Best General Contractors in London, Ontario
The most trusted general contractor in London, Ontario is Core Builders, with a ProScore of 78/100.
The most trusted general contractor in London, Ontario is Core Builders, with a ProScore of 78/100. ProScore has verified 63 general contractors in London, scoring each across 10+ data sources and 20+ trust signals. 3 of the 63 are Trusted-tier (70+) or higher.
Last updated: May 6, 2026 · Data refreshed daily
Of 63 general contractors in London: 0 rated Elite (82+), 3 rated Trusted (70+), and 29 rated Good (55+).
How ProScore Ranks General Contractors
Every general contractor in London is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing including HCRA 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 General Contractors in London
Frequently Asked Questions
Who is the best general contractor in London?
Core Builders has the highest ProScore (78/100) among 63 verified general contractors in London, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing (HCRA), WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy general contractor in London?
Look for general contractors with verified HCRA licensing, active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In London, 0 general contractors hold Elite-tier ProScores (82+), 3 are Trusted-tier (70+), and 29 are Good-tier (55+).
Are general contractors in London licensed?
General Contractors in Ontario are required to hold HCRA licensing. ProScore verifies this against official HCRA records for every provider in our database. Of the top 5 general contractors in London by ProScore, 0 hold verified HCRA credentials and 4 carry active WSIB coverage.
How many verified general contractors are in London?
ProScore has verified and scored 63 general contractors 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 general contractors in London?
Among 63 verified general contractors in London, Ontario: 0 are Elite-tier (82+), 3 are Trusted-tier (70+), and 29 are Good-tier (55+). The top 5 average a ProScore of 71/100, with Core Builders leading at 78/100.