Here is what i know about these type of ideas. These are at least the minimum. For a condo split you're looking to 1. Have a "firewall" (fire retardant drywall) all the way up between the units. 2. Each unit has to have separated utilities (water, electric, gas, plumbing). Specifically the waste pipes needs to run into a Y in the yard then to the street. 3. You need an architect to draw up and define each space to change the deed. 4. A lawyer needs to set up a Condo Association and rules, etc. 5.