I am interested in know if land is zoned for a duplex can I also place a Four plex on that lot. yes you can but you need a use variance or talk to the zoning department about future use overlays or if there is a process. put the effort in and you'll find the answers. developers call the same people you can call. 

While I can't speak to the others on your list, I am an agent with a focus on investment properties if you need help in that department.

We have a phenomenal team that works with every client and department leaders who are authorized to make those calls. 

Department of Housing and Urban Development (HUD) quality standards.Once approved, you can find a tenant who has been granted a Section 8 voucher.

Try to get something in writing from the departing tenant that confirms he has moved out.

I don't see why there should be too many problems with doing something like that except for maybe consider checking with your building department and local zoning if a commercial property is allowed in that particular area that you're residential property currently sits? 

Check the rents and stop by the Police department and share the address, so they can tell you about crime in the area.

Try reaching out to your local building department and ask them if there is a process or procedure for this. 

Your city's planning department will have a form to fill out or other method to communicate with AT&T's Engineering Department.

Starting a conversation up with the local Planning Department about your intended uses is a good place to start that can fill you in on the process or let you know where what you want to do might be acceptable.