At David Coulson Design, we bring decades of craftsmanship, architectural integrity, and deep local expertise to every project. As a premier design-build firm based in Duncan, BC , we manage your vision seamlessly from the initial sketch to the final handshake. Whether you are planning a spectacular oceanfront home build on the coast, a custom cottage , or a modern west coast style home nestled in the Cowichan landscape, our integrated team handles every detail with precision. We are more than just designers; we are a full-service residential general contractor trusted across Vancouver Island for exceptional execution. Serving Duncan and the surrounding Cowichan Valley communities, our expertise spans from breaking ground on new projects to operating as one of the region’s premier home renovation companies .