DFW Duplex Construction

[Steve Burt]

I was researching what it might cost to build a duplex or tri on a vacant lot I have a lead on. During this process I did not see many builders on line that appear to specialize in duplexes or tris. Most multifamily specialist seem to focus on apartments.  Is anyone familiar with any reputable firms in the area or have a grasp of cost/sq ft for this type of project?