A laneway house is a small, detached residential dwelling unit that is typically built in the backyard of an existing property, facing the laneway. In cities like Vancouver, laneway houses can benefit communities by providing affordable housing options, increasing density without large-scale development, promoting sustainable and eco-friendly building practices, and enhancing neighbourhood character and diversity. These types of homes can be a smart investment for homeowners looking to add value to their property while contributing to the community's housing needs.