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Northern Building Contractors logoNorthern Building Contractors

Markham, ON
Compare with similar general contractor providers in Markham →
Serving Markham & area
ProScore

This score reflects 14 Google reviews.

How is this calculated?
Score updated: Oct 2026

About Northern Building Contractors

AI-generated summary from ProScore data sources

Northern Building Contractors is a general contractor based in Markham that operates during weekdays and has wheelchair-accessible parking on site.

  • Northern Building Contractors: ProScore 76, tied 21st of 43 scored general contractors in Markham.
  • 14 Google reviews (4.7 stars; median 13) for Northern Building Contractors, ahead of 24 of 44 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.

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What Customers Say

AI analysis of 3 Google reviews

Top Strengths

Efficient execution and deadline commitment - worked long weekend and prioritized customer deadlines
Strong professional problem-solving - negotiated with manufacturer on parts issue rather than passing costs to customer
Excellent team leadership and communication - described as 'skilled builders and great communicators' trusted with valuable clients
professional teamdeadline-focusedskilled buildersgreat communicatorscustomer commitment

Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

1 source · 14 reviews
GoogleListing found
Google Business Profile reviews
4.7/5
14 reviews

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.

Things to Know

Trusted Level

Scores in ProScore’s Trusted tier — strong, consistent signals across the sources ProScore checks.

Well Reviewed

4.7 star average on Google with 14 reviews.

What Reviews Highlight

Reviews mention: professional team, deadline-focused, skilled builders.

Google Review Breakdown

14 total
5
13
4
0
3
0
2
0
1
1

Featured Review

From Google

“

Great team. They worked the long weekend to get our job done and seriously cared about our deadline and achieving it. They had to come back for a 2nd visit because the manufacturer screwed up parts and worked with the manufacturer not us to make up the extra cost. Truely a professional team. We would highly recommend these folks.

J
Jack and MB Walker
Google Review

Frequently Asked Questions

Is Northern Building Contractors licensed?
Licensing status has not been verified for Northern Building Contractors. Contact them directly to confirm current credentials before hiring.
Does Northern Building Contractors have insurance?
WSIB insurance status is not verified for Northern Building Contractors. Request proof of workplace insurance and liability coverage before hiring.
What is Northern Building Contractors’s rating?
Northern Building Contractors has a ProScore Trust Score of 76/100 (Trusted), calculated from 1 data source including 14 Google reviews.
Where is Northern Building Contractors located?
Northern Building Contractors is a general contractor serving Markham, Ontario. You can reach them at +1 905-477-3605. View their full profile on ProScore for reviews and credentials.

Business Details

1405 Denison St, Markham, ON L3R 5V2
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

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

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 Markham

See how Northern Building Contractors ranks against other general contractors in Markham on ProScore.

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.