Plumbers in London
48 plumbers in London with multi-platform trust scores.
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The most trusted plumber in London, Ontario is Mr. Rooter Plumbing of London ON, with a ProScore of 92/100. ProScore has verified 48 plumbers in London, scoring each across 10+ data sources and 20+ trust signals. 5 of the 48 are Trusted-tier (65+) or higher.
Last updated: August 5, 2026 · Data refreshed daily
Of 48 plumbers in London: 3 rated Elite (80+), 28 rated Trusted (65+), and 14 rated Good (50+).
How ProScore Ranks Plumbers
Every plumber in London 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 London?
Mr. Rooter Plumbing of London ON has the highest ProScore (92/100) among 48 verified plumbers in London, 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 London?
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 London, 3 plumbers hold Elite-tier ProScores (80+), 28 are Trusted-tier (65+), and 14 are Good-tier (50+).
Are plumbers in London 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 London by ProScore, 3 carry active WSIB coverage.
How many verified plumbers are in London?
ProScore has verified and scored 48 plumbers in London, 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 London?
Among 48 verified plumbers in London, Ontario: 3 are Elite-tier (80+), 28 are Trusted-tier (65+), and 14 are Good-tier (50+). The top 5 average a ProScore of 82/100, with Mr. Rooter Plumbing of London ON leading at 92/100.