Basically we want to turn our garage into a one car garage with new cement plus a small attic on top and a one room, small kitchen and bathroom? The garage we have now is pretty much useless it is sliding to one side. Can anyone give me an approximate quote and any references to good contractors i believe we need someone with license to do the job right? I really don’t know how to go about to do this job. I live in redwood city california. Thanks