Dear BP Community, Originally from Belgium, I moved to sunny Miami some weeks ago to pursue my degree. 

You might consider speaking to to the City's zoning and building departments where you are located first and confirm whether zoning, setbacks, density, and other requirements will permit you to do this.

Due to this recommendation, the Planning, Design, and Development Department is removing all currently proposed short-term rental regulation language from the draft Unified Development Ordinance (UDO).The City Attorney’s Office will continue to monitor the courts and state legislative activity on the topic of short-term rentals and can work with City Planning Staff on drafting appropriate regulations once the ability of local jurisdictions becomes more clear and certain."

First, confirm the zoning you think it is with zoning department. 

Kendrick, the cost of the design will depend on what your building department requires for permits.

The most useful info you can find is on the NJ Department of Consumer Affairs search for the Landlord-Tenant Handbook. 

And to you, dear readers, STOP falling into these traps.

So, I went to the building department (no internet in those days) found the owner's phone number, called the owner and got my entire deposit back.

If zoning allows 3 families the building department may be able to tell you what modifications it needs to be legal.

The Department of Business and Professional Regulation handles all licensing of real estate brokers,agents, and brokerages.