General Contractor Professional
Grant Marion Construction
Cornwall, ON
Compare with similar general contractor providers in Cornwall →WSIBHCRA Licensed
Verified Listing2 Credentials Verified
0out of 100
ProScore
+21 over 1 mo
4.5★ Google|1/4 Sources
This score reflects 19 verified reviews, licensed and verified.
How is this calculated?About Grant Marion Construction
AI-generated summary from verified data sources
Grant Marion Construction is a general contractor serving Cornwall and surrounding communities. They maintain a 4.5★ Google rating across 19 reviews.
Google
4.5★ (19)
Rated on 1 independent platform
Government-licensed
WSIB coverage confirmed
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What Customers Say
AI analysis of 1-2 verified Google reviews
Top Strengths
Superior build quality
Exceeds expectations
Professional service delivery
Performance Breakdown
✨ Quality5.0
👔 Professionalism5.0
🎓 Expertise5.0
superior buildqualityserviceexpectationssatisfaction
Ratings Across Platforms
Aggregated from independent sources. Only ProScore shows all.
G
Google
4.5/5
H
Review Site B
B
BBB
T
Review Site C
The ProScore Trust Score aggregates ratings from all verified sources, weighted by review volume, recency, and platform credibility.
Things to Know
Well Reviewed
4.5 star average on Google with 19 reviews.
WSIB Verified
Workplace Safety and Insurance Board coverage confirmed — you're protected.
HCRA Licensed
Licensed by the Home Construction Regulatory Authority.
Google Review Breakdown
19 total5
15
4
2
3
0
2
1
1
1
Featured Review
Verified review from Google
“
Grant Marion: Superior build, quality, and service, exceeding all expectations. We are extremely satisfied customers.
R
R Reilly
Google Review
Other top rated general contractor in Cornwall
Homeowner Guides
Frequently Asked Questions
Is Grant Marion Construction licensed?
Yes, Grant Marion Construction is registered with HCRA (Home Construction Regulatory Authority), verified by ProScore.
Does Grant Marion Construction have insurance?
Yes, Grant Marion Construction has verified WSIB (Workplace Safety and Insurance Board) coverage, which protects homeowners from liability if a worker is injured on the job.
What is Grant Marion Construction’s rating?
Grant Marion Construction has a ProScore Trust Score of 68/100 (Good), calculated from 1 verified data source including 19 Google reviews.
Where is Grant Marion Construction located?
Grant Marion Construction is a general contractor serving Cornwall, Ontario. You can reach them at +1 613-938-8004. View their full profile on ProScore for verified reviews and credentials.
Data Transparency
SourcesGoogle, multiple verified platforms
Last updated2026-05-06
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Checked by ProScore
What is the ProScore?
The ProScore aggregates ratings from multiple review platforms into a single score from 0 to 100. Unlike platforms that show only their own reviews, the ProScore gives you the complete picture. Scores are capped for providers with limited source verification.
≥82
Elite
≥70
Trusted
≥55
Good
≥30
Basic
<30
Caution
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