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ContractorsRanked

Best Plumbers in Ajax, ON (2026)

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

The short answer

  1. 1

    Best overall in Ajax: Sewer Squad Plumbing, CR Score 93/100; 4.9★ from 1,700 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): 2 Bro's Plumbing, posts 24/7 hours; ranked #2 of 560.

  3. 26

    Most-reviewed: Reliance Heating, Air Conditioning & Plumbing, 10,870 Google reviews at 4.9★, the most of 560 ranked; ranked #26.

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

560 Ajax plumbers are ranked here by CR Score, from 8 published factors. 308 are open 24/7, 441 open Saturdays and 366 open Sundays, based on posted hours. The median Google rating is 4.9★ across 560 rated businesses.

Top 10 plumbers in Ajax at a glance

Top 10 plumbers in Ajax at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Sewer Squad Plumbing934.9★ (1,700)Ajax24/7Overall
22 Bro's Plumbing914.9★ (393)Ajax24/7Emergencies
3Vaillancourt Plumbing & Drains904.9★ (1,375)Oshawa, 14 km away24/7—
4Mr Rooter Plumbing of Ajax-Pickering894.7★ (393)Ajax24/7—
5Mr. Rooter Plumbing of Whitby-Oshawa894.7★ (333)Ajax24/7—
6Marco Plumbing894.8★ (181)Ajax24/7—
7Wrench it Up plumbing and mechanical894.8★ (141)Ajax24/7—
8Enercare884.8★ (1,023)Pickering, 19 km away24/7—
9Fast Lane Plumbing884.9★ (195)Oshawa, 9 km away24/7—
10Jetflo Drain & Waterproofing884.9★ (70)Ajax24/7—

The 560 best plumbers in Ajax, 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.

  6. #6 Marco Plumbing

    Based in Ajax

    89/100CR Score

    Ranked #6 because of its Google rating and availability: 4.8★ from 181 Google reviews, open 24/7.

    • 4.8★ from 181 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2020 Wentworth St, Whitby, ON L1N 9A8
    View profile for Marco Plumbing(905) 619-9700

  8. #8 Enercare

    Based in Pickering, 19 km away

    88/100CR Score

    Ranked #8 because of its Google rating and availability: 4.8★ from 1,023 Google reviews, open 24/7.

    • 4.8★ from 1,023 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Enercare(647) 288-1608

  15. #15 Golding Plumbing

    Based in Pickering, 5 km away

    88/100CR Score

    Ranked #15 because of its Google rating and availability: 4.9★ from 84 Google reviews, open 24/7.

    • 4.9★ from 84 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    Faylee Crescent, Pickering, ON L1V 3B1
    View profile for Golding Plumbing(416) 669-8327

  16. #16 Caldwell Plumbing

    Based in Pickering, 3 km away

    87/100CR Score

    Ranked #16 because of its Google rating and availability: 4.7★ from 130 Google reviews, open 24/7.

    • 4.7★ from 130 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1885 Clements Rd #270, Pickering, ON L1W 3V4
    View profile for Caldwell Plumbing(905) 239-3950

  21. #21 PR Plumbing

    Based in Oshawa, 18 km away

    87/100CR Score

    Ranked #21 because of its Google rating and availability: 4.8★ from 401 Google reviews, open 24/7.

    • 4.8★ from 401 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    957 Grandview St N, Oshawa, ON L1K 2E3
    View profile for PR Plumbing(905) 926-9365

  22. #22 One Call Plumbers

    Based in Scarborough, 16 km away

    87/100CR Score

    Ranked #22 because of its Google rating and availability: 4.9★ from 156 Google reviews, open 24/7.

    • 4.9★ from 156 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    132 Morningside Ave, Scarborough, ON M1E 3C5
    View profile for One Call Plumbers(416) 878-8386

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

plumbers in Ajax, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Reliance Heating, Air Conditioning & Plumbing874.9★ (10,870)28 km
27True Service Plumbing875.0★ (1,062)39 km
28Wrench it Up Plumbing874.8★ (356)20 km
29D.A.M Wright Contractors Inc864.9★ (98)14 km
30Delair Plumbing865.0★ (82)16 km
31Mr. Rooter Plumbing of Scarborough ON864.7★ (479)19 km
32Top Canada plumbing864.9★ (76)11 km
33Call the Plumbing Doctor Inc. & Call the Foundation Doctor Inc.864.8★ (182)16 km
34H2O Plumbers865.0★ (170)24 km
35Enercare864.9★ (8,942)14 km
36PLUMBER ON DEMAND of SCARBOROUGH, ON864.8★ (222)19 km
37Weatherall Plumbing864.9★ (46)In Ajax
38Limcan Certified Heating and Air Conditioning864.8★ (2,979)In Ajax
39Saving Plumbing864.8★ (192)18 km
40Premier Plumbing864.9★ (453)30 km
41Protastic Plumbing Services Inc.865.0★ (15)In Ajax
42PLUMBER ON DEMAND of MARKHAM, ON864.9★ (160)22 km
43Dima Plumbing864.9★ (97)19 km
44Enercare864.8★ (2,085)In Ajax
45Shield Plumbing and Drain865.0★ (12)In Ajax
46True-Tech Plumbing Services865.0★ (44)14 km
47Priority Plumbing & Drains864.8★ (1,771)40 km
48The Great Plumbing Co864.9★ (255)28 km
49CDP Plumbing of Pickering855.0★ (99)4 km
50Drain King Plumbers Toronto854.7★ (2,552)38 km

Also serving Ajax

20 more plumbers within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked plumbers serving Ajax
BusinessGoogle ratingDistance
Axiom Plumbing Services IncIn Ajax
CDN Plumbing5.0★ (2)17 km
D-MAC PLUMBING & DRAINS5.0★ (2)3 km
Durham Region PlumbingIn Ajax
Elevation Plumbing Ltd5.0★ (2)In Ajax
Everest Drain & Plumbing: Oshawa's Local Plumber5.0★ (2)17 km
Fastfixplumbing.incIn Ajax
JA Plumbing and Drain5.0★ (1)In Ajax
Latcham Plumbing ltd.5.0★ (2)9 km
Lundy Plumbing & Heating5.0★ (2)17 km
MAAS Trust Concrete Inc | Construction Company in Whitby & Mississauga | Licensed Master Electrician & Plumber5.0★ (2)10 km
Phil's Contracting / Building & Renovations3.0★ (2)15 km
Pro Desk at RONA+3.0★ (2)3 km
Reliance Heating, Air Conditioning & Plumbing4.7★ (9,158)25 km
Remodel Construction Co4.9★ (31)In Ajax
Silverline Plumbers5.0★ (2)4 km
SMM Electric Inc.In Ajax
Soogrim Home Solutions INC.5.0★ (26)In Ajax
Summerhill plumbing5.0★ (2)17 km
Tag Team Plumbing Inc.In Ajax

How much do plumbers cost in Ajax?

US national ranges converted to CAD, not adjusted for Ajax. Each row names its basis and the month we checked it.

How much do plumbers cost in Ajax?
JobLowTypicalHighBasisChecked
Water heater replacementCA$1,240CA$1,890CA$2,570Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)October 2026

How we ranked Ajax plumbers

We scored 560 Ajax 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 Ajax 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 Ajax: frequently asked questions

Who is the best plumber in Ajax?

By CR Score, the highest-ranked plumber in Ajax, ON is Sewer Squad Plumbing with a CR Score of 93/100. It has 4.9★ from 1,700 Google reviews. It is open 24/7. 2 Bro's Plumbing (#2) and Vaillancourt Plumbing & Drains (#3) follow. We ranked 560 plumbers on 8 factors, last updated October 22, 2026.

How many plumbers are there in Ajax?

ContractorsRanked ranks 560 plumbers serving Ajax, ON. 16 of them are based in Ajax; the rest serve it from nearby towns. Another 20 within 40 km are listed but not ranked yet. Counts are as of October 2026.

Which plumbers in Ajax are open 24/7?

308 ranked plumbers in Ajax post 24/7 hours. The highest-ranked are Sewer Squad Plumbing (#1), 2 Bro's Plumbing (#2) and Vaillancourt Plumbing & Drains (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which plumbers in Ajax work on weekends?

441 of 560 ranked plumbers post Saturday hours and 366 post Sunday hours. The highest-ranked open Saturdays are Sewer Squad Plumbing (#1), 2 Bro's Plumbing (#2) and Vaillancourt Plumbing & Drains (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does water heater replacement cost in Ajax?

Water heater replacement typically costs CA$1,240 to CA$2,570, with CA$1,890 typical (Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)). This is a national range, not adjusted for Ajax. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Ajax plumbers have?

The median Google rating among 560 rated plumbers in Ajax is 4.9★, with a median of 26 reviews. Reliance Heating, Air Conditioning & Plumbing has the most, 10,870 reviews, and ranks #26. 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.

Do plumbers outside Ajax count in this ranking?

Yes, if they are within 40 km of the Ajax city centre, our service radius for plumbers. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.

Update log for Ajax

  1. October 2026: CR Scores recalculated for 560 plumbers serving Ajax.
  2. October 2026: 2 duplicate listings merged.

More plumbers and Ajax pages

Other trades in Ajax