General Contractors in Oshawa
3 general contractors in Oshawa with multi-platform trust scores.
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Who is the best general contractor in Oshawa, Ontario?
The most trusted general contractor in Oshawa, Ontario is JJ McGuire General Contractors, with a ProScore of 69/100. ProScore has scored 3 general contractors in Oshawa across 10+ data sources and 20+ trust signals. None of the 3 meet the Trusted-tier (70+) threshold yet.
Trust scores last computed October 13, 2026.
Which general contractors in Oshawa score highest?
All 3 scored general contractors in Oshawa, ranked by ProScore.
ProScore scores 3 general contractors in Oshawa, and their average score is 63 out of 100. 3 have Google reviews on file — 34 reviews in total.
JJ McGuire General Contractors ranks 1st of the 3 general contractors ProScore scores in Oshawa, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 13 Google reviews averaging 4.2 out of 5.
Level General Contracting Inc. ranks 2nd of the 3 general contractors ProScore scores in Oshawa, holding a ProScore of 65 out of 100 (Good tier). Its score draws on 5 Google reviews averaging 5.0 out of 5.
Four Leaf General Contracting ranks 3rd of the 3 general contractors ProScore scores in Oshawa, holding a ProScore of 55 out of 100 (Good tier). Its score draws on 16 Google reviews averaging 4.3 out of 5.
How is a general contractor's ProScore calculated?
Every general contractor in Oshawa is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing where it applies 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 general contractors in Oshawa?
What else should I check before hiring general contractors in Oshawa?
Frequently Asked Questions
Who is the best general contractor in Oshawa?
JJ McGuire General Contractors has the highest ProScore (69/100) among 3 general contractors in Oshawa, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing, including HCRA new-home builder registration where it applies, WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy general contractor in Oshawa?
Look for general contractors with verified active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In Oshawa, 0 general contractors hold Elite-tier ProScores (81+), 0 are Trusted-tier (70+), and 3 are Good-tier (54+).
Are general contractors in Oshawa licensed?
Ontario has no provincial licence for renovation contractors. The HCRA licenses builders of new homes, and a renovation of an existing home typically does not call for an HCRA licence. If you are building a new home, the builder does need one; check it in the HCRA’s Ontario Builder Directory. Some cities license renovation businesses, so check with yours. The regulated work inside the job needs its own licences: an ESA-licensed electrical contractor for wiring, a TSSA-registered contractor for gas, and a certified plumber for plumbing. Ask who does each part and check their numbers.
How many general contractors has ProScore scored in Oshawa?
ProScore has scored 3 general contractors in Oshawa, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed October 13, 2026.
What's the ProScore distribution among general contractors in Oshawa?
Among 3 general contractors in Oshawa, Ontario: 0 are Elite-tier (81+), 0 are Trusted-tier (70+), and 3 are Good-tier (54+). The top 3 average a ProScore of 63/100, with JJ McGuire General Contractors leading at 69/100.
General Contractors near Oshawa
The nearest Ontario cities with a ProScore page for this trade — a pro based nearby may cover your area.
Other trades in Oshawa
Other trades with a ProScore page in Oshawa, with the number of scored pros in each.