At the end of each renovation project, our clients complete a detailed feedback form and rank their experience on a scale of 1 to 10. We take this feedback to heart and share it with our team to constantly improve our customer service.


Great job! Everyone is so pleased with the new office. Thanks for helping us with all the little jobs at both the new and old offices. Jeremy was superb! Especially for such a young person.

Dr. Mark Botsford

London, Ontario

My office looks exactly as I dreamed

At first, we were nervous about the design and construction of my office. However, DUO Building dedicated professionalism, advice, and communication provided me with the best experience with minimal stress. DUO Building exhibited a clear understanding of the role of the Contractor and Architect, both in terms of contract and actual construction. They take care of blueprints, legal forms, and everything necessary to take good care of you. The job was successfully complete with excellent quality and met all timelines that were set. I would not hesitate to recommend DUO Building to any prospective client looking for an experienced and quality design & build and commercial renovations company. I cannot express how thankful I am in words, my office looks exactly as I dreamed it would be!

Dr. Israa Kawi   D.D.S.

London, Ontario

Read what others are saying

We strive very hard to constantly improve and offer the best dental design + build product in London and surrounding area. We’ve built, altered, and renovated dental and medical offices in London, Woodstock, Strathroy, Kitchener, Stratford, Sarnia and Mitchell with amazing results and satisfied clients over our 30+ years. Better yet, read what some of your professional colleagues have said about their experience with us!

DUO understands Dentistry

“DUO Building understands Dentistry and the needs of an efficient office space. Their in- house design team provides a great service to maximize the potential layout options. From initial sketches to final blueprints, they do it all. They went above and beyond expectations to deal with the necessary building permits, legal forms, and financial documents. They take good care of all your needs to allow you to keep doing dentistry and not worry about the project. This was a major renovation and they worked long hours to get done on time. We are very pleased!”

Thank you Duo, Dr. Vic Wagner
London, Ontario

Orthodontic office renovation

“My orthodontic office was renovated by Duo Building in the summer of 2009. The experience of renovating a professional office is challenging on the practice owner and the contractor. Duo definitely met the challenge and met my expectations. I found Duo to be very professional with their work and their schedule. My office was completely renovated and needed to be closed for only two weeks. Duo understands the need to continue to have the office “open” while construction is being completed. The attention to detail and finished product is their forte. I would recommend Pat, John and their team to anyone looking to build or renovate a professional building.”

Dr. Lui Redigonda, Orthodontist
Stratford, Ontario

Dedicated Professionalism

“Words cannot describe my sense of gratification and pride with our new office. Your dedication and professionalism has allowed a dream come true for having the most up to date and modern office in Chatham/Kent. Thanks again and continued success in your design/renovation business.”

Sincerely, Dr. Mark Hare & Staff
Blenheim, Ontario


Family Dentist

“When friends ask who I recommend for renovations, my answer is always Duo Building Ltd. If you want the job done right, with minimal stress and maximum success, Duo is the answer. Their expertise is invaluable in the planning stage, this along with their attention to detail, ensure your happiness with the overall result. Over the last 25 years, they have handled all my renovation projects, including business and home.”

Dr. Giulio Spagnuolo, Family Dentist
London, Ontario

State-of-the-art dental facility

“Over the last 30 years, I have had 4 major dental renovations by Duo. The service has been exceptional, and their knowledge of how we work really helps us make the most of our spatial planning. The follow up and post-reno service is always prompt and perfect, and now we have a state-of-the-art dental facility.”

Thanks guys, Dr. John Demarco
London, Ontario

Always a phone call away

“I first dealt with Duo Building 25 years ago when I opened my practice. They completed my initial construction, and in August 2010, I was fortunate enough to have Duo help with my office renovation. The office was due for a ‘face-lift’ and Duo helped me achieve just that. Knowing that I am a perfectionist, I was given picture board with exactly what to expect as a finished product. Throughout the renovation, their staff was able to any questions with confidence. I felt they were very knowledgeable, experienced, and always ‘a phone call away.’ I am extremely pleased with the end result and would happily recommend Duo Building.”

Dr. Brenda Bunn, Dentist
London, Ontario