A Trusted Builder As a three-time Homebuilder of the Year nominee, and winner of numerous provincial and municipal awards, DECO continues to push the envelope on design, architecture and service. As a division of the TACC Group of Companies, DECO has the expertise and backing of one of the largest development companies in Ontario while offering a fresh approach to design, and customer experience. Having built iconic communities throughout Ontario, their designs have not only stood out amongst the rest, but have stood the test of time for maximum value.