92/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 301 Google reviews, open 24/7.
- 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
Best Plumbers in St. Thomas, ON (2026)
110 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in St. Thomas: Elgin County Plumbing, CR Score 92/100; 5.0★ from 301 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): DrainCam Plumbing, posts 24/7 hours; ranked #2 of 110.
- 9
Most-reviewed: Reliance London Heating, Air Conditioning & Plumbing, 12,217 Google reviews at 4.8★, the most of 110 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
110 St. Thomas plumbers are ranked here by CR Score, from 8 published factors. 47 are open 24/7, 63 open Saturdays and 53 open Sundays, based on posted hours. The median Google rating is 4.8★ across 110 rated businesses.
Top 10 plumbers in St. Thomas at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Elgin County Plumbing | 92 | 5.0★ (301) | St. Thomas | 24/7 | Overall |
| 2 | DrainCam Plumbing | 91 | 4.9★ (329) | London, 1 km away | 24/7 | Emergencies |
| 3 | Jumbo Plumbing | 91 | 4.9★ (318) | London, 1 km away | 24/7 | — |
| 4 | Mr. Rooter Plumbing of London ON | 90 | 4.8★ (2,083) | London, 18 km away | 24/7 | — |
| 5 | Munroe Plumbing co. | 89 | 5.0★ (78) | St. Thomas | 24/7 | — |
| 6 | Total Plumbing Solutions | 89 | 4.9★ (78) | St. Thomas | 24/7 | — |
| 7 | Superior Plumbing & Heating of St. Thomas | 87 | 4.6★ (73) | London, 1 km away | 24/7 | — |
| 8 | Rivulet Plumbing Solutions | 87 | 5.0★ (42) | St. Thomas | 24/7 | — |
| 9 | Reliance London Heating, Air Conditioning & Plumbing | 87 | 4.8★ (12,217) | London, 29 km away | 24/7 | Most reviews |
| 10 | London Plumbing | 86 | 4.8★ (332) | London, 24 km away | 24/7 | — |
The 110 best plumbers in St. Thomas, 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.
Based in London, 1 km away
91/100CR ScoreRanked #2 because of its Google rating and availability: 4.9★ from 329 Google reviews, open 24/7.
- 4.9★ from 329 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 85 Chester St, St Thomas, ON N5R 1V7
Based in London, 1 km away
91/100CR ScoreRanked #3 because of its Google rating and availability: 4.9★ from 318 Google reviews, open 24/7.
- 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
Based in London, 18 km away
90/100CR ScoreRanked #4 because of its Google rating and availability: 4.8★ from 2,083 Google reviews, open 24/7.
- 4.8★ from 2,083 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4474 Blakie Rd # 125, London, ON N6L 1G7
Based in St. Thomas
89/100CR ScoreRanked #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
- 395 Talbot St, St Thomas, ON N5P 1B7
Based in St. Thomas
89/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 78 Google reviews, open 24/7.
- 4.9★ from 78 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 42703 Southdale Line, St Thomas, ON N5R 1C1
Based in London, 1 km away
87/100CR ScoreRanked #7 because of its Google rating and availability: 4.6★ from 73 Google reviews, open 24/7.
- 4.6★ from 73 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 28 Princess Ave, St Thomas, ON N5R 3V4
Based in St. Thomas
87/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 42 Google reviews, open 24/7.
- 5.0★ from 42 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in London, 29 km away
87/100CR ScoreRanked #9 because of its Google rating and review volume: 4.8★ from 12,217 Google reviews, the most Google reviews on this list (12,217).
- 4.8★ from 12,217 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 16025 Robins Hill Rd, London, ON N5V 0C4
#10 London Plumbing
Based in London, 24 km away
86/100CR ScoreRanked #10 because of its Google rating and availability: 4.8★ from 332 Google reviews, open 24/7.
- 4.8★ from 332 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 79 Stanley St, London, ON N6C 1B3
Based in London, 18 km away
85/100CR ScoreRanked #11 because of its Google rating and availability: 4.8★ from 85 Google reviews, open 24/7.
- 4.8★ from 85 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 119 Exeter Rd unit j, London, ON N6L 1A2
#12 Crozier Plumbing
Based in London, 21 km away
85/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 59 Google reviews, open 24/7.
- 5.0★ from 59 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Norfolk County, 24 km away
85/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 67 Google reviews, open 24/7.
- 5.0★ from 67 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Norfolk County, 10 km away
85/100CR ScoreRanked #14 because of its Google rating and availability: 5.0★ from 18 Google reviews, open 24/7.
- 5.0★ from 18 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Ingersoll, 38 km away
85/100CR ScoreRanked #15 because of its Google rating and availability: 4.9★ from 358 Google reviews, open 24/7.
- 4.9★ from 358 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 50 Thames St S, Ingersoll, ON N5C 2S9
Based in Kitchener, 32 km away
84/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 89 Google reviews, open 24/7.
- 5.0★ from 89 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Dorchester, 26 km away
84/100CR ScoreRanked #17 because of its Google rating and availability: 4.8★ from 83 Google reviews, open 24/7.
- 4.8★ from 83 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 30 Woodvale Dr, Dorchester, ON N0L 1G3
Based in Aylmer, 15 km away
84/100CR ScoreRanked #18 because of its Google rating and availability: 4.8★ from 22 Google reviews, open 24/7.
- 4.8★ from 22 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 426 Talbot St W, Aylmer, ON N5H 1K9
#19 Jumbo Plumbing
Based in London, 25 km away
84/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 35 Google reviews, open 24/7.
- 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
Based in London, 24 km away
84/100CR ScoreRanked #20 because of its Google rating and availability: 4.6★ from 132 Google reviews, open 24/7.
- 4.6★ from 132 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 380 Wellington St, London, ON N6A 5B5
Based in Norfolk County, 32 km away
83/100CR ScoreRanked #21 because of its Google rating and availability: 4.9★ from 58 Google reviews, open 24/7.
- 4.9★ from 58 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 54732 Nova Scotia Line, Port Burwell, ON N0J 1T0
Based in London, 32 km away
83/100CR ScoreRanked #22 because of its Google rating and availability: 4.9★ from 56 Google reviews, open 24/7.
- 4.9★ from 56 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20127 Cherry Hill Rd, Thamesford, ON N0M 2M0
#23 Sobek Plumbing
Based in London, 21 km away
83/100CR ScoreRanked #23 because of its Google rating and availability: 4.6★ from 34 Google reviews, open 24/7.
- 4.6★ from 34 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1155 Commissioners Rd E, London, ON N5Z 4X9
Based in St. Thomas
83/100CR ScoreRanked #24 because of its Google rating and availability: 4.9★ from 23 Google reviews, open 24/7.
- 4.9★ from 23 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 258 Edward St, St Thomas, ON N5P 1Z5
Based in London, 20 km away
83/100CR ScoreRanked #25 because of its Google rating and availability: 5.0★ from 28 Google reviews, open 24/7.
- 5.0★ from 28 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
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 110 ranked plumbers here; the rest are on their profiles.
Also serving St. Thomas
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.
| Business | Google rating | Distance |
|---|---|---|
| Allpro Plumbing and Drainage | 5.0★ (1) | In St. Thomas |
| Basement Waterproofing Pros | 4.8★ (9) | 18 km |
| Cam's Heating & Air Cond Inc | 4.7★ (42) | In St. Thomas |
| County Lines HVAC & Fireplaces | 5.0★ (139) | In St. Thomas |
| Crozier Plumbing of London | 5.0★ (2) | 25 km |
| D & S Plumbing | 4.1★ (36) | 29 km |
| d5 Excavating | 5.0★ (2) | 23 km |
| DrainTech Plumbing | 5.0★ (1) | 25 km |
| Duke Maintenance | 5.0★ (2) | 24 km |
| Gastech Solutions Inc. | 4.9★ (491) | In St. Thomas |
| Larry's Asphalt Paving Co Ltd | 5.0★ (1) | 28 km |
| MBH Mechanical | 5.0★ (1) | 37 km |
| Mech Tech Marketing Inc | 5.0★ (1) | 21 km |
| Pro Desk at RONA | In St. Thomas | |
| Sanitary Sewer Cleaning | 5.0★ (2) | 18 km |
| Scott's Home Works | 5.0★ (1) | In St. Thomas |
| Superior Plumbing & Heating of Ingersoll | 4.5★ (19) | 38 km |
| Superior Plumbing & Heating of Tillsonburg | 4.7★ (21) | 38 km |
| The Plumber | 5.0★ (2) | 29 km |
| Waterworks Plumbing Co | In St. Thomas |
How much do plumbers cost in St. Thomas?
US national ranges converted to CAD, not adjusted for St. Thomas. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | CA$1,240 | CA$1,890 | CA$2,570 | 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) | October 2026 |
How we ranked St. Thomas plumbers
We scored 110 St. Thomas 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.
| Factor | Weight | Computed from | In St. Thomas data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
Plumbers in St. Thomas: frequently asked questions
Who is the best plumber in St. Thomas?
By CR Score, the highest-ranked plumber in St. Thomas, ON is Elgin County Plumbing with a CR Score of 92/100. It has 5.0★ from 301 Google reviews. It is open 24/7. DrainCam Plumbing (#2) and Jumbo Plumbing (#3) follow. We ranked 110 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in St. Thomas?
ContractorsRanked ranks 110 plumbers serving St. Thomas, ON. 7 of them are based in St. Thomas; 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 St. Thomas are open 24/7?
47 ranked plumbers in St. Thomas post 24/7 hours. The highest-ranked are Elgin County Plumbing (#1), DrainCam Plumbing (#2) and Jumbo Plumbing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in St. Thomas work on weekends?
63 of 110 ranked plumbers post Saturday hours and 53 post Sunday hours. The highest-ranked open Saturdays are Elgin County Plumbing (#1), DrainCam Plumbing (#2) and Jumbo Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does water heater replacement cost in St. Thomas?
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 St. Thomas. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do St. Thomas plumbers have?
The median Google rating among 110 rated plumbers in St. Thomas is 4.8★, with a median of 34 reviews. Reliance London Heating, Air Conditioning & Plumbing has the most, 12,217 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.
Do plumbers outside St. Thomas count in this ranking?
Yes, if they are within 40 km of the St. Thomas 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 St. Thomas
- October 2026: CR Scores recalculated for 110 plumbers serving St. Thomas.
More plumbers and St. Thomas pages
Plumbers near St. Thomas
- Plumbers in Aylmer, ON123 ranked
- Plumbers in London, ON111 ranked
- Plumbers in Dorchester, ON132 ranked
- Plumbers in Ingersoll, ON145 ranked
- Plumbers in Woodstock, ON127 ranked
- Plumbers in Norfolk County, ON103 ranked
- Plumbers in South Huron, ON26 ranked
- Plumbers in Stratford, ON106 ranked
- Plumbers in Simcoe, ON77 ranked
- Plumbers in Lambton Shores, ON23 ranked
Other trades in St. Thomas
- Roofers in St. Thomas114 ranked
- Electricians in St. Thomas86 ranked
- HVAC contractors in St. Thomas129 ranked
- General contractors in St. Thomas111 ranked
- Painters in St. Thomas52 ranked
- Landscapers in St. Thomas55 ranked
- Handymen in St. Thomas23 ranked
- Kitchen remodelers in St. Thomas79 ranked
- Bathroom remodelers in St. Thomas82 ranked
- Flooring contractors in St. Thomas68 ranked
- Tile installers in St. Thomas18 ranked
- Drywall contractors in St. Thomas9 ranked
- Concrete contractors in St. Thomas75 ranked
- Fence contractors in St. Thomas75 ranked
- Deck builders in St. Thomas75 ranked
- Siding contractors in St. Thomas46 ranked
- Window installers in St. Thomas70 ranked
- Gutter installers in St. Thomas44 ranked
- Insulation contractors in St. Thomas22 ranked
- Solar installers in St. Thomas11 ranked
- Garage door repair companies in St. Thomas27 ranked
- Foundation repair companies in St. Thomas28 ranked
- Tree services in St. Thomas24 ranked
- Masonry contractors in St. Thomas30 ranked
- Water damage restoration companies in St. Thomas67 ranked
- Home builders in St. Thomas98 ranked
- Demolition contractors in St. Thomas15 ranked
- All contractors in St. Thomas