90/100CR Score
Ranked #1 because of its Google rating and availability: 4.8★ from 2,362 Google reviews, open 24/7.
- 4.8★ from 2,362 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 281 Queen St S, Mississauga, ON L5M 1L9
Best Plumbers in Oakville, ON (2026)
668 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Oakville: Mr Rooter Plumbing of Mississauga ON, CR Score 90/100; 4.8★ from 2,362 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Harb Plumbing, posts 24/7 hours; ranked #2 of 668.
- 9
Most-reviewed: Reliance Heating, Air Conditioning & Plumbing, 27,515 Google reviews at 4.8★, the most of 668 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
668 Oakville plumbers are ranked here by CR Score, from 8 published factors. 365 are open 24/7, 545 open Saturdays and 457 open Sundays, based on posted hours. The median Google rating is 5.0★ across 668 rated businesses.
Top 10 plumbers in Oakville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mr Rooter Plumbing of Mississauga ON | 90 | 4.8★ (2,362) | Mississauga, 14 km away | 24/7 | Overall |
| 2 | Harb Plumbing | 90 | 4.9★ (577) | Mississauga, 9 km away | 24/7 | Emergencies |
| 3 | Drain 1 Plumbers Oakville | 90 | 5.0★ (120) | Oakville | 24/7 | — |
| 4 | ProResults Plumbing Oakville – Residential & Commercial Services | 90 | 5.0★ (117) | Oakville | 24/7 | — |
| 5 | 17 Plumbing & Construction Design Ltd | 90 | 5.0★ (115) | Oakville | 24/7 | — |
| 6 | Atre Drain and Plumbing | 90 | 5.0★ (108) | Oakville | 24/7 | — |
| 7 | John The Plumber | 90 | 4.8★ (280) | Oakville | 24/7 | — |
| 8 | Delex Plumbing and Drains | 89 | 5.0★ (371) | Milton, 13 km away | 24/7 | — |
| 9 | Reliance Heating, Air Conditioning & Plumbing | 89 | 4.8★ (27,515) | Burlington, 13 km away | 24/7 | Most reviews |
| 10 | PlumbingPal | 89 | 5.0★ (160) | Milton, 8 km away | 24/7 | — |
The 668 best plumbers in Oakville, 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 Mississauga, 9 km away
90/100CR ScoreRanked #2 because of its Google rating and availability: 4.9★ from 577 Google reviews, open 24/7.
- 4.9★ from 577 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2400 Dundas St W Unit 6, Mississauga, ON L5K 2R8
Based in Oakville
90/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 120 Google reviews, open 24/7.
- 5.0★ from 120 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 277 Lakeshore Rd E, Oakville, ON L6J 6J3
Based in Oakville
90/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 117 Google reviews, open 24/7.
- 5.0★ from 117 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 775 Pacific Rd Unit 20, Oakville, ON L6L 6M4
Based in Oakville
90/100CR ScoreRanked #5 because of its Google rating and availability: 5.0★ from 115 Google reviews, open 24/7.
- 5.0★ from 115 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 380 Summerchase Dr, Oakville, ON L6H 5T7
Based in Oakville
90/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 108 Google reviews, open 24/7.
- 5.0★ from 108 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2291 Dunedin Rd, Oakville, ON L6J 5V4
Based in Oakville
90/100CR ScoreRanked #7 because of its Google rating and availability: 4.8★ from 280 Google reviews, open 24/7.
- 4.8★ from 280 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2020 Winston Park Dr Unit 104, Oakville, ON L6H 6X7
Based in Milton, 13 km away
89/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 371 Google reviews, open 24/7.
- 5.0★ from 371 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Burlington, 13 km away
89/100CR ScoreRanked #9 because of its Google rating and review volume: 4.8★ from 27,515 Google reviews, the most Google reviews on this list (27,515).
- 4.8★ from 27,515 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 830 Harrington Ct, Burlington, ON L7N 3N4
#10 PlumbingPal
Based in Milton, 8 km away
89/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 160 Google reviews, open 24/7.
- 5.0★ from 160 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Burlington, 16 km away
89/100CR ScoreRanked #11 because of its Google rating and availability: 4.9★ from 541 Google reviews, open 24/7.
- 4.9★ from 541 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Burlington, 10 km away
89/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 299 Google reviews, open 24/7.
- 4.9★ from 299 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5058 Fairview St, Burlington, ON L7L 0B4
Based in Burlington, 5 km away
88/100CR ScoreRanked #13 because of its Google rating and availability: 4.8★ from 190 Google reviews, open 24/7.
- 4.8★ from 190 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Oakville
88/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 178 Google reviews, open 24/7.
- 4.7★ from 178 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1156 Jezero Crescent, Oakville, ON L6H 0B4
Based in Burlington, 13 km away
88/100CR ScoreRanked #15 because of its Google rating and availability: 5.0★ from 176 Google reviews, open 24/7.
- 5.0★ from 176 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3327 Mainway Unit A, Burlington, ON L7M 1A6
Based in Toronto, 30 km away
88/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 1,062 Google reviews, open 24/7.
- 5.0★ from 1,062 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 180 Brock Ave, Toronto, ON M6K 2L6
Based in Burlington, 15 km away
88/100CR ScoreRanked #17 because of its Google rating and availability: 5.0★ from 177 Google reviews, open 24/7.
- 5.0★ from 177 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Mississauga, 20 km away
88/100CR ScoreRanked #18 because of its Google rating and availability: 4.8★ from 20,445 Google reviews, open 24/7.
- 4.8★ from 20,445 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 335 Britannia Rd E, Mississauga, ON L4Z 1X9
Based in Oakville
88/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 36 Google reviews, open 24/7.
- 5.0★ from 36 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- Silver Maple Rd, Oakville, ON L6H 3P4
Based in Milton, 12 km away
88/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 107 Google reviews, open 24/7.
- 5.0★ from 107 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Oakville
87/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 30 Google reviews, open 24/7.
- 5.0★ from 30 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1212 Leewood Dr, Oakville, ON L6L 2G3
Based in Oakville
87/100CR ScoreRanked #22 because of its Google rating and availability: 4.9★ from 36 Google reviews, open 24/7.
- 4.9★ from 36 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 295 Robinson St #100C, Oakville, ON L6J 1G7
Based in Toronto, 22 km away
87/100CR ScoreRanked #23 because of its Google rating and availability: 4.8★ from 844 Google reviews, open 24/7.
- 4.8★ from 844 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 50 Paxman Rd #12, Toronto, ON M9C 1B7
Based in Etobicoke, 25 km away
87/100CR ScoreRanked #24 because of its Google rating and availability: 4.9★ from 643 Google reviews, open 24/7.
- 4.9★ from 643 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3250 Bloor St W #631, Etobicoke, ON M8X 2X9
#25 Mina Plumbing
Based in Milton, 15 km away
87/100CR ScoreRanked #25 because of its Google rating and availability: 5.0★ from 119 Google reviews, open 24/7.
- 5.0★ from 119 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 382 Cavanagh Ln, Milton, ON L9T 8J9
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 668 ranked plumbers here; the rest are on their profiles.
Also serving Oakville
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 |
|---|---|---|
| 17 Plumbing | 5.0★ (1) | In Oakville |
| a Rescue Rooter | 3.0★ (2) | In Oakville |
| Alma Plumbing & Drain Service | 5.0★ (2) | 12 km |
| Clog Control Plumbing Co. | In Oakville | |
| DR Mechanical | 2.2★ (13) | In Oakville |
| DrainWorks Plumbing Oakville | In Oakville | |
| Everglades Plumbing Services | 5.0★ (123) | 15 km |
| ExpressRooter Plumbing | 4.7★ (371) | 18 km |
| Galaxy Plumbing Inc. | 5.0★ (258) | 17 km |
| Guest Plumbing & HVAC Oakville - Commercial & Residential Services | 5.0★ (1) | In Oakville |
| Harb Plumbing | 4.9★ (481) | 21 km |
| Jump Services Inc. | 4.6★ (9) | In Oakville |
| Kolani Kitchen & Bath | 4.8★ (110) | In Oakville |
| Naylor Building Partnerships Inc. | 3.5★ (70) | In Oakville |
| OAK PLUMBING | In Oakville | |
| Plumber Properly Done Oakville | In Oakville | |
| Plumber Rapid Rescue Oakville | 5.0★ (1) | In Oakville |
| Super 5 Drain and Plumbing | 5.0★ (2) | In Oakville |
| valve doctors plumbing | 5.0★ (1) | In Oakville |
| VS Plumbing | In Oakville |
How much do plumbers cost in Oakville?
US national ranges converted to CAD, not adjusted for Oakville. 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 Oakville plumbers
We scored 668 Oakville 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 Oakville 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 Oakville: frequently asked questions
Who is the best plumber in Oakville?
By CR Score, the highest-ranked plumber in Oakville, ON is Mr Rooter Plumbing of Mississauga ON with a CR Score of 90/100. It has 4.8★ from 2,362 Google reviews. It is open 24/7. Harb Plumbing (#2) and Drain 1 Plumbers Oakville (#3) follow. We ranked 668 plumbers on 8 factors, last updated October 22, 2026.
How many plumbers are there in Oakville?
ContractorsRanked ranks 668 plumbers serving Oakville, ON. 16 of them are based in Oakville; 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 Oakville are open 24/7?
365 ranked plumbers in Oakville post 24/7 hours. The highest-ranked are Mr Rooter Plumbing of Mississauga ON (#1), Harb Plumbing (#2) and Drain 1 Plumbers Oakville (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which plumbers in Oakville work on weekends?
545 of 668 ranked plumbers post Saturday hours and 457 post Sunday hours. The highest-ranked open Saturdays are Mr Rooter Plumbing of Mississauga ON (#1), Harb Plumbing (#2) and Drain 1 Plumbers Oakville (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does water heater replacement cost in Oakville?
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 Oakville. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Oakville plumbers have?
The median Google rating among 668 rated plumbers in Oakville is 5.0★, with a median of 34 reviews. Reliance Heating, Air Conditioning & Plumbing has the most, 27,515 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 Oakville count in this ranking?
Yes, if they are within 40 km of the Oakville 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 Oakville
- October 2026: CR Scores recalculated for 668 plumbers serving Oakville.
- October 2026: 5 duplicate listings merged.
More plumbers and Oakville pages
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