There are many types of home building extensions, but the most common are a garage, a porch, and a patio. A garage is an extension that is attached to the main house and can be used for storage or as a workshop.For More Info:-https://ursads.com/0/posts/3-Services/27-Other/126241-Dunedin-new-builds.htmlhttps://www.sb2build.co.nz/house-builders-dunedin