The bigger the porches and garage, the more the living area dollar per sq/ft also goes up. To answer your question, lock and key around my neck of the woods I would guess your looking at around $400-$450k price excluding land cost and site prep not being too big of an issue. Contractor is gonna make 80-100k of that, so anything you can do yourself will save you that much and maybe more. Too many variables to nail down exact costs.
