Best Plumbers in Markham, Ontario
The most trusted plumber in Markham, Ontario is Dima Plumbing, with a ProScore of 78/100.
The most trusted plumber in Markham, Ontario is Dima Plumbing, with a ProScore of 78/100. ProScore has verified 20 plumbers in Markham, scoring each across 10+ data sources and 20+ trust signals. 4 of the 20 are Trusted-tier (65+) or higher.
Last updated: June 20, 2026 · Data refreshed daily
Of 20 plumbers in Markham: 0 rated Elite (80+), 4 rated Trusted (65+), and 9 rated Good (50+).
How ProScore Ranks Plumbers
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 →Frequently Asked Questions
Who is the best plumber in Markham?
Dima Plumbing has the highest ProScore (78/100) among 20 verified 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 (80+), 4 are Trusted-tier (65+), and 9 are Good-tier (50+).
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 5 plumbers in Markham by ProScore, 0 carry active WSIB coverage.
How many verified plumbers are in Markham?
ProScore has verified and scored 20 plumbers in Markham, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Data is refreshed daily.
What's the ProScore distribution among plumbers in Markham?
Among 20 verified plumbers in Markham, Ontario: 0 are Elite-tier (80+), 4 are Trusted-tier (65+), and 9 are Good-tier (50+). The top 5 average a ProScore of 71/100, with Dima Plumbing leading at 78/100.