If a home office, gym, or bar is not your thing, but you are still looking for a way to overhaul your garage, consider converting your empty garage into an extra bedroom for your home. An extra space to sleep is ideal if you have family members visiting often, teenagers who want more space, or want to start renting out rooms for additional income. Additionally, adding an extra bedroom will increase the value of your home. That being said, converting your garage from a dusty, car storage to a cozy accommodation is a lot of work. Depending on the type of room you want, this project will cost anywhere from $20,000 to $40,000. You may want to hire a professional contractor for some parts of the process as well.