The cost of a professional Potomac garage remodeling service will depend on what you want the space would turn out to be, either you want to transform it into an office workspace, a small apartment, or a master bedroom with its own bathroom. There are even more Potomac garage remodeling projects aside from the ones mentioned and the possibilities are endless. You can add new windows and a new entry door to the space but take note that they will affect the cost of the service.