90/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 156 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 156 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best Plumbers in Dover, NH (2026)
112 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Dover: Seacoast Sewer & Drain, Inc., CR Score 90/100; 4.9★ from 156 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Sgt. Smith's Drain Cleaning Services, posts 24/7 hours; ranked #2 of 112.
- 8
Most-reviewed: Heritage Home Service, 2,248 Google reviews at 4.9★, the most of 112 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
112 Dover plumbers are ranked here by CR Score, from 8 published factors. 30 are open 24/7, 42 open Saturdays and 34 open Sundays, based on posted hours. The median Google rating is 4.9★ across 112 rated businesses.
Top 10 plumbers in Dover at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Seacoast Sewer & Drain, Inc. | 90 | 4.9★ (156) | Eliot, 7 mi away | 24/7 | Overall |
| 2 | Sgt. Smith's Drain Cleaning Services | 90 | 4.8★ (196) | Biddeford, 6 mi away | 24/7 | Emergencies |
| 3 | All American Plumbing and Heating | 89 | 4.9★ (58) | Eliot, 4 mi away | 24/7 | — |
| 4 | Backwater Plumbing LLC | 87 | 5.0★ (35) | Eliot, 7 mi away | 24/7 | — |
| 5 | Value Rooter | 87 | 4.8★ (19) | South Berwick, 3 mi away | 24/7 | — |
| 6 | Rooter-Man | 86 | 4.5★ (33) | Eliot, 4 mi away | 24/7 | — |
| 7 | SRV Plumbing and Heating | 86 | 5.0★ (58) | Haverhill, 15 mi away | 24/7 | — |
| 8 | Heritage Home Service | 86 | 4.9★ (2,248) | Hampton, 15 mi away | 24/7 | Most reviews |
| 9 | Advanced Plumbing LLC | 86 | 5.0★ (129) | Auburn, 23 mi away | 24/7 | — |
| 10 | Top Dog Sewer & Drain | 86 | 4.9★ (58) | Chester, 15 mi away | 24/7 | — |
The 112 best plumbers in Dover, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Based in Biddeford, 6 mi away
90/100CR ScoreRanked #2 because of its Google rating and availability: 4.8★ from 196 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.8★ from 196 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Eliot, 4 mi away
89/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 58 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 58 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Eliot, 7 mi away
87/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 35 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 35 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#5 Value Rooter
Based in South Berwick, 3 mi away
87/100CR ScoreRanked #5 because of its Google rating and availability: 4.8★ from 19 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.8★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 86 Oldfields Rd, South Berwick, ME 03908
#6 Rooter-Man
Based in Eliot, 4 mi away
86/100CR ScoreRanked #6 because of its Google rating and availability: 4.5★ from 33 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.5★ from 33 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 814 ME-236, Eliot, ME 03903
Based in Haverhill, 15 mi away
86/100CR ScoreRanked #7 because of its Google rating and availability: 5.0★ from 58 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 58 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Hampton, 15 mi away
86/100CR ScoreRanked #8 because of its Google rating and review volume: 4.9★ from 2,248 Google reviews, the most Google reviews on this list (2,248).
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 2,248 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 179 Lafayette Rd, North Hampton, NH 03862
Based in Auburn, 23 mi away
86/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 129 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 129 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Chester, 15 mi away
86/100CR ScoreRanked #10 because of its Google rating and availability: 4.9★ from 58 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 58 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Barnstable, 14 mi away
85/100CR ScoreRanked #11 because of its Google rating and availability: 5.0★ from 25 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 25 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Chester, 23 mi away
84/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 77 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 77 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#13 Rooter-Man
Based in Exeter, 16 mi away
84/100CR ScoreRanked #13 because of its Google rating and availability: 4.8★ from 23 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.8★ from 23 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 12 Kingston Rd Suite D, Exeter, NH 03833
Based in Dover
83/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
- 4.7★ from 14 Google reviews
- Address
- Dover, NH 03821
Based in Auburn, 24 mi away
83/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 36 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 36 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Newmarket, 9 mi away
82/100CR ScoreRanked #16 because of its Google rating and availability: 4.5★ from 8 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.5★ from 8 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6 Riverbend Rd, Newmarket, NH 03857
Based in Portsmouth, 9 mi away
82/100CR ScoreRanked #17 because of its Google rating and availability: 3.7★ from 31 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 3.7★ from 31 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1250 Woodbury Ave, Portsmouth, NH 03801
Based in Lebanon, 8 mi away
81/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.7★ from 23 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.7★ from 23 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun 9 AM–5 PM
Based in Newmarket, 9 mi away
81/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
- 5.0★ from 11 Google reviews
- Address
- 44 New Rd, Newmarket, NH 03857
#20 Regal Plumbers
Based in Rochester, 9 mi away
80/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 7 Google reviews
- Hours
- Mon–Sun 5 AM–11 PM
- Address
- 17 Wakefield St #2, Rochester, NH 03867
Based in Sandown, 22 mi away
80/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 51 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 5.0★ from 51 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 265 Fremont Rd, Sandown, NH 03873
Based in Biddeford, 25 mi away
80/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 70 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 70 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 35 New Rd, Arundel, ME 04046
Based in Portsmouth, 10 mi away
80/100CR ScoreRanked #23 because of its Google rating and availability: 4.9★ from 45 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.9★ from 45 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 28 Deer St ste 201, Portsmouth, NH 03801
Based in Chester, 23 mi away
80/100CR ScoreRanked #24 because of its Google rating and availability: 4.6★ from 9 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.6★ from 9 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Sandown, 23 mi away
80/100CR ScoreRanked #25 because of its Google rating and availability: 4.3★ from 11 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
- 4.3★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 204 Fremont Rd, Sandown, NH 03873
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 112 ranked plumbers here; the rest are on their profiles.
Also serving Dover
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 |
|---|---|---|
| A P Baker Plumbing & Heating | 5.0★ (2) | 21 mi |
| Brian S Brown Plumbing & Heating | 4.9★ (7) | 25 mi |
| Bruce P Hermenau Plumbing | 4.0★ (2) | 9 mi |
| C.M. Laudani Plumbing & Heating | 5.0★ (5) | 25 mi |
| Dan Rich Plumbing & Heating Co | 2.5★ (2) | 25 mi |
| David Glover Plumbing & Heating | 3.0★ (2) | 12 mi |
| Denis Lamontagne Plumbing & Heating, Inc. | 5.0★ (2) | 18 mi |
| Don-Rite Plumbing & Heating | 3.3★ (11) | 19 mi |
| Farrell Contracting Services, LLC | 5.0★ (2) | 12 mi |
| Jim Tobey Plumbing & Heating | 3.0★ (2) | 17 mi |
| Just Great Plumbing and Heating LLC | 5.0★ (2) | 20 mi |
| Krafton plumbing and heating | 5.0★ (2) | 21 mi |
| Lordbrooks plumbing | 3.0★ (2) | 21 mi |
| Mc Nally & Sons Plumbing & Heating | 5.0★ (2) | 18 mi |
| Palmer and Sicard, Inc. | 3.9★ (20) | 15 mi |
| Ron Berard Plumbing & Heating | 4.3★ (6) | 22 mi |
| Schoolhouse Plumbing | 1.0★ (1) | 10 mi |
| Sunset Plumbing Inc | 5.0★ (1) | 10 mi |
| TAPS Decorative Plumbing | 5.0★ (2) | 15 mi |
| Townsend Energy | 3.7★ (71) | 11 mi |
How much do plumbers cost in Dover?
National price ranges in USD, not adjusted for Dover. 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 New Hampshire
In New Hampshire, New Hampshire Office of Professional Licensure and Certification licenses Plumber licenses (Mechanical Licensing Board).
- 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 Dover plumbers
We scored 112 Dover 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 Dover 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 Dover: frequently asked questions
Who is the best plumber in Dover?
By CR Score, the highest-ranked plumber in Dover, NH is Seacoast Sewer & Drain, Inc. with a CR Score of 90/100. It has 4.9★ from 156 Google reviews. It is open 24/7. Sgt. Smith's Drain Cleaning Services (#2) and All American Plumbing and Heating (#3) follow. We ranked 112 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in Dover?
ContractorsRanked ranks 112 plumbers serving Dover, NH. 1 of them is based in Dover; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which plumbers in Dover are open 24/7?
30 ranked plumbers in Dover post 24/7 hours. The highest-ranked are Seacoast Sewer & Drain, Inc. (#1), Sgt. Smith's Drain Cleaning Services (#2) and All American Plumbing and Heating (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in Dover work on weekends?
42 of 112 ranked plumbers post Saturday hours and 34 post Sunday hours. The highest-ranked open Saturdays are Seacoast Sewer & Drain, Inc. (#1), Sgt. Smith's Drain Cleaning Services (#2) and All American Plumbing and Heating (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check a plumber's license in New Hampshire?
In New Hampshire, New Hampshire Office of Professional Licensure and Certification handles licensing and covers Plumber licenses (Mechanical Licensing Board).
How much does water heater replacement cost in Dover?
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 Dover. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Dover plumbers have?
The median Google rating among 112 rated plumbers in Dover is 4.9★, with a median of 11 reviews. Heritage Home Service has the most, 2,248 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 Dover
- October 2026: CR Scores recalculated for 112 plumbers serving Dover.
- October 2026: 1 duplicate listing merged.
More plumbers and Dover pages
Plumbers near Dover
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Other trades in Dover
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- Electricians in Dover108 ranked
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- General contractors in Dover159 ranked
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- Landscapers in Dover89 ranked
- Handymen in Dover38 ranked
- Kitchen remodelers in Dover71 ranked
- Bathroom remodelers in Dover60 ranked
- Flooring contractors in Dover60 ranked
- Tile installers in Dover12 ranked
- Drywall contractors in Dover6 ranked
- Concrete contractors in Dover33 ranked
- Fence contractors in Dover16 ranked
- Deck builders in Dover34 ranked
- Siding contractors in Dover174 ranked
- Window installers in Dover147 ranked
- Gutter installers in Dover32 ranked
- Insulation contractors in Dover15 ranked
- Solar installers in Dover45 ranked
- Garage door repair companies in Dover23 ranked
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- Tree services in Dover73 ranked
- Masonry contractors in Dover62 ranked
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