Hello BP I am a local wholesaler/investor in the metro Atlanta area, with little experience in multi-units. I have a property that is a fire damaged single family and will need to be completely tore down. I want to know what would it take to build a quadriplex on the land? What are the requirements for a 4 unit property? And who in the city can I contact to get all the necessary information. Also I would like to run the numbers with a experienced investor to see if it would be a good deal.

Your first question is zoning. Is the parcel zoned for low density multifamily and if it is, is it how many units can you have on the parcel. To figure that out, talk to zoning department ( bigger cities) or city planner ( smaller cities).  

While you talking to the city, ask them for an architects / builders of the similar type of the property. Ask them to suggest you people they had least amount of problems with.  That's your start. 

Evan,

You typically cannot build a multi-family in and around SFR (single family residences).

 Dan is correct you need to speak with zoning down at the City of Atlanta.

Also BEFORE you tear it down make sure you get the building permit approved for whatever you intend to build back. If the zoning has changed (setbacks, density, etc) then you will be able to put back the same size structure that currently sits there because it's grandfathered in. If you tear it down first and things have changed when you try to obtain the new building permit you are now subject to the new and probably stricter guidelines. This happened to someone I know and he lost his a$$.

Good luck.

Bob