Let me just get this first thought out of the way. If you are renting the property you will need to get permission from the owner first!!! Then you’ll need plans, county permits, you’ll need to check with the county about what codes you have to meet, you do not finish then as the inspector to come. You have to get to a certain point get the inspection, go to the next point get an inspection, so so forth. And pay all the fees. Probably looking at around $8000 to $10,000 for the whole thing.