Thanks for the input, but job came to a quick hault when I called the inspection dept. They told me the garage was permitted to be a garage and storage, not for bedrooms etc..
They said it would have to be re-permitted and then that would involve something done about the existing septic tank. Probably won't happen. This property sets right on the lake front and inspector thinks they'll be problems for the homeowner updating his septic tank. Thanks anyway. If it gets done it won't be by me, cause I would have to get a permit. Thanks anyway...