Grand Design Build At Grand Design Build we can handle the creation of your new Custom Home from start to finish. Our in-house teams of architects, designers, and engineers work together in a seamless collaboration process to create your perfectly imagined custom home down to the finest of details in Toronto and GTA. At Grand Design Build, we offer our clients the highest of quality for their custom builds, home renovations and additions from start to finish in Toronto and GTA. https://www.granddesignbuild.com/services/laneway-housing