Plumbers in Markham
17 plumbers in Markham with multi-platform trust scores.
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Who is the best plumber in Markham, Ontario?
The most trusted plumber in Markham, Ontario is Preferred Plumbing Solutions Inc., with a ProScore of 75/100. ProScore has scored 17 plumbers in Markham across 10+ data sources and 20+ trust signals. 3 of the 17 are Trusted-tier (70+) or higher.
Trust scores last computed September 19, 2026.
Which plumbers in Markham score highest?
All 17 scored plumbers in Markham, ranked by ProScore.
ProScore scores 17 plumbers in Markham, and their average score is 58 out of 100. 3 of them reach the Trusted threshold of 70 or higher. 3 are registered with WSIB. 17 have Google reviews on file — 943 reviews in total, and 8 carry a Better Business Bureau rating.
Preferred Plumbing Solutions Inc. ranks 1st of the 17 plumbers ProScore scores in Markham, holding a ProScore of 75 out of 100 (Trusted tier). Its score draws on 474 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Dima Plumbing ranks 2nd of the 17 plumbers ProScore scores in Markham, holding a ProScore of 74 out of 100 (Trusted tier). Its score draws on 97 Google reviews averaging 4.9 out of 5, 821 reviews on other major review platforms and a Better Business Bureau rating of A+. Its ProScore has fallen since the previous recompute.
Prompt Plumbing ranks 3rd of the 17 plumbers ProScore scores in Markham, holding a ProScore of 72 out of 100 (Trusted tier). Its score draws on 14 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A.
Superior Plumbing & Heating of Markham ranks 4th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 44 Google reviews averaging 4.9 out of 5.
Access Plumbing ranks 5th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 64 out of 100 (Good tier). Its score draws on 47 Google reviews averaging 4.7 out of 5.
Plumber Rapid Rescue ranks 6th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 62 out of 100 (Good tier). Its score draws on 6 Google reviews averaging 5.0 out of 5.
Max Trust Plumbing ranks 7th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 61 out of 100 (Good tier). Its score draws on 5 Google reviews averaging 4.2 out of 5. Its ProScore has risen since the previous recompute.
One Drop Plumbing Ltd ranks 8th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 59 out of 100 (Good tier). Its score draws on 42 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Innovation Plumbing Inc. ranks 9th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 57 out of 100 (Good tier). Its score draws on 40 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB.
Megan-Drew Plumbing & Mechanical ranks 10th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 56 out of 100 (Good tier). Its score draws on 72 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Riva Plumbing Ltd. ranks 11th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 53 out of 100 (Basic tier). Its score draws on 19 Google reviews averaging 3.9 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB.
Markham Plumbing & Mechanical Services ranks 12th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 52 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 C. Its ProScore has risen since the previous recompute.
S & J plumbing ranks 13th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 29 Google reviews averaging 3.3 out of 5 and a Better Business Bureau rating of A+.
Griffiths Plumbing ranks 14th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 50 out of 100 (Basic tier). Its score draws on 5 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Markham Plumbing, Drain Repair & Drain Cleaning Inc ranks 15th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 49 out of 100 (Basic tier). Its score draws on 40 Google reviews averaging 4.6 out of 5.
Reid V A & Sons Plumbing Limited ranks 16th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 47 out of 100 (Basic tier). Its score draws on 6 Google reviews averaging 4.3 out of 5 and a Better Business Bureau rating of A+. Its ProScore has risen since the previous recompute.
10 plus plumbing ranks 17th of the 17 plumbers ProScore scores in Markham, holding a ProScore of 44 out of 100 (Basic tier). Its score draws on 2 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Of 17 plumbers in Markham: 0 rated Elite (81+), 3 rated Trusted (70+), and 7 rated Good (54+).
How is a plumber's ProScore calculated?
Every plumber in Markham 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 Markham?
Browse all plumbers in Markham →What else should I check before hiring plumbers in Markham?
Frequently Asked Questions
Who is the best plumber in Markham?
Preferred Plumbing Solutions Inc. has the highest ProScore (75/100) among 17 plumbers in Markham, 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 Markham?
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 Markham, 0 plumbers hold Elite-tier ProScores (81+), 3 are Trusted-tier (70+), and 7 are Good-tier (54+).
Are plumbers in Markham 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 17 plumbers in Markham by ProScore, 3 carry active WSIB coverage.
How many plumbers has ProScore scored in Markham?
ProScore has scored 17 plumbers in Markham, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed September 19, 2026.
What's the ProScore distribution among plumbers in Markham?
Among 17 plumbers in Markham, Ontario: 0 are Elite-tier (81+), 3 are Trusted-tier (70+), and 7 are Good-tier (54+). The top 17 average a ProScore of 58/100, with Preferred Plumbing Solutions Inc. leading at 75/100.