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Grant Marion Construction logoGrant Marion Construction

Cornwall, ON
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WSIBHCRA Licensed
2 Credentials Verified
ProScore

This score reflects 19 Google reviews, WSIB coverage confirmed.

How is this calculated?
Score updated: Oct 2026

About Grant Marion Construction

AI-generated summary from ProScore data sources

Grant Marion Construction focuses on general contracting work in Cornwall, Ontario and the surrounding region.

  • Grant Marion Construction: one of 8 general contractors in Cornwall.
  • 19 Google reviews (4.5 stars; median 8) for Grant Marion Construction, ahead of 5 of 7 general contractors.
Rated on 1 independent platformProScore found ratings for this business on 1 independent review platform. Each one is listed in "Ratings Across Platforms" below.Government-licensedWSIB coverage confirmed

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What Customers Say

AI analysis of 1 Google review

Top Strengths

Superior build quality
Exceeds expectations
Professional service delivery
superior buildqualityserviceexpectationssatisfaction

Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

1 source · 19 reviews
GoogleListing found
Google Business Profile reviews
4.5/5
19 reviews

No rating yet on Review platform C. Not found on 2 other platforms ProScore checks (Review platform B, BBB).

ProScore aggregates Google, the BBB and other major review platforms. Some sources are not named publicly.

How sources are weighted: ProScore methodology.

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 — confirmed against the register.

Google Review Breakdown

19 total
5
15
4
2
3
0
2
1
1
1

Featured Review

From Google

“

Grant Marion: Superior build, quality, and service, exceeding all expectations. We are extremely satisfied customers.

R
R Reilly
Google Review

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 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 reviews and credentials.

Business Details

2747 Marleau Ave, Cornwall, ON K6H 7B6
General Contractor

Hours

Monday8a.m.-5p.m.
Tuesday8a.m.-5p.m.
Wednesday8a.m.-5p.m.
Thursday8a.m.-5p.m.
Friday8a.m.-5p.m.
SaturdayClosed
SundayClosed

Services Offered

Home renovationsAdditionsNew constructionProject managementPermit acquisitionDesign-build

Services & Info

Onsite services

Service options

Credentials

HCRA Licensed Builder
HCRA Licensed Builder (B731)
✓ Confirmed
Insurance
Not Confirmed
WSIB Coverage
✓ Confirmed

Credentials are as reported by contractors and public sources — verify each with the contractor and the issuing authority before hiring.Check it yourself: WSIB clearance · HCRA Ontario Builder Directory

Data Transparency

Sources
Google and Ontario regulatory records
Score computed
October 13, 2026

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Checked by ProScore

What is the ProScore?

One score from 0 to 100 across every review platform and public registry ProScore checks. How the ProScore works

≥81
Elite
≥70
Trusted
≥54
Good
≥30
Basic
<30
Caution
—
Not yet rated

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Compare General Contractors in Cornwall

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A ProScore is informational only — not a guarantee, endorsement, or recommendation — and the data behind it may be incomplete or out of date. Before hiring, independently verify all credentials, including licences, insurance (including WSIB) and references, directly with the contractor and the issuing authority. Full data notice. Something wrong? Let us know.