91/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 521 Google reviews, open 24/7.
- 4.9★ from 521 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 42 Hudson St #212, Annapolis, MD 21401
Best Plumbers in Londontowne, MD (2026)
402 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Londontowne: Howard Plumbing, CR Score 91/100; 4.9★ from 521 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 402.
- 8
Most-reviewed: Len The Plumber Heating & Air, LLC, 15,911 Google reviews at 4.7★, the most of 402 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
402 Londontowne plumbers are ranked here by CR Score, from 8 published factors. 144 are open 24/7, 250 open Saturdays and 177 open Sundays, based on posted hours. The median Google rating is 4.9★ across 402 rated businesses.
Top 10 plumbers in Londontowne at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Howard Plumbing | 91 | 4.9★ (521) | Annapolis, 4 mi away | 24/7 | Overall |
| 2 | Roto-Rooter Plumbing & Water Cleanup | 91 | 4.8★ (1,128) | Annapolis, 5 mi away | 24/7 | Emergencies |
| 3 | Catons Plumbing, Drains & Water Cleanup | 90 | 5.0★ (312) | Annapolis, 5 mi away | 24/7 | — |
| 4 | Benjamin Franklin Plumbing of Annapolis | 90 | 4.9★ (283) | Annapolis, 4 mi away | 24/7 | — |
| 5 | Staton Heating, Cooling & Plumbing | 89 | 4.9★ (2,904) | Annapolis, 4 mi away | 24/7 | — |
| 6 | James A. Douglas Plumbing & Gas Fitting LLC | 89 | 5.0★ (163) | Arnold, 6 mi away | 24/7 | — |
| 7 | Prime Plumbing | 89 | 4.8★ (2,323) | Glen Burnie, 16 mi away | 24/7 | — |
| 8 | Len The Plumber Heating & Air, LLC | 88 | 4.7★ (15,911) | Arbutus, 23 mi away | 24/7 | Most reviews |
| 9 | Park Plumbing LLC | 88 | 5.0★ (178) | Severna Park, 9 mi away | 24/7 | — |
| 10 | Carter Quality Plumbing | 88 | 5.0★ (68) | Greater Upper Marlboro, 4 mi away | 24/7 | — |
The 402 best plumbers in Londontowne, 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 Annapolis, 5 mi away
91/100CR ScoreRanked #2 because of its Google rating and availability: 4.8★ from 1,128 Google reviews, open 24/7.
- 4.8★ from 1,128 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 222 Severn Ave Ste 13, Annapolis, MD 21403
Based in Annapolis, 5 mi away
90/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 312 Google reviews, open 24/7.
- 5.0★ from 312 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 41 State Cir Ste 5, Annapolis, MD 21401
Based in Annapolis, 4 mi away
90/100CR ScoreRanked #4 because of its Google rating and availability: 4.9★ from 283 Google reviews, open 24/7.
- 4.9★ from 283 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1125 West St Suite #609, Annapolis, MD 21401
Based in Annapolis, 4 mi away
89/100CR ScoreRanked #5 because of its Google rating and availability: 4.9★ from 2,904 Google reviews, open 24/7.
- 4.9★ from 2,904 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1991 Moreland Pkwy, Annapolis, MD 21401
Based in Arnold, 6 mi away
89/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 163 Google reviews, open 24/7.
- 5.0★ from 163 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Glen Burnie, 16 mi away
89/100CR ScoreRanked #7 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 Arbutus, 23 mi away
88/100CR ScoreRanked #8 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 Severna Park, 9 mi away
88/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 178 Google reviews, open 24/7.
- 5.0★ from 178 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 836 Ritchie Hwy Suite 20, Severna Park, MD 21146
Based in Greater Upper Marlboro, 4 mi away
88/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 68 Google reviews, open 24/7.
- 5.0★ from 68 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Pasadena, 13 mi away
88/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 450 Google reviews, open 24/7.
- 4.9★ from 450 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3017 Mountain Rd, Pasadena, MD 21122
Based in Beltsville, 20 mi away
88/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 1,368 Google reviews, open 24/7.
- 4.9★ from 1,368 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 10739 Tucker St Suite 100-B, Beltsville, MD 20705
Based in Arbutus, 21 mi away
87/100CR ScoreRanked #13 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
#14 Abend Services
Based in Severna Park, 10 mi away
87/100CR ScoreRanked #14 because of its Google rating and availability: 4.9★ from 146 Google reviews, open 24/7.
- 4.9★ from 146 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 44 Robinson Landing Rd, Severna Park, MD 21146
Based in Eldersburg, 14 mi away
87/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 154 Google reviews, open 24/7.
- 5.0★ from 154 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Annapolis, 4 mi away
86/100CR ScoreRanked #16 because of its Google rating and availability: 4.7★ from 63 Google reviews, open 24/7.
- 4.7★ from 63 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 36 Oak Ct, Annapolis, MD 21401
Based in Beltsville, 21 mi away
86/100CR ScoreRanked #17 because of its Google rating and availability: 4.8★ from 1,053 Google reviews, open 24/7.
- 4.8★ from 1,053 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 12000 Indian Creek Ct, Beltsville, MD 20705
Based in Washington, D.C., 19 mi away
86/100CR ScoreRanked #18 because of its Google rating and availability: 4.9★ from 484 Google reviews, open 24/7.
- 4.9★ from 484 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 809 Cedar Heights Dr Apt d, Capitol Heights, MD 20743
Based in Annapolis, 4 mi away
86/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 238 Google reviews, open 24/7.
- 5.0★ from 238 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2 Oak Ct, Annapolis, MD 21401
Based in Elkridge, 22 mi away
86/100CR ScoreRanked #20 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 Arnold, 7 mi away
86/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 37 Google reviews, open 24/7.
- 5.0★ from 37 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1521 Ritchie Hwy suite 256, Arnold, MD 21012
Based in Pasadena, 13 mi away
86/100CR ScoreRanked #22 because of its Google rating and availability: 4.9★ from 113 Google reviews, open 24/7.
- 4.9★ from 113 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4471 Mountain Rd, Pasadena, MD 21122
Based in Dundalk, 22 mi away
86/100CR ScoreRanked #23 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
#24 Mahon Plumbing
Based in Baltimore, 18 mi away
86/100CR ScoreRanked #24 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
Based in Glen Burnie, 8 mi away
86/100CR ScoreRanked #25 because of its Google rating and availability: 4.7★ from 100 Google reviews, open 24/7.
- 4.7★ from 100 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
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 402 ranked plumbers here; the rest are on their profiles.
Also serving Londontowne
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 |
|---|---|---|
| Abbott's Plumbing | 4.6★ (426) | 21 mi |
| All Clear Plumbing & Drain Service, LLC | 4.8★ (547) | 20 mi |
| Around the Clock Plumbing & Heating | 5.0★ (2) | 21 mi |
| Beltway Pros Handyman Services | 5.0★ (2) | 16 mi |
| BK Plumbing | 4.9★ (283) | 19 mi |
| Cathcart Construction Inc | 5.0★ (2) | 24 mi |
| Choc Home Remodeling LLC | 5.0★ (2) | 21 mi |
| D.K. Miller Plumbing | 3.0★ (2) | 10 mi |
| Davis Plumbing & Heating Inc | 5.0★ (2) | 13 mi |
| DJE Plumbing and Heating | 5.0★ (2) | 20 mi |
| G&M Landscaping Services | 4.5★ (2) | 23 mi |
| Hot Water Express | Water Heater Service, Repair NOW!, Installation and Replacement in the DMV | 4.9★ (62) | 16 mi |
| Joint Plumbing Apprentice | 4.5★ (2) | 11 mi |
| Lux elextric and plumbing | 3.0★ (2) | 20 mi |
| R D Springer Plumbing & Heating | 5.0★ (2) | 23 mi |
| Sam Plumbing And Drain, LLC | 5.0★ (2) | 19 mi |
| tck plumbing | 5.0★ (2) | 16 mi |
| Tendongkeng Construction LLC | 3.0★ (2) | 19 mi |
| TL Plumbing Contractors LLC | 4.5★ (2) | 17 mi |
| Wrangler Plumbing & Heating | 5.0★ (2) | 15 mi |
How much do plumbers cost in Londontowne?
National price ranges in USD, not adjusted for Londontowne. 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 Londontowne plumbers
We scored 402 Londontowne 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 Londontowne 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 Londontowne: frequently asked questions
Who is the best plumber in Londontowne?
By CR Score, the highest-ranked plumber in Londontowne, MD is Howard Plumbing with a CR Score of 91/100. It has 4.9★ from 521 Google reviews. It is open 24/7. Roto-Rooter Plumbing & Water Cleanup (#2) and Catons Plumbing, Drains & Water Cleanup (#3) follow. We ranked 402 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in Londontowne?
ContractorsRanked ranks 402 plumbers serving Londontowne, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which plumbers in Londontowne are open 24/7?
144 ranked plumbers in Londontowne post 24/7 hours. The highest-ranked are Howard Plumbing (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Catons Plumbing, Drains & Water Cleanup (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in Londontowne work on weekends?
250 of 402 ranked plumbers post Saturday hours and 177 post Sunday hours. The highest-ranked open Saturdays are Howard Plumbing (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Catons Plumbing, Drains & 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 Londontowne?
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 Londontowne. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Londontowne plumbers have?
The median Google rating among 402 rated plumbers in Londontowne is 4.9★, with a median of 28 reviews. Len The Plumber Heating & Air, LLC has the most, 15,911 reviews, and ranks #8. 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 Londontowne
- October 2026: CR Scores recalculated for 402 plumbers serving Londontowne.
- October 2026: 1 duplicate listing merged.
More plumbers and Londontowne pages
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