General Contractor Professional

Duo Building Ltd

London, ON

WSIB

+1 519-434-0960 Website

1 Credential Verified

77out of 100

Trusted

ProScore

This score reflects 25 Google reviews, WSIB coverage confirmed.

How is this calculated?

Score updated: Oct 2026

About Duo Building Ltd

AI-generated summary from ProScore data sources

Duo Building Ltd is a general contractor working out of London, Ontario.

Duo Building Ltd: ProScore 77, tied 21st of 61 scored general contractors in London.
25 Google reviews (4.5 stars; median 12) for Duo Building Ltd, ahead of 48 of 60 general contractors.

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What Customers Say

AI analysis of 3 Google reviews

Top Strengths

Exceptional workmanship and attention to detail - described as having 'exceptional knowledge, workmanship and eye for details'

Creative design and planning - 'provided detailed and creative plans' with ability to understand client needs

Well-organized project management - clients noted projects were 'well organized' with knowledgeable and efficient employees

Areas to Watch

Poor initial communication responsiveness - one client reported waiting three weeks without response to email and phone inquiries

Inconsistent communication follow-up despite owner's claimed July 23rd outreach

workmanshipdesign qualityproject organizationattention to detailcommunication gaps

Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

1 source · 25 reviews

GoogleListing found

Google Business Profile reviews

4.5/5

25 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

4.5 star average on Google with 25 reviews.

WSIB Verified

Workplace Safety and Insurance Board coverage confirmed — you're protected.

What Reviews Highlight

Reviews mention: workmanship, design quality, project organization.

Google Review Breakdown

25 total

Featured Review

From Google

“

Amazing, stunning, beautiful are the words coming to my mind when I step through my front door. It looks like a picture out of a magazine. Duo Team you have done an outstanding job from design to finish Many thanks to John & Erin for the help and guidance through the many selection I had to make. A special "thank you" to Spencer whose knowledge, workmanship and eye for details are exceptional. Also thanks for the laughs and keeping my house clean throughout the renovation. Many thanks from a

Erika Palme

Google Review

Photos & Work

1 photo

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Frequently Asked Questions

Is Duo Building Ltd licensed?

Licensing status has not been verified for Duo Building Ltd. Contact them directly to confirm current credentials before hiring.

Does Duo Building Ltd have insurance?

Yes, Duo Building Ltd has verified WSIB (Workplace Safety and Insurance Board) coverage, which protects homeowners from liability if a worker is injured on the job.

What is Duo Building Ltd’s rating?

Duo Building Ltd has a ProScore Trust Score of 77/100 (Trusted), calculated from 1 data source including 25 Google reviews.

Where is Duo Building Ltd located?

Duo Building Ltd is a general contractor serving London, Ontario. You can reach them at +1 519-434-0960. View their full profile on ProScore for reviews and credentials.

Business Details

663 Central Ave, London, ON N5W 3P7

General Contractor

View on Google Maps

Hours

Monday8a.m.-5p.m.

Tuesday8a.m.-5p.m.

Wednesday8a.m.-5p.m.

Thursday8a.m.-5p.m.

Friday8a.m.-4p.m.

SaturdayClosed

SundayClosed

Services Offered

Home renovationsAdditionsNew constructionProject managementPermit acquisitionDesign-build

Services & Info

Accessibility

Wheelchair-accessible parking lot

Credentials

Insurance

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 hiring General Contractor FAQs in London View all guides →

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 London

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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.