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ContractorsRanked

Best Plumbers in Chelmsford, MA (2026)

789 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Chelmsford: Eric C. Foster Plumbing Heating & Cooling Inc., CR Score 93/100; 4.9★ from 619 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Roto-Rooter Plumbing & Water Cleanup, posts 24/7 hours; ranked #2 of 789.

  3. 33

    Most-reviewed: Papalia Home Services, 3,978 Google reviews at 4.9★, the most of 789 ranked; ranked #33.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

789 Chelmsford plumbers are ranked here by CR Score, from 8 published factors. 265 are open 24/7, 440 open Saturdays and 343 open Sundays, based on posted hours. The median Google rating is 4.9★ across 789 rated businesses.

Top 10 plumbers in Chelmsford at a glance

Top 10 plumbers in Chelmsford at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Eric C. Foster Plumbing Heating & Cooling Inc.934.9★ (619)Chelmsford24/7Overall
2Roto-Rooter Plumbing & Water Cleanup914.8★ (1,146)Lowell, 4 mi away24/7Emergencies
3Sam Sean Plumbing and Heating, LLC904.9★ (137)Chelmsford24/7—
4Skill Pro Services - Plumbing & Gas-Fitting905.0★ (222)Pinehurst, 6 mi away24/7—
5MillTown Plumbing, Heating, Cooling and Electrical904.8★ (2,927)Chelmsford24/7—
6Dale Plumbing Services Inc.905.0★ (226)Tewksbury, 7 mi away24/7—
7John's Sewer & Drain Cleaning904.9★ (796)Woburn, 12 mi away24/7—
8Rescue Plumbing Services905.0★ (111)Westford, 4 mi away24/7—
9128 Plumbing, Heating, Cooling & Electric895.0★ (443)Chelmsford24/7—
10Dees Plumbing and Heating895.0★ (113)Dracut, 6 mi away24/7—

The 789 best plumbers in Chelmsford, 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.

  16. #16 Chevron Plumbing

    Based in Burlington, 10 mi away

    88/100CR Score

    Ranked #16 because of its Google rating and availability: 4.9★ from 176 Google reviews, open 24/7.

    • 4.9★ from 176 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5 Grant Ave, Burlington, MA 01803
    View profile for Chevron Plumbing(781) 999-4987

  17. #17 Plumr

    Based in North Andover, 14 mi away

    88/100CR Score

    Ranked #17 because of its Google rating and availability: 4.9★ from 286 Google reviews, open 24/7.

    • 4.9★ from 286 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8 Marblehead St B, North Andover, MA 01845
    View profile for Plumr(781) 606-5200

  24. #24 Rooter Man

    Based in Lawrence, 13 mi away

    87/100CR Score

    Ranked #24 because of its Google rating and availability: 5.0★ from 118 Google reviews, open 24/7.

    • 5.0★ from 118 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    46 Portland St, Lawrence, MA 01843
    View profile for Rooter Man(978) 686-2214

  25. #25 Sewer Bros.

    Based in Andover, 16 mi away

    87/100CR Score

    Ranked #25 because of its Google rating and availability: 5.0★ from 172 Google reviews, open 24/7.

    • 5.0★ from 172 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Sewer Bros.(978) 778-6672

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 789 ranked plumbers here; the rest are on their profiles.

plumbers in Chelmsford, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26128 Plumbing, Heating, Cooling & Electric874.9★ (3,912)17 mi
27CSB Plumbing Co.874.9★ (80)9 mi
28Mystic Valley Home Services875.0★ (131)15 mi
29Midtowne Plumbing & Heating874.8★ (47)5 mi
30Denommee Plumbing, HVAC & Electric864.7★ (427)In Chelmsford
31Accurate Baker Elman864.9★ (552)23 mi
32Fitz Just Right Plumbing865.0★ (36)8 mi
33Papalia Home Services864.9★ (3,978)10 mi
34Mark A Mignacca plumbing and heating865.0★ (40)4 mi
35Chantz Mello Plumbing and Heating865.0★ (20)In Chelmsford
36JLB Plumbing & Mechanical, LLC864.9★ (143)17 mi
37Ari's Pro Drain Cleaning864.9★ (108)15 mi
38Roto-Rooter Plumbing & Water Cleanup864.8★ (451)21 mi
39J.Sar Plumbing & Heating LLC865.0★ (189)4 mi
40Hometown Plumbing865.0★ (25)8 mi
41128 Plumbing, Heating, Cooling & Electric865.0★ (562)14 mi
42All Out Services865.0★ (47)13 mi
43Capeless Plumbing & Heating855.0★ (31)11 mi
44Gideon Plumbing Services855.0★ (29)10 mi
45Falite Bros., Inc.854.7★ (225)17 mi
46Priority Plumbing854.9★ (149)20 mi
47Monroe Home Solutions854.7★ (340)20 mi
48Waldman Plumbing & Heating854.8★ (450)24 mi
49Opus Plumbing and Heating LLC855.0★ (8)4 mi
50Precision Plumbing Solutions855.0★ (49)16 mi

Also serving Chelmsford

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.

Unranked plumbers serving Chelmsford
BusinessGoogle ratingDistance
A1 Plumbing Service5.0★ (2)6 mi
Addario's Plumbing, Heating, Cooling & Electrical Services4.6★ (2,076)12 mi
Aquino Home Solutions5.0★ (26)In Chelmsford
BMC CORP3.0★ (2)7 mi
Bosinger PlumbingIn Chelmsford
Boston Bob's Home Improvement5.0★ (2)9 mi
Burlington Plumbing & Heating3.0★ (2)5 mi
CHB Excavating, Inc.3.0★ (2)5 mi
Dracut Plumbing & Heating3.0★ (2)8 mi
Drainco4.5★ (2)In Chelmsford
Eric C. Shaw Mechanical5.0★ (16)In Chelmsford
Harley Weymouth Plumbing & Heating5.0★ (2)9 mi
HARVARD PLUMBING & HEATING5.0★ (2)2 mi
Hassan Plumbing & HeatingIn Chelmsford
J. Griffin Heating & Plumbing Inc5.0★ (643)13 mi
James Gardner Plumbing & Heating LLC5.0★ (2)9 mi
Leo the PlumberIn Chelmsford
Mahoney Plumbing & Heating5.0★ (2)3 mi
Suprex Construction5.0★ (66)In Chelmsford
Tyngsboro Plumbing & Heating5.0★ (2)4 mi

How much do plumbers cost in Chelmsford?

National price ranges in USD, not adjusted for Chelmsford. Each row names its basis and the month we checked it.

How much do plumbers cost in Chelmsford?
JobLowTypicalHighBasisChecked
Water heater replacement$882$1,348$1,826Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026

How to check a plumber's license in Massachusetts

In Massachusetts, Massachusetts Board of State Examiners of Plumbers and Gas Fitters licenses Plumbing work: water supply, drain, waste and vent piping and fixtures.

  1. Check that the status is active and the name matches the contract or truck.
  2. 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 Chelmsford plumbers

We scored 789 Chelmsford 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Chelmsford data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Plumbers in Chelmsford: frequently asked questions

Who is the best plumber in Chelmsford?

By CR Score, the highest-ranked plumber in Chelmsford, MA is Eric C. Foster Plumbing Heating & Cooling Inc. with a CR Score of 93/100. It has 4.9★ from 619 Google reviews. It is open 24/7. Roto-Rooter Plumbing & Water Cleanup (#2) and Sam Sean Plumbing and Heating, LLC (#3) follow. We ranked 789 plumbers on 8 factors, last updated October 22, 2026.

How many plumbers are there in Chelmsford?

ContractorsRanked ranks 789 plumbers serving Chelmsford, MA. 7 of them are based in Chelmsford; 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 Chelmsford are open 24/7?

265 ranked plumbers in Chelmsford post 24/7 hours. The highest-ranked are Eric C. Foster Plumbing Heating & Cooling Inc. (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Sam Sean Plumbing and Heating, LLC (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which plumbers in Chelmsford work on weekends?

440 of 789 ranked plumbers post Saturday hours and 343 post Sunday hours. The highest-ranked open Saturdays are Eric C. Foster Plumbing Heating & Cooling Inc. (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Sam Sean Plumbing and Heating, LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check a plumber's license in Massachusetts?

In Massachusetts, Massachusetts Board of State Examiners of Plumbers and Gas Fitters handles licensing and covers Plumbing work: water supply, drain, waste and vent piping and fixtures.

How much does water heater replacement cost in Chelmsford?

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 Chelmsford. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Chelmsford plumbers have?

The median Google rating among 789 rated plumbers in Chelmsford is 4.9★, with a median of 19 reviews. Papalia Home Services has the most, 3,978 reviews, and ranks #33. 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 Chelmsford

  1. October 2026: CR Scores recalculated for 789 plumbers serving Chelmsford.
  2. October 2026: 5 duplicate listings merged.

More plumbers and Chelmsford pages

Other trades in Chelmsford