convert a single family into a duplex

[Imran Malik]

hi i am new to bigger pockets, so still trying to get a feel for everything and getting used to moving around on the site, but i do have question , a friend of mine is selling his single family house in fort worth texas , it needs quite a bit of work but who do i call or what department in that city to find out if that house can be turned into a duplex and are their any fees from the city involved, would appreciate any helpful info i can get , i was thinking of step 1- finding out if i can legally convert that house into a duplex

 step 2- get a house inspection

step 3- get a contractors estimate of converting into a duplex

step 4- negotiate a price with the seller

step 5- only proceed if the number are right after crunching in the bigger pocket tools