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General Contractor Professional

Cowan John L Ltd

Dunnville, ON
Compare with similar general contractor providers in Dunnville →
+1 905-774-5751
Serving Dunnville & area
ProScore

This score is based on publicly available data.

How is this calculated?
Score updated: Oct 2026

About Cowan John L Ltd

AI-generated summary from ProScore data sources

Cowan John L Ltd handles general contracting work across Dunnville, Ontario and nearby communities.

  • Cowan John L Ltd: one of 7 general contractors in Dunnville.
Rated on 1 independent platformProScore found ratings for this business on 1 independent review platform. Each one is listed in "Ratings Across Platforms" below.

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Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

1 source · 1 review
GoogleListing found
Google Business Profile reviews
5.0/5
1 review

Not found on 3 other platforms ProScore checks (Review platform B, BBB, Review platform C).

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

How sources are weighted: ProScore methodology.

Google Review Breakdown

1 total
5
1
4
0
3
0
2
0
1
0

Other top rated general contractor in Dunnville

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Ontario Outbuilding
71
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4.8(18)
Amsterdam Contracting Inc
65
Dunnville
5(3)
Bartels Construction and Design
61
Dunnville
5(2)

More general contractors in Dunnville

Frequently Asked Questions

Is Cowan John L Ltd licensed?
Licensing status has not been verified for Cowan John L Ltd. Contact them directly to confirm current credentials before hiring.
Does Cowan John L Ltd have insurance?
WSIB insurance status is not verified for Cowan John L Ltd. Request proof of workplace insurance and liability coverage before hiring.
What is Cowan John L Ltd’s rating?
Cowan John L Ltd has a ProScore Trust Score of 47/100 (Basic), calculated from 1 data source including 1 Google review.
Where is Cowan John L Ltd located?
Cowan John L Ltd is a general contractor serving Dunnville, Ontario. You can reach them at +1 905-774-5751. View their full profile on ProScore for reviews and credentials.

Business Details

110 Brookfield Blvd, Dunnville, ON N1A 2Y4
General Contractor
View on Google Maps

Services Offered

Home renovationsAdditionsNew constructionProject managementPermit acquisitionDesign-build

Services & Info

Accessibility

Wheelchair-accessible parking lot

Credentials

Insurance
Not Confirmed
WSIB Coverage
Not 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

Homeowner Guides

How much does this service cost in Ontario?Red flags when hiringGeneral Contractor FAQs in DunnvilleView all guides →

Data Transparency

Sources
Google
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 Dunnville

See how Cowan John L Ltd ranks against other general contractors in Dunnville on ProScore.

View ranked list of general contractors in Dunnville →

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.