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Emergency Plumbers in London, ON (2026)

Top 50 of 111 plumbers, in emergency orderUpdated 0 paid placements in this rankingHow we rank

24 of the 50 plumbers on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

The short answer

  1. 1

    #1 for emergency plumbing in London: Mr. Rooter Plumbing of London ON, open 24/7.

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

Top emergency plumbers in London at a glance

Top emergency plumbers in London at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Mr. Rooter Plumbing of London ON664.8★ (2,083)London24/7
2Reliance London Heating, Air Conditioning & Plumbing644.8★ (12,217)London24/7
3DrainCam Plumbing644.9★ (329)London24/7
4Jumbo Plumbing644.9★ (318)London24/7
5London Plumbing634.8★ (332)London24/7
6Best Plumbing and Drainage Contractors614.8★ (85)London24/7
7Hy-Pro Plumbing & Drain Cleaning of London ON614.6★ (132)London24/7
8Crozier Plumbing615.0★ (59)London24/7
9DrainTech Plumbing London614.9★ (56)London24/7
10Superior Plumbing & Heating of St. Thomas614.6★ (73)London24/7

Call an emergency plumber in London now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency plumbers in London, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 111 is on the plumbers page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  3. #3 DrainCam Plumbing

    Based in London

    64/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.9★ from 329 Google reviews, listed on Google as “Plumber”.

    • 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

    64/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 318 Google reviews, listed on Google as “Plumber”.

    • 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

    63/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.8★ from 332 Google reviews, listed on Google as “Plumber”.

    • 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

  11. #11 Jumbo Plumbing

    Based in London

    61/100CR Score

    Ranked #11 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “Plumber”.

    • 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

  14. #14 Sobek Plumbing

    Based in London

    60/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.6★ from 34 Google reviews, listed on Google as “Plumber”.

    • 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

  17. #17 U Need A Plumber

    Based in London

    59/100CR Score

    Ranked #17 because of its Google rating and trade focus: 4.1★ from 44 Google reviews, listed on Google as “Plumber”.

    • 4.1★ from 44 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    242 Baxter St, London, ON N5W 0A2
    View profile for U Need A Plumber(519) 617-8000

  19. #19 D & S Plumbing

    Based in London

    59/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.1★ from 36 Google reviews, listed on Google as “Plumber”.

    • 4.1★ from 36 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1970 Mallard Rd, London, ON N6H 5L8
    View profile for D & S Plumbing(519) 472-7048

  20. #20 Freeman Mechanical

    Based in Ingersoll, 29 km away

    59/100CR Score

    Ranked #20 because of its Google rating and trade focus: 4.9★ from 358 Google reviews, listed on Google as “Plumber”.

    • 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

Top 50 of 111 plumbers by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

plumbers in London, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Nova Drain & Plumbing Services London595.0★ (8)In London
27Superior Plumbing & Heating of London594.6★ (250)In London
28M & K Heating and Air Conditioning584.6★ (1,614)In London
29Munroe Plumbing co.585.0★ (78)23 km
30Whittaker Water Plumbing585.0★ (67)23 km
31Rivulet Plumbing Solutions585.0★ (42)19 km
32Strong plumbing and heating585.0★ (4)In London
33Nova Plumbing Inc.575.0★ (18)14 km
34Total Plumbing Solutions574.9★ (78)26 km
35PlumbingFX575.0★ (3)In London
36Mels Plumbing Inc574.9★ (23)18 km
37Orzech Heating and Cooling574.8★ (272)In London
38George's Plumbing and Heating574.5★ (55)In London
39A.D Plumbing565.0★ (28)29 km
40Superior Plumbing & Heating of Aylmer554.8★ (22)30 km
41D. Andersen Plumbing535.0★ (82)In London
42Hurn Plumbing and Heating534.9★ (23)23 km
43Basement Waterproofing Pros524.8★ (9)In London
44RS RENOVATIONS524.2★ (6)In London
45Pope Plumbing (R W Pope & Sons Ltd)514.9★ (36)In London
46PMD Excavation Construction515.0★ (46)24 km
47Superior Plumbing & Heating of Ingersoll514.5★ (19)29 km
48Curney Mechanical Ltd473.7★ (3)In London
49Plumbing For Life445.0★ (168)In London
50London Smart Plumbing445.0★ (160)In London

How we ranked emergency plumbers in London

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

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 from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency plumbers in London: questions

Which plumbers in London are open 24/7?

24 on this list post 24/7 hours, including Mr. Rooter Plumbing of London ON, Reliance London Heating, Air Conditioning & Plumbing, DrainCam Plumbing, Jumbo Plumbing and London Plumbing.

Who is ranked #1 for emergency plumbing in London, ON?

Mr. Rooter Plumbing of London ON is #1, with a CR Score of 66 out of 100 on emergency weights.

How are emergency plumbers in London ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 plumbers are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the plumber arrives?

Burst pipe or major leak: shut off the main water valve first. If water reaches outlets or the panel, stay clear and call 911.

How many emergency plumbers here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for London

  1. October 2026: CR Scores recalculated for 111 plumbers serving London.

More emergency and plumbing pages