We do provide a slab plan, however, the structural foundation plan is to be provided by the structural engineer selected by your builder or yourself. This is done because our slab plan cannot anticipate the variations in soil, footings and other conditions per your specific site. We provide the design of the roof as well, however, the truss layouts need to be provided by a truss engineer or your lumber company. Your builder can provide these contacts for you.  Please keep in mind that these are additional expenses outside of the cost of the original plan that you purchase from us.