91/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 482 Google reviews, open 24/7.
- 5.0★ from 482 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17225 Black Rock Rd, Germantown, MD 20874
Best Plumbers in North Potomac, MD (2026)
820 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in North Potomac: MoCo Plumbing, LLC, CR Score 91/100; 5.0★ from 482 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 820.
- 14
Most-reviewed: Len the Plumber Heating & Air, LLC, 6,899 Google reviews at 4.7★, the most of 820 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
820 North Potomac plumbers are ranked here by CR Score, from 8 published factors. 285 are open 24/7, 518 open Saturdays and 398 open Sundays, based on posted hours. The median Google rating is 4.8★ across 820 rated businesses.
Top 10 plumbers in North Potomac at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | MoCo Plumbing, LLC | 91 | 5.0★ (482) | Germantown, 4 mi away | 24/7 | Overall |
| 2 | Roto-Rooter Plumbing & Water Cleanup | 90 | 4.8★ (1,061) | Rockville, 6 mi away | 24/7 | Emergencies |
| 3 | Roto-Rooter Plumbing & Water Cleanup | 89 | 4.8★ (2,719) | Washington, D.C., 14 mi away | 24/7 | — |
| 4 | Roto-Rooter Plumbing & Water Cleanup | 89 | 4.8★ (647) | Sterling, 8 mi away | 24/7 | — |
| 5 | Roto-Rooter Plumbing & Water Cleanup | 89 | 4.8★ (1,211) | Bethesda, 12 mi away | 24/7 | — |
| 6 | Handyman At Your Command | 89 | 4.9★ (296) | Bethesda, 8 mi away | 24/7 | — |
| 7 | Catons Plumbing, Drains & Water Cleanup | 88 | 5.0★ (128) | Germantown, 7 mi away | 24/7 | — |
| 8 | Home Service Doctors | 88 | 4.8★ (2,036) | Fairfax, 16 mi away | 24/7 | — |
| 9 | Clarksburg Plumbing LLC | 88 | 4.8★ (452) | Clarksburg, 9 mi away | 24/7 | — |
| 10 | Straw Hat Plumbers & Drain Services of Germantown | 88 | 5.0★ (87) | Germantown, 6 mi away | 24/7 | — |
The 820 best plumbers in North Potomac, 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 Rockville, 6 mi away
90/100CR ScoreRanked #2 because of its Google rating and availability: 4.8★ from 1,061 Google reviews, open 24/7.
- 4.8★ from 1,061 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 30 Courthouse Sq # 301, Rockville, MD 20850
Based in Washington, D.C., 14 mi away
89/100CR ScoreRanked #3 because of its Google rating and availability: 4.8★ from 2,719 Google reviews, open 24/7.
- 4.8★ from 2,719 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5125 MacArthur Blvd NW Ste 13, Washington, DC 20016
Based in Sterling, 8 mi away
89/100CR ScoreRanked #4 because of its Google rating and availability: 4.8★ from 647 Google reviews, open 24/7.
- 4.8★ from 647 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 46179 Westlake Dr #330, Sterling, VA 20165
Based in Bethesda, 12 mi away
89/100CR ScoreRanked #5 because of its Google rating and availability: 4.8★ from 1,211 Google reviews, open 24/7.
- 4.8★ from 1,211 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4641 Montgomery Ave Ste 518, Bethesda, MD 20814
Based in Bethesda, 8 mi away
89/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 296 Google reviews, open 24/7.
- 4.9★ from 296 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6701 Democracy Blvd Suite 362, Bethesda, MD 20817
Based in Germantown, 7 mi away
88/100CR ScoreRanked #7 because of its Google rating and availability: 5.0★ from 128 Google reviews, open 24/7.
- 5.0★ from 128 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 13238 Executive Park Terrace Ste 1, Germantown, MD 20874
Based in Fairfax, 16 mi away
88/100CR ScoreRanked #8 because of its Google rating and availability: 4.8★ from 2,036 Google reviews, open 24/7.
- 4.8★ from 2,036 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 10560 Main St Suite PS 100, Fairfax, VA 22030
Based in Clarksburg, 9 mi away
88/100CR ScoreRanked #9 because of its Google rating and availability: 4.8★ from 452 Google reviews, open 24/7.
- 4.8★ from 452 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Germantown, 6 mi away
88/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 87 Google reviews, open 24/7.
- 5.0★ from 87 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 13414 Fountain Club Dr, Germantown, MD 20874
Based in Germantown, 8 mi away
88/100CR ScoreRanked #11 because of its Google rating and availability: 5.0★ from 111 Google reviews, open 24/7.
- 5.0★ from 111 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 13505 Deerwater Dr, Germantown, MD 20874
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 Arlington, 15 mi away
88/100CR ScoreRanked #13 because of its Google rating and availability: 4.9★ from 571 Google reviews, open 24/7.
- 4.9★ from 571 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2219 N Columbus St #204, Arlington, VA 22207
Based in Alexandria, 22 mi away
88/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 6,899 Google reviews, open 24/7.
- 4.7★ from 6,899 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6598B Fleet Dr, Alexandria, VA 22310
Based in Alexandria, 22 mi away
87/100CR ScoreRanked #15 because of its Google rating and availability: 4.9★ from 1,720 Google reviews, open 24/7.
- 4.9★ from 1,720 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1727 King St Suite 123, Alexandria, VA 22314
Based in Arlington, 15 mi away
87/100CR ScoreRanked #16 because of its Google rating and availability: 4.9★ from 453 Google reviews, open 24/7.
- 4.9★ from 453 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2219B N Columbus St #304, Arlington, VA 22207
Based in Rockville, 7 mi away
87/100CR ScoreRanked #17 because of its Google rating and availability: 4.7★ from 5,985 Google reviews, open 24/7.
- 4.7★ from 5,985 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 685 Lofstrand Ln, Rockville, MD 20850
Based in Sterling, 11 mi away
87/100CR ScoreRanked #18 because of its Google rating and availability: 4.9★ from 2,958 Google reviews, open 24/7.
- 4.9★ from 2,958 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 104 Carpenter Dr Suite D, Sterling, VA 20164
Based in Reston, 10 mi away
87/100CR ScoreRanked #19 because of its Google rating and availability: 4.9★ from 184 Google reviews, open 24/7.
- 4.9★ from 184 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1900 Campus Commons Dr Ste 105, Reston, VA 20191
Based in Silver Spring, 12 mi away
87/100CR ScoreRanked #20 because of its Google rating and availability: 4.8★ from 417 Google reviews, open 24/7.
- 4.8★ from 417 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2600 Forest Glen Rd suite a, Silver Spring, MD 20910
Based in Falls Church, 16 mi away
87/100CR ScoreRanked #21 because of its Google rating and availability: 4.9★ from 467 Google reviews, open 24/7.
- 4.9★ from 467 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7139 Noland Rd, Falls Church, VA 22042
Based in Springfield, 19 mi away
87/100CR ScoreRanked #22 because of its Google rating and availability: 4.8★ from 1,503 Google reviews, open 24/7.
- 4.8★ from 1,503 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5325 Port Royal Rd #101, Springfield, VA 22151
Based in Dale City, 15 mi away
87/100CR ScoreRanked #23 because of its Google rating and availability: 5.0★ from 206 Google reviews, open 24/7.
- 5.0★ from 206 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Gaithersburg, 11 mi away
87/100CR ScoreRanked #24 because of its Google rating and availability: 4.9★ from 165 Google reviews, open 24/7.
- 4.9★ from 165 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9815 Watkins Rd, Gaithersburg, MD 20882
Based in Gainesville, 18 mi away
87/100CR ScoreRanked #25 because of its Google rating and availability: 4.9★ from 498 Google reviews, open 24/7.
- 4.9★ from 498 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 820 ranked plumbers here; the rest are on their profiles.
Also serving North Potomac
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 |
|---|---|---|
| AR Mechanical Service | In North Potomac | |
| changepro USA | 1.0★ (2) | 10 mi |
| Classic Drainage Inc. | 5.0★ (2) | 11 mi |
| Dave Foote Plumbing | 3.0★ (2) | 13 mi |
| DMV Plumbing Services | 5.0★ (2) | 11 mi |
| H Plumbing Inc. | 5.0★ (2) | 9 mi |
| Hill's Home & Hearth | 5.0★ (2) | 9 mi |
| Home Services at The Home Depot | 1.0★ (2) | 8 mi |
| Home Services at The Home Depot | 3.5★ (2) | 8 mi |
| Juica's Plumbing | In North Potomac | |
| Len The Plumber Heating & Air, LLC | 4.6★ (8,136) | 14 mi |
| Myers Plumbing Services Germantown MD | 5.0★ (2) | 8 mi |
| P W Scholl Plumbing & Heating Inc | 5.0★ (2) | 11 mi |
| Problem Solvers Plumbing | 5.0★ (50) | 11 mi |
| Rocket Rooter Plumbing | 3.0★ (2) | 3 mi |
| Rogers Plumbing | 3.0★ (2) | 13 mi |
| S.L. Johnson Plumbing & Heating | 3.0★ (2) | 6 mi |
| Silva Marble & Tile | 5.0★ (30) | In North Potomac |
| TechStar Services | 5.0★ (2) | 14 mi |
| W H Lewis & Co | In North Potomac |
How much do plumbers cost in North Potomac?
National price ranges in USD, not adjusted for North Potomac. 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 North Potomac plumbers
We scored 820 North Potomac 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 North Potomac 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 North Potomac: frequently asked questions
Who is the best plumber in North Potomac?
By CR Score, the highest-ranked plumber in North Potomac, MD is MoCo Plumbing, LLC with a CR Score of 91/100. It has 5.0★ from 482 Google reviews. It is open 24/7. Roto-Rooter Plumbing & Water Cleanup (#2) and Roto-Rooter Plumbing & Water Cleanup (#3) follow. We ranked 820 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in North Potomac?
ContractorsRanked ranks 820 plumbers serving North Potomac, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which plumbers in North Potomac are open 24/7?
285 ranked plumbers in North Potomac post 24/7 hours. The highest-ranked are MoCo Plumbing, LLC (#1), Roto-Rooter Plumbing & Water Cleanup (#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 North Potomac work on weekends?
518 of 820 ranked plumbers post Saturday hours and 398 post Sunday hours. The highest-ranked open Saturdays are MoCo Plumbing, LLC (#1), Roto-Rooter Plumbing & Water Cleanup (#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 North Potomac?
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 North Potomac. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do North Potomac plumbers have?
The median Google rating among 820 rated plumbers in North Potomac is 4.8★, with a median of 32 reviews. Len the Plumber Heating & Air, LLC has the most, 6,899 reviews, and ranks #14. 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 North Potomac
- October 2026: CR Scores recalculated for 820 plumbers serving North Potomac.
- October 2026: 6 duplicate listings merged.
More plumbers and North Potomac pages
Plumbers near North Potomac
- Plumbers in Travilah, MD844 ranked
- Plumbers in Darnestown, MD791 ranked
- Plumbers in Gaithersburg, MD805 ranked
- Plumbers in Potomac, MD881 ranked
- Plumbers in Rockville, MD862 ranked
- Plumbers in Germantown, MD658 ranked
- Plumbers in Montgomery Village, MD715 ranked
- Plumbers in Redland, MD837 ranked
- Plumbers in North Bethesda, MD880 ranked
- Plumbers in Poolesville, MD521 ranked
Other trades in North Potomac
- Roofers in North Potomac1492 ranked
- Electricians in North Potomac731 ranked
- HVAC contractors in North Potomac1044 ranked
- General contractors in North Potomac1572 ranked
- Painters in North Potomac361 ranked
- Landscapers in North Potomac347 ranked
- Handymen in North Potomac205 ranked
- Kitchen remodelers in North Potomac1199 ranked
- Bathroom remodelers in North Potomac1184 ranked
- Flooring contractors in North Potomac840 ranked
- Tile installers in North Potomac138 ranked
- Drywall contractors in North Potomac15 ranked
- Concrete contractors in North Potomac337 ranked
- Fence contractors in North Potomac195 ranked
- Deck builders in North Potomac464 ranked
- Siding contractors in North Potomac639 ranked
- Window installers in North Potomac702 ranked
- Gutter installers in North Potomac368 ranked
- Insulation contractors in North Potomac146 ranked
- Solar installers in North Potomac189 ranked
- Garage door repair companies in North Potomac155 ranked
- Foundation repair companies in North Potomac204 ranked
- Tree services in North Potomac347 ranked
- Masonry contractors in North Potomac332 ranked
- Water damage restoration companies in North Potomac855 ranked
- Home builders in North Potomac792 ranked
- Demolition contractors in North Potomac89 ranked
- All contractors in North Potomac