Best Plumbers in Niagara-on-the-Lake, Ontario
The most trusted plumber in Niagara-on-the-Lake, Ontario is McDowell Drain & Waterproofing, with a ProScore of 62/100.
The most trusted plumber in Niagara-on-the-Lake, Ontario is McDowell Drain & Waterproofing, with a ProScore of 62/100. ProScore has verified 2 plumbers in Niagara-on-the-Lake, scoring each across 10+ data sources and 20+ trust signals. None of the 2 meet the Trusted-tier (65+) threshold yet.
Last updated: June 21, 2026 · Data refreshed daily
How ProScore Ranks Plumbers
Every plumber in Niagara-on-the-Lake 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 →Top Rated Plumbers in Niagara-on-the-Lake
Browse all plumbers in Niagara-on-the-Lake →Frequently Asked Questions
Who is the best plumber in Niagara-on-the-Lake?
McDowell Drain & Waterproofing has the highest ProScore (62/100) among 2 verified plumbers in Niagara-on-the-Lake, 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 Niagara-on-the-Lake?
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 Niagara-on-the-Lake, 0 plumbers hold Elite-tier ProScores (80+), 0 are Trusted-tier (65+), and 1 is Good-tier (50+).
Are plumbers in Niagara-on-the-Lake 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 2 plumbers in Niagara-on-the-Lake by ProScore, 0 carry active WSIB coverage.
How many verified plumbers are in Niagara-on-the-Lake?
ProScore has verified and scored 2 plumbers in Niagara-on-the-Lake, 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 Niagara-on-the-Lake?
Among 2 verified plumbers in Niagara-on-the-Lake, Ontario: 0 are Elite-tier (80+), 0 are Trusted-tier (65+), and 1 is Good-tier (50+). The top 2 average a ProScore of 55/100, with McDowell Drain & Waterproofing leading at 62/100.