | 64 | 4.7★ (15,911) | Arbutus, 13 mi away | 24/7 | Overall |
| 2 | Donovan WaterWorks | 64 | 4.9★ (691) | Cockeysville, 2 mi away | 24/7 | Emergencies |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 63 | 4.8★ (4,075) | Baltimore, 10 mi away | 24/7 | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 63 | 4.8★ (752) | Towson, 3 mi away | 24/7 | — |
| 5 | Brian B. Quick Plumbing | 62 | 4.9★ (946) | Reisterstown, 10 mi away | 24/7 | — |
| 6 | Liberty Pure Solutions | 62 | 4.9★ (553) | Cockeysville, 7 mi away | 24/7 | — |
| 7 | Warrior Plumbing & Heating | 62 | 4.9★ (400) | Baltimore, 7 mi away | 24/7 | — |
| 8 | Benjamin Franklin Plumbing of Baltimore | 61 | 4.9★ (326) | Baltimore, 7 mi away | 24/7 | — |
| 9 | Catons Plumbing, Drains & Water Cleanup | 61 | 4.7★ (1,684) | Catonsville, 12 mi away | 24/7 | — |
| 10 | Catons Plumbing, Drains & Water Cleanup | 61 | 4.9★ (142) | Towson, 3 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 review volume: 4.7★ from 15,911 Google reviews, the most in Mays Chapel.
Based in Cockeysville, 2 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 691 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 10 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 4,075 Google reviews, listed on Google as “Plumber”.
Based in Towson, 3 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 752 Google reviews, listed on Google as “Plumber”.
Based in Reisterstown, 10 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 946 Google reviews, listed on Google as “Plumber”.
Based in Cockeysville, 7 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 553 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 7 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 400 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 7 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 326 Google reviews, listed on Google as “Plumber”.
Based in Catonsville, 12 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 1,684 Google reviews, listed on Google as “Plumber”.
Based in Towson, 3 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 142 Google reviews, listed on Google as “Plumber”.
Based in Arbutus, 15 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 1,074 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 10 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 560 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 5 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 199 Google reviews, listed on Google as “Plumber”.
Based in Ellicott City, 14 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 956 Google reviews, listed on Google as “Plumber”.
Based in Dundalk, 14 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 614 Google reviews, listed on Google as “Plumber”.
Based in Glen Burnie, 19 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 2,323 Google reviews, listed on Google as “Plumber”.
Based in Eldersburg, 15 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 542 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 9 mi away
Ranked #18 because of its Google rating and review volume: 4.8★ from 4,514 Google reviews.
Based in Ellicott City, 14 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 565 Google reviews, listed on Google as “Plumber”.
Based in Elkridge, 18 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 1,242 Google reviews, listed on Google as “Plumber”.
Based in Baltimore, 13 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 1,366 Google reviews, listed on Google as “Plumber”.
Based in Perry Hall, 9 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 Eldersburg, 16 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 216 Google reviews, listed on Google as “Plumber”.
Based in Bel Air, 18 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 549 Google reviews, listed on Google as “Plumber”.
Based in Arbutus, 15 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 157 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 438 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.
National price ranges in USD, not adjusted for Mays Chapel. 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 438 Mays Chapel 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 Mays Chapel 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 |