One of the most popular ways to off-set the cost of a mortgage is to take on a tenant in a residence and one of the best ways to do this is through a remodeled basement. As Castle Rock Colorado basement finishing can completely remake the interior space of a basement, there are a ton of options for a homeowners who wish to turn their basement into a separate living space. From bathrooms to kitchens to room divisions, basements can offer a significant rental opportunity for a single one-time investment that will also improve the value of the property.