92/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 691 Google reviews, open 24/7.
- 4.9★ from 691 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9720 Greenside Dr #9w, Cockeysville, MD 21030
Best Plumbers in Timonium, MD (2026)
436 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Timonium: Donovan WaterWorks, CR Score 92/100; 4.9★ from 691 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Len The Plumber Heating & Air, LLC, posts 24/7 hours; ranked #2 of 436.
- 2
Most-reviewed: Len The Plumber Heating & Air, LLC, 15,911 Google reviews at 4.7★, the most of 436 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
436 Timonium plumbers are ranked here by CR Score, from 8 published factors. 137 are open 24/7, 243 open Saturdays and 170 open Sundays, based on posted hours. The median Google rating is 4.9★ across 436 rated businesses.
Top 10 plumbers in Timonium at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Donovan WaterWorks | 92 | 4.9★ (691) | Cockeysville, 2 mi away | 24/7 | Overall |
| 2 | Len The Plumber Heating & Air, LLC | 91 | 4.7★ (15,911) | Arbutus, 13 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 91 | 4.8★ (4,075) | Baltimore, 10 mi away | 24/7 | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 91 | 4.8★ (752) | Towson, 3 mi away | 24/7 | — |
| 5 | Liberty Pure Solutions | 90 | 4.9★ (553) | Cockeysville, 6 mi away | 24/7 | — |
| 6 | Brian B. Quick Plumbing | 89 | 4.9★ (946) | Reisterstown, 11 mi away | 24/7 | — |
| 7 | Warrior Plumbing & Heating | 89 | 4.9★ (400) | Baltimore, 7 mi away | 24/7 | — |
| 8 | Benjamin Franklin Plumbing of Baltimore | 89 | 4.9★ (326) | Baltimore, 8 mi away | 24/7 | — |
| 9 | Catons Plumbing, Drains & Water Cleanup | 89 | 4.9★ (142) | Towson, 3 mi away | 24/7 | — |
| 10 | Roto-Rooter Plumbing & Water Cleanup | 89 | 4.9★ (1,074) | Arbutus, 16 mi away | 24/7 | — |
The 436 best plumbers in Timonium, 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 Arbutus, 13 mi away
91/100CR ScoreRanked #2 because of its Google rating and review volume: 4.7★ from 15,911 Google reviews, the most Google reviews on this list (15,911).
- 4.7★ from 15,911 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3610 Commerce Dr Suite 808, Halethorpe, MD 21227
Based in Baltimore, 10 mi away
91/100CR ScoreRanked #3 because of its Google rating and availability: 4.8★ from 4,075 Google reviews, open 24/7.
- 4.8★ from 4,075 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 516 N Charles St Ste 407, Baltimore, MD 21201
Based in Towson, 3 mi away
91/100CR ScoreRanked #4 because of its Google rating and availability: 4.8★ from 752 Google reviews, open 24/7.
- 4.8★ from 752 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 606 Baltimore Ave Ste 402-E, Towson, MD 21204
Based in Cockeysville, 6 mi away
90/100CR ScoreRanked #5 because of its Google rating and availability: 4.9★ from 553 Google reviews, open 24/7.
- 4.9★ from 553 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2824 Paper Mill Rd, Phoenix, MD 21131
Based in Reisterstown, 11 mi away
89/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 946 Google reviews, open 24/7.
- 4.9★ from 946 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 218 Main St Suite 4, Reisterstown, MD 21136
Based in Baltimore, 7 mi away
89/100CR ScoreRanked #7 because of its Google rating and availability: 4.9★ from 400 Google reviews, open 24/7.
- 4.9★ from 400 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4123 Roland Ave, Baltimore, MD 21211
Based in Baltimore, 8 mi away
89/100CR ScoreRanked #8 because of its Google rating and availability: 4.9★ from 326 Google reviews, open 24/7.
- 4.9★ from 326 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3702 Yosemite Ave, Baltimore, MD 21215
Based in Towson, 3 mi away
89/100CR ScoreRanked #9 because of its Google rating and availability: 4.9★ from 142 Google reviews, open 24/7.
- 4.9★ from 142 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 22 W Pennsylvania Ave Ste 415, Towson, MD 21204
Based in Arbutus, 16 mi away
89/100CR ScoreRanked #10 because of its Google rating and availability: 4.9★ from 1,074 Google reviews, open 24/7.
- 4.9★ from 1,074 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 505 Progress Dr #119, Linthicum Heights, MD 21090
Based in Dundalk, 13 mi away
88/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 614 Google reviews, open 24/7.
- 4.9★ from 614 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 38 S Dundalk Ave Ste C-LL, Dundalk, MD 21222
Based in Baltimore, 10 mi away
88/100CR ScoreRanked #12 because of its Google rating and availability: 4.8★ from 560 Google reviews, open 24/7.
- 4.8★ from 560 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 616 Water St #316, Baltimore, MD 21202
Based in Catonsville, 13 mi away
88/100CR ScoreRanked #13 because of its Google rating and availability: 4.7★ from 1,684 Google reviews, open 24/7.
- 4.7★ from 1,684 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 801 Geipe Rd, Catonsville, MD 21228
#14 Prime Plumbing
Based in Glen Burnie, 19 mi away
88/100CR ScoreRanked #14 because of its Google rating and availability: 4.8★ from 2,323 Google reviews, open 24/7.
- 4.8★ from 2,323 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7617 Baltimore Annapolis Blvd, Glen Burnie, MD 21060
Based in Ellicott City, 15 mi away
88/100CR ScoreRanked #15 because of its Google rating and availability: 4.8★ from 956 Google reviews, open 24/7.
- 4.8★ from 956 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3545 Ellicott Mills Dr Ste 102, Ellicott City, MD 21043
Based in Eldersburg, 17 mi away
87/100CR ScoreRanked #16 because of its Google rating and availability: 4.9★ from 542 Google reviews, open 24/7.
- 4.9★ from 542 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1912 Liberty Rd Ste D, Eldersburg, MD 21784
Based in Elkridge, 19 mi away
87/100CR ScoreRanked #17 because of its Google rating and availability: 4.8★ from 1,242 Google reviews, open 24/7.
- 4.8★ from 1,242 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6500 Kane Way Ste B, Elkridge, MD 21075
Based in Baltimore, 11 mi away
87/100CR ScoreRanked #18 because of its Google rating and availability: 4.8★ from 4,514 Google reviews, open 24/7.
- 4.8★ from 4,514 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2607 Rolling Rd. #201, Windsor Mill, MD 21244
Based in Perry Hall, 8 mi away
87/100CR ScoreRanked #19 because of its Google rating and availability: 4.9★ from 105 Google reviews, open 24/7.
- 4.9★ from 105 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4213 Silver Spring Rd, Perry Hall, MD 21128
Based in Ellicott City, 15 mi away
87/100CR ScoreRanked #20 because of its Google rating and availability: 4.8★ from 565 Google reviews, open 24/7.
- 4.8★ from 565 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3696 Park Ave #204, Ellicott City, MD 21043
Based in Baltimore, 5 mi away
87/100CR ScoreRanked #21 because of its Google rating and availability: 4.8★ from 199 Google reviews, open 24/7.
- 4.8★ from 199 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6116 MacBeth Dr #6300, Baltimore, MD 21239
Based in Bel Air, 16 mi away
87/100CR ScoreRanked #22 because of its Google rating and availability: 4.8★ from 549 Google reviews, open 24/7.
- 4.8★ from 549 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 336 S Main St Ste 2DE, Bel Air, MD 21014
Based in Eldersburg, 18 mi away
86/100CR ScoreRanked #23 because of its Google rating and availability: 5.0★ from 216 Google reviews, open 24/7.
- 5.0★ from 216 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1332 Londontown Blvd Suite 108A, Eldersburg, MD 21784
#24 Sewer Slayer
Based in Arbutus, 16 mi away
86/100CR ScoreRanked #24 because of its Google rating and availability: 5.0★ from 157 Google reviews, open 24/7.
- 5.0★ from 157 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#25 Mahon Plumbing
Based in Baltimore, 17 mi away
86/100CR ScoreRanked #25 because of its Google rating and availability: 4.9★ from 268 Google reviews, open 24/7.
- 4.9★ from 268 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6824 Fort Smallwood Rd Ste. A, Baltimore, MD 21226
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 436 ranked plumbers here; the rest are on their profiles.
Also serving Timonium
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.
How much do plumbers cost in Timonium?
National price ranges in USD, not adjusted for Timonium. 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 Maryland
In Maryland, Maryland State Board of Plumbing licenses Plumbing work: water supply, drain, waste and vent piping and fixtures.
- 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 Timonium plumbers
We scored 436 Timonium 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 Timonium 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 Timonium: frequently asked questions
Who is the best plumber in Timonium?
By CR Score, the highest-ranked plumber in Timonium, MD is Donovan WaterWorks with a CR Score of 92/100. It has 4.9★ from 691 Google reviews. It is open 24/7. Len The Plumber Heating & Air, LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3) follow. We ranked 436 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in Timonium?
ContractorsRanked ranks 436 plumbers serving Timonium, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which plumbers in Timonium are open 24/7?
137 ranked plumbers in Timonium post 24/7 hours. The highest-ranked are Donovan WaterWorks (#1), Len The Plumber Heating & Air, LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in Timonium work on weekends?
243 of 436 ranked plumbers post Saturday hours and 170 post Sunday hours. The highest-ranked open Saturdays are Donovan WaterWorks (#1), Len The Plumber Heating & Air, LLC (#2) and Roto-Rooter Plumbing & Water Cleanup (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check a plumber's license in Maryland?
In Maryland, Maryland State Board of Plumbing handles licensing and covers Plumbing work: water supply, drain, waste and vent piping and fixtures.
How much does water heater replacement cost in Timonium?
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 Timonium. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Timonium plumbers have?
The median Google rating among 436 rated plumbers in Timonium is 4.9★, with a median of 23 reviews. Len The Plumber Heating & Air, LLC has the most, 15,911 reviews, and ranks #2. 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 Timonium
- October 2026: CR Scores recalculated for 436 plumbers serving Timonium.
- October 2026: 5 duplicate listings merged.
More plumbers and Timonium pages
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Other trades in Timonium
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- Kitchen remodelers in Timonium355 ranked
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- Flooring contractors in Timonium257 ranked
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- Concrete contractors in Timonium185 ranked
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- Deck builders in Timonium201 ranked
- Siding contractors in Timonium431 ranked
- Window installers in Timonium395 ranked
- Gutter installers in Timonium164 ranked
- Insulation contractors in Timonium54 ranked
- Solar installers in Timonium104 ranked
- Garage door repair companies in Timonium66 ranked
- Foundation repair companies in Timonium138 ranked
- Tree services in Timonium164 ranked
- Masonry contractors in Timonium117 ranked
- Water damage restoration companies in Timonium521 ranked
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