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Best Plumbers in London, ON (2026)

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

The short answer

  1. 1

    Best overall in London: Mr. Rooter Plumbing of London ON, CR Score 93/100; 4.8★ from 2,083 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Reliance London Heating, Air Conditioning & Plumbing, posts 24/7 hours; ranked #2 of 120.

  3. 2

    Most-reviewed: Reliance London Heating, Air Conditioning & Plumbing, 12,217 Google reviews at 4.8★, the most of 120 ranked; ranked #2.

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

120 London plumbers are ranked here by CR Score, from 8 published factors. 44 are open 24/7, 63 open Saturdays and 51 open Sundays, based on posted hours. The median Google rating is 4.8★ across 120 rated businesses.

Top 10 plumbers in London at a glance

Top 10 plumbers in London at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Mr. Rooter Plumbing of London ON934.8★ (2,083)London24/7Overall
2Reliance London Heating, Air Conditioning & Plumbing924.8★ (12,217)London24/7Emergencies, Most reviews
3DrainCam Plumbing914.9★ (329)London24/7—
4Jumbo Plumbing914.9★ (318)London24/7—
5London Plumbing904.8★ (332)London24/7—
6Crozier Plumbing895.0★ (59)London24/7—
7Best Plumbing and Drainage Contractors884.8★ (85)London24/7—
8DrainTech Plumbing London884.9★ (56)London24/7—
9Elgin County Plumbing885.0★ (301)St. Thomas, 23 km away24/7—
10Jumbo Plumbing885.0★ (35)London24/7—

The 120 best plumbers in London, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

  3. #3 DrainCam Plumbing

    Based in London

    91/100CR Score

    Ranked #3 because of its Google rating and availability: 4.9★ from 329 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.9★ from 329 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    85 Chester St, St Thomas, ON N5R 1V7
    View profile for DrainCam Plumbing(226) 564-3775

  4. #4 Jumbo Plumbing

    Based in London

    91/100CR Score

    Ranked #4 because of its Google rating and availability: 4.9★ from 318 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.9★ from 318 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    36 St Catharine St unit 3, St Thomas, ON N5P 2V8
    View profile for Jumbo Plumbing(226) 667-3511

  5. #5 London Plumbing

    Based in London

    90/100CR Score

    Ranked #5 because of its Google rating and availability: 4.8★ from 332 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.8★ from 332 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    79 Stanley St, London, ON N6C 1B3
    View profile for London Plumbing(226) 270-0405

  6. #6 Crozier Plumbing

    Based in London

    89/100CR Score

    Ranked #6 because of its Google rating and availability: 5.0★ from 59 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 59 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Crozier Plumbing(519) 878-5785

  9. #9 Elgin County Plumbing

    Based in St. Thomas, 23 km away

    88/100CR Score

    Ranked #9 because of its Google rating and availability: 5.0★ from 301 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 301 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    16 Barrie Blvd #3, St Thomas, ON N5P 4B9
    View profile for Elgin County Plumbing(519) 207-0621

  10. #10 Jumbo Plumbing

    Based in London

    88/100CR Score

    Ranked #10 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
    Address
    510 William St unit 3, London, ON N6B 3E6
    View profile for Jumbo Plumbing(519) 805-2623

  12. #12 Nas Plumbing Inc.

    Based in Kitchener, 16 km away

    87/100CR Score

    Ranked #12 because of its Google rating and availability: 5.0★ from 89 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 89 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Nas Plumbing Inc.(519) 774-1251

  14. #14 Freeman Mechanical

    Based in Ingersoll, 29 km away

    87/100CR Score

    Ranked #14 because of its Google rating and availability: 4.9★ from 358 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.9★ from 358 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    50 Thames St S, Ingersoll, ON N5C 2S9
    View profile for Freeman Mechanical(519) 535-9983

  15. #15 Sobek Plumbing

    Based in London

    86/100CR Score

    Ranked #15 because of its Google rating and availability: 4.6★ from 34 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.6★ from 34 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1155 Commissioners Rd E, London, ON N5Z 4X9
    View profile for Sobek Plumbing(519) 808-1398

  16. #16 D. Andersen Plumbing

    Based in London

    86/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 82 Google reviews, listed on Google as “Plumber”.

    Based on 5 of 8 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 82 Google reviews
    Address
    2324 Hamilton Rd, London, ON N6M 1H6
    View profile for D. Andersen Plumbing(519) 872-7333

  20. #20 Munroe Plumbing co.

    Based in St. Thomas, 23 km away

    86/100CR Score

    Ranked #20 because of its Google rating and availability: 5.0★ from 78 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 78 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    395 Talbot St, St Thomas, ON N5P 1B7
    View profile for Munroe Plumbing co.(382) 577-1447

  21. #21 Iron Horse Plumbing

    Based in London

    85/100CR Score

    Ranked #21 because of its Google rating and availability: 4.4★ from 27 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.4★ from 27 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2345 Brayford Crescent, London, ON N6K 0C4
    View profile for Iron Horse Plumbing(519) 455-4910

  24. #24 London Drain Service

    Based in London

    85/100CR Score

    Ranked #24 because of its Google rating and availability: 4.6★ from 11 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.6★ from 11 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2006 Westchester Bourne, London, ON N6M 1H6
    View profile for London Drain Service(226) 663-8961

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

plumbers in London, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Practical Plumbing Co Ltd854.2★ (16)In London
27Superior Plumbing & Heating of London844.6★ (250)In London
28Total Plumbing Solutions844.9★ (78)26 km
29U Need A Plumber844.1★ (44)In London
30Nova Plumbing Inc.845.0★ (18)14 km
31M & K Heating and Air Conditioning844.6★ (1,614)In London
32PlumbingFX845.0★ (3)In London
33Pope Plumbing (R W Pope & Sons Ltd)844.9★ (36)In London
34Super Drain London845.0★ (26)In London
35Rivulet Plumbing Solutions845.0★ (42)19 km
36A.D Plumbing835.0★ (28)29 km
37George's Plumbing and Heating824.5★ (55)In London
38Top Tier Plumbing Services London825.0★ (7)In London
39Strong plumbing and heating825.0★ (4)In London
40Finan Home Service824.8★ (860)In London
41The Water Guys824.9★ (53)In London
42Superior Plumbing & Heating of Aylmer814.8★ (22)30 km
43Bratchis Plumbing815.0★ (5)In London
44Donaldson Heating and Air Conditioning814.9★ (2,733)In London
45PSI Plumbing814.7★ (10)In London
46Plumbing For Life805.0★ (168)In London
47London Smart Plumbing805.0★ (160)In London
48Luminoso Plumbing Inc - Drain Cleaning and Emergency Plumbers in London805.0★ (14)In London
49Mels Plumbing Inc794.9★ (23)18 km
50Dundee Services794.6★ (20)In London

Also serving London

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 London
BusinessGoogle ratingDistance
Basement Waterproofing Pros4.8★ (9)In London
Bren's PlumbingIn London
Crozier Plumbing of London5.0★ (2)In London
Curney Mechanical Ltd3.7★ (3)In London
D & S Plumbing4.1★ (36)In London
DrainTech Plumbing5.0★ (1)In London
Duke Maintenance5.0★ (2)In London
Elway Electric Ltd.4.9★ (119)In London
Handy Bros. HVAC London (AC and Furnace Repair)4.9★ (536)In London
Hurn Plumbing and Heating4.9★ (23)23 km
John The PlumberIn London
Mech Tech Marketing Inc5.0★ (1)In London
PMD Excavation Construction5.0★ (46)24 km
Sanitary Sewer Cleaning5.0★ (2)In London
Shorty's Plumbing & Bathroom Renovations5.0★ (26)37 km
Superior HVAC Service, Heating & Air Conditioning4.9★ (62)In London
Superior Plumbing & Heating of Ingersoll4.5★ (19)29 km
Taps PlumbingIn London
The 24hr Plumber LondonIn London
W Carey PlumbingIn London

How much do plumbers cost in London?

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

How much do plumbers cost in London?
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 London plumbers

We scored 120 London 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 London 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 London: frequently asked questions

Who is the best plumber in London?

By CR Score, the highest-ranked plumber in London, ON is Mr. Rooter Plumbing of London ON with a CR Score of 93/100. It has 4.8★ from 2,083 Google reviews. It is open 24/7. Reliance London Heating, Air Conditioning & Plumbing (#2) and DrainCam Plumbing (#3) follow. We ranked 120 plumbers on 8 factors, last updated October 22, 2026.

How many plumbers are there in London?

ContractorsRanked ranks 120 plumbers serving London, ON. 38 of them are based in London; 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 London are open 24/7?

44 ranked plumbers in London post 24/7 hours. The highest-ranked are Mr. Rooter Plumbing of London ON (#1), Reliance London Heating, Air Conditioning & Plumbing (#2) and DrainCam Plumbing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which plumbers in London work on weekends?

63 of 120 ranked plumbers post Saturday hours and 51 post Sunday hours. The highest-ranked open Saturdays are Mr. Rooter Plumbing of London ON (#1), Reliance London Heating, Air Conditioning & Plumbing (#2) and DrainCam Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does water heater replacement cost in London?

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

What Google rating do London plumbers have?

The median Google rating among 120 rated plumbers in London is 4.8★, with a median of 32 reviews. Reliance London Heating, Air Conditioning & Plumbing has the most, 12,217 reviews, and ranks #2. 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 London count in this ranking?

Yes, if they are within 40 km of the London 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 London

  1. October 2026: CR Scores recalculated for 120 plumbers serving London.

More plumbers and London pages

Other trades in London