Plumbers in Oshawa
22 plumbers in Oshawa with multi-platform trust scores.
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Who is the best plumber in Oshawa, Ontario?
The most trusted plumber in Oshawa, Ontario is Vaillancourt Plumbing & Drains, with a ProScore of 83/100. ProScore has scored 22 plumbers in Oshawa across 10+ data sources and 20+ trust signals. 3 of the 22 are Trusted-tier (70+) or higher.
Trust scores last computed between August 30, 2026 and September 19, 2026.
Which plumbers in Oshawa score highest?
All 22 scored plumbers in Oshawa, ranked by ProScore.
ProScore scores 22 plumbers in Oshawa, and their average score is 62 out of 100. 3 of them reach the Trusted threshold of 70 or higher. 7 are registered with WSIB and 2 hold a TSSA licence. 22 have Google reviews on file — 2,706 reviews in total, and 13 carry a Better Business Bureau rating.
Vaillancourt Plumbing & Drains ranks 1st of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 83 out of 100 (Elite tier). Its score draws on 1,377 Google reviews averaging 4.9 out of 5, 358 reviews on other major review platforms and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
PR Plumbing ranks 2nd of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 80 out of 100 (Trusted tier). Its score draws on 405 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Bill Clarke Plumbing & Heating ranks 3rd of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 74 out of 100 (Trusted tier). Its score draws on 74 Google reviews averaging 4.5 out of 5 and a Better Business Bureau rating of A+. Public records show it is licensed by the TSSA.
Caldwell Plumbing Oshawa ranks 4th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 34 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Hayes Plumbing & Bathroom Renovations ranks 5th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 153 Google reviews averaging 4.3 out of 5 and a Better Business Bureau rating of A+.
Throne Plumbing & Gas Ltd ranks 6th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 35 Google reviews averaging 4.9 out of 5 and 16 reviews on other major review platforms.
Call the Plumbing Doctor Inc. & Call the Foundation Doctor Inc. ranks 7th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 68 out of 100 (Good tier). Its score draws on 183 Google reviews averaging 4.8 out of 5.
Pioneer Plumbing and Heating ranks 8th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 67 out of 100 (Good tier). Its score draws on 16 Google reviews averaging 5.0 out of 5 and 49 reviews on other major review platforms. Its ProScore has risen since the previous recompute.
Dan Gibson Plumber ranks 9th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 40 Google reviews averaging 5.0 out of 5.
Superior Plumbing & Heating of Oshawa ranks 10th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 48 Google reviews averaging 5.0 out of 5.
True-Tech Plumbing Services ranks 11th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 44 Google reviews averaging 5.0 out of 5.
Central Drain Service Inc. ranks 12th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 62 out of 100 (Good tier). Its score draws on 34 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Plumbers Edge Inc. ranks 13th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 60 out of 100 (Good tier). Its score draws on 19 Google reviews averaging 4.7 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB. Its ProScore has risen since the previous recompute.
ProFlow Plumbing Co. ranks 14th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 55 out of 100 (Good tier). Its score draws on 10 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+.
CDP Plumbing of Oshawa ranks 15th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 53 out of 100 (Basic tier). Its score draws on 151 Google reviews averaging 5.0 out of 5.
Free Flo Plumbing LTD. ranks 16th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 55 Google reviews averaging 5.0 out of 5.
Oshawa Plumbing and Sewer ranks 17th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 13 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Lundy Plumbing & Heating ranks 18th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 51 out of 100 (Basic tier). Its score draws on 2 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+.
King Street Plumbing Services Inc. ranks 19th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 49 out of 100 (Basic tier). Its score draws on 1 Google review averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB. Its ProScore has risen since the previous recompute.
Renmar Services ranks 20th of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 49 out of 100 (Basic tier). Its score draws on 7 Google reviews averaging 3.3 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Titan Plumbing ranks 21st of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 48 out of 100 (Basic tier). Its score draws on 4 Google reviews averaging 4.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Goodman W D Plumbing Limited ranks 22nd of the 22 plumbers ProScore scores in Oshawa, holding a ProScore of 46 out of 100 (Basic tier). Its score draws on 1 Google review averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Its ProScore has risen since the previous recompute.
Of 22 plumbers in Oshawa: 1 rated Elite (81+), 2 rated Trusted (70+), and 11 rated Good (54+).
How is a plumber's ProScore calculated?
Every plumber in Oshawa is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing and WSIB), Transparency (online presence and profile completeness), and Sentiment (AI analysis of customer reviews). The result is a ProScore from 0 to 100.
Read the full methodology →Who are the top 3 plumbers in Oshawa?
Browse all plumbers in Oshawa →What else should I check before hiring plumbers in Oshawa?
Frequently Asked Questions
Who is the best plumber in Oshawa?
Vaillancourt Plumbing & Drains has the highest ProScore (83/100) among 22 plumbers in Oshawa, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing, WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy plumber in Oshawa?
Look for plumbers with verified active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In Oshawa, 1 plumber holds Elite-tier ProScores (81+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+).
Are plumbers in Oshawa licensed?
Plumbers in Ontario should hold valid business registration and active WSIB workers compensation coverage. ProScore verifies these credentials for every provider. Of the top 22 plumbers in Oshawa by ProScore, 7 carry active WSIB coverage.
How many plumbers has ProScore scored in Oshawa?
ProScore has scored 22 plumbers in Oshawa, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed between August 30, 2026 and September 19, 2026.
What's the ProScore distribution among plumbers in Oshawa?
Among 22 plumbers in Oshawa, Ontario: 1 is Elite-tier (81+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+). The top 22 average a ProScore of 62/100, with Vaillancourt Plumbing & Drains leading at 83/100.