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ContractorsRanked

Best Plumbers in Cos Cob, CT (2026)

1,027 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Cos Cob: Roto-Rooter Plumbing & Water Cleanup, CR Score 91/100; 4.7★ from 2,274 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 1,027.

  3. 9

    Most-reviewed: RR Plumbing Roto-Rooter, 3,823 Google reviews at 4.8★, the most of 1,027 ranked; ranked #9.

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

1,027 Cos Cob plumbers are ranked here by CR Score, from 8 published factors. 414 are open 24/7, 634 open Saturdays and 494 open Sundays, based on posted hours. The median Google rating is 4.8★ across 1,027 rated businesses.

Top 10 plumbers in Cos Cob at a glance

Top 10 plumbers in Cos Cob at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Roto-Rooter Plumbing & Water Cleanup914.7★ (2,274)Stamford, 6 mi away24/7Overall
2Roto-Rooter Plumbing & Water Cleanup904.8★ (1,070)Mamaroneck, 10 mi away24/7Emergencies
3Team ASAP Home Improvement LLC905.0★ (254)Greenburgh, 8 mi away24/7—
4Roto-Rooter Plumbing & Water Cleanup904.8★ (648)White Plains, 9 mi away24/7—
5Clear Drains LLC895.0★ (78)Greenwich, 2 mi away24/7—
61-Tom-Plumber895.0★ (1,133)Farmingdale, 22 mi away24/7—
7A & B Plumbing895.0★ (138)Greenwich, 8 mi away24/7—
8Roto-Rooter Plumbing & Water Cleanup894.8★ (1,574)Yonkers, 17 mi away24/7—
9RR Plumbing Roto-Rooter894.8★ (3,823)Queens Village, 23 mi away24/7Most reviews
10Zoom Drain884.8★ (149)Stamford, 5 mi away24/7—

The 1,027 best plumbers in Cos Cob, 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.

  5. #5 Clear Drains LLC

    Based in Greenwich, 2 mi away

    89/100CR Score

    Ranked #5 because of its Google rating and availability: 5.0★ from 78 Google reviews, open 24/7.

    • 5.0★ from 78 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    19 Edgewood Dr, Greenwich, CT 06831
    View profile for Clear Drains LLC(203) 585-8533

  6. #6 1-Tom-Plumber

    Based in Farmingdale, 22 mi away

    89/100CR Score

    Ranked #6 because of its Google rating and availability: 5.0★ from 1,133 Google reviews, open 24/7.

    • 5.0★ from 1,133 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    52 Central Dr, Farmingdale, NY 11735
    View profile for 1-Tom-Plumber(631) 532-8441

  10. #10 Zoom Drain

    Based in Stamford, 5 mi away

    88/100CR Score

    Ranked #10 because of its Google rating and availability: 4.8★ from 149 Google reviews, open 24/7.

    • 4.8★ from 149 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    130 Lenox Ave, Stamford, CT 06906
    View profile for Zoom Drain(203) 208-6830

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 1,027 ranked plumbers here; the rest are on their profiles.

plumbers in Cos Cob, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Sila Heating, Air Conditioning, Plumbing & Electrical874.8★ (1,821)9 mi
27ABS Plumbing874.9★ (121)12 mi
28Bertola Plumbing & Heating875.0★ (570)25 mi
29JP Plumbing and Sewer875.0★ (130)15 mi
30United Sewer & Water, LLC.875.0★ (31)5 mi
31Dr. Rooter sewer & drain experts875.0★ (287)21 mi
32Roto-Rooter Plumbing & Water Cleanup874.8★ (360)17 mi
33Sal Manzo Plumbing, Heating & Cooling874.8★ (1,390)25 mi
34Roto-Rooter Plumbing & Water Cleanup864.8★ (1,199)24 mi
35Superior Plumbing, Heating, & Mechanical, LLC864.9★ (148)15 mi
36Mr. Rooter Plumbing of Bergen County864.9★ (702)25 mi
37Drain Saver864.9★ (49)8 mi
38Backflow Joe's865.0★ (329)24 mi
39Delta Pipe Repair & Drain Cleaning Corp865.0★ (126)17 mi
40Rooter Man Long Island864.9★ (338)21 mi
41Mr. Plumber864.9★ (219)19 mi
42Perry's Plumbing & Heating, Inc.864.9★ (329)21 mi
43Rodrick Plumbing & Heating865.0★ (35)8 mi
44Valerio Plumbing864.9★ (176)18 mi
45J Rooter Sewer and Drain Cleaning865.0★ (167)20 mi
46GLD Plumbing864.9★ (45)9 mi
47Plumber Pros- White Plains NY865.0★ (35)9 mi
48Roto-Rooter Plumbing & Water Cleanup864.8★ (515)22 mi
49Pipe Wizard864.8★ (478)22 mi
50Royal Sewer&Drain Service LLC865.0★ (16)4 mi

Also serving Cos Cob

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 Cos Cob
BusinessGoogle ratingDistance
Atomic Rooter Plumbing Sewer and Drain Cleaning5.0★ (2)4 mi
Bob Riith Jr Plumbing & Heating5.0★ (2)9 mi
Cipri Plumbing & Heating LLC3.0★ (2)4 mi
Dale Beckmann Plumbing & Heating5.0★ (2)9 mi
Father & Son Plumbing & Heating3.0★ (2)10 mi
Greenwich Landscape Contracting3.0★ (2)5 mi
Grimm’s Plumbing Services LLC5.0★ (51)11 mi
H2O LLCIn Cos Cob
Hot Water Heater RepairIn Cos Cob
J J Sudell Plumbing & HeatingIn Cos Cob
Kevin Simpson Plumbing, LLC.5.0★ (2)10 mi
P. Valenzano & Son5.0★ (2)5 mi
PIPELINE PLUMBING LLC5.0★ (2)11 mi
Premium Sewer & Drain3.0★ (2)7 mi
Richard P Deegan & Son Inc5.0★ (2)11 mi
Sam's Septic Cleaning3.0★ (2)10 mi
Smyth Plumbing, Inc.5.0★ (2)11 mi
Snake The Drain - Plumbing & Drain Services4.9★ (472)20 mi
T.Webber Plumbing, Heating, Air & Electric4.6★ (157)10 mi
Warco Plumbing & Heating Inc5.0★ (2)6 mi

How much do plumbers cost in Cos Cob?

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

How much do plumbers cost in Cos Cob?
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 Connecticut

In Connecticut, Connecticut Department of Consumer Protection licenses Plumbing work: water supply, drain, waste and vent piping and fixtures.

  1. Search the business name or license number on the Connecticut Department of Consumer Protection license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. 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 Cos Cob plumbers

We scored 1,027 Cos Cob 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 Cos Cob 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 Cos Cob: frequently asked questions

Who is the best plumber in Cos Cob?

By CR Score, the highest-ranked plumber in Cos Cob, CT is Roto-Rooter Plumbing & Water Cleanup with a CR Score of 91/100. It has 4.7★ from 2,274 Google reviews. It is open 24/7. Roto-Rooter Plumbing & Water Cleanup (#2) and Team ASAP Home Improvement LLC (#3) follow. We ranked 1,027 plumbers on 8 factors, last updated October 22, 2026.

How many plumbers are there in Cos Cob?

ContractorsRanked ranks 1,027 plumbers serving Cos Cob, CT. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which plumbers in Cos Cob are open 24/7?

414 ranked plumbers in Cos Cob post 24/7 hours. The highest-ranked are Roto-Rooter Plumbing & Water Cleanup (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Team ASAP Home Improvement LLC (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which plumbers in Cos Cob work on weekends?

634 of 1,027 ranked plumbers post Saturday hours and 494 post Sunday hours. The highest-ranked open Saturdays are Roto-Rooter Plumbing & Water Cleanup (#1), Roto-Rooter Plumbing & Water Cleanup (#2) and Team ASAP Home Improvement LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.

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

In Connecticut, Connecticut Department of Consumer Protection handles licensing and covers Plumbing work: water supply, drain, waste and vent piping and fixtures. Search the business or license number at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx.

How much does water heater replacement cost in Cos Cob?

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

What Google rating do Cos Cob plumbers have?

The median Google rating among 1,027 rated plumbers in Cos Cob is 4.8★, with a median of 15 reviews. RR Plumbing Roto-Rooter has the most, 3,823 reviews, and ranks #9. 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 Cos Cob

  1. October 2026: CR Scores recalculated for 1,027 plumbers serving Cos Cob.
  2. October 2026: 6 duplicate listings merged.

More plumbers and Cos Cob pages

Other trades in Cos Cob