Greater Toronto's Specialized General Contractor & Design Build Firm When you work with PDBI, you benefit from our expertise in architectural design, assistance obtaining municipal approvals, full construction services, and building maintenance...all in one place! We specialize in a full range of services, but large or small, each project receives our full attention and care to produce quality results. Our Design-Build approach simplifies the project process for our clients, who need deal with only one representative from the beginning to end, rather than with multiple designers, contractors and trades. We have perform joint-venture liaisons on larger projects when necessary.