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About DUO Building

DUO Building specializes in major home renovations and medical office projects in London and surrounding communities. We provide integrated design and professional building services for residential families and commercial businesses.

Since 1979, we have been involved in over a thousand renovation and addition projects on London (and area) homes of every imaginable description, style, and budget. With in-house design professionals, project managers, and carpenters with specific experience and training in renovating old houses, we are uniquely qualified to help you through the complex process of a significant home renovation project from start to finish. Our team has received numerous local, provincial and national awards and acknowledgements for outstanding design and quality and for delivering exceptional customer satisfaction.


What Makes Us Different


Most of our business comes from past customers and referrals. We’ve learned repeatedly, from over four decades in business, that genuinely satisfying our clients is the best possible marketing strategy to sustain and grow our company. We're happy to share references too!

Dedicated Carpenter

Our Lead Carpenter model ensures your project has a dedicated project manager from start to finish. Without the communication breakdowns that can occur when multiple people oversee a project, clients have one point of contact throughout the project.  

A Team of Experts

Our team members are highly trained experts in their respective fields. From our design staff, to our project managers, carpenters and carefully vetted subcontractors, you’ll find that all of them are knowledgeable, courteous and work well together as a team.

Cloud Based Systems

We have a sophisticated cloud-based project management system that clients can access 24/7. Project scheduling details, documents, drawings, files, photos, product information are always up-to-date and available to you at all times.

In-house Design

With our integrated design and build service, we can help our clients create not just a beautiful project - but one that meets your budget. Our four+ decades of working in older homes allows us to account for common challenges to minimize changes in the scope.

Leading 3yr Warranty

We provide an exceptional three-year, no-nonsense warranty on everything we do. In business for over 45 years, clients can trust that we’ll be here to take care of any problems that might arise and schedule regular warranty walkthroughs.

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