What's a "luxury" home? Is it built by a high-end production builder, such as Craftmark, or is it a totally custom home by, say, Sagatov or someone of similar ilk?
As a retired builder, for the latter type of home, the cost per square foot starts at $400.00 and can easily go over $550.00 per square foot. For finish: do you like tumbled limestone, or imported Carrera marble, just for instance? For mechanicals, do you insist on a whole-house ventilation and heat exchanger system, or will you be satisfied with ordinary bath and laundry ventilation systems. For exterior materials, do you insist on, say, polished granite as a moisture barrier between the basement or slab foundation level and whatever you choose as an exterior finish above this level? I know this is not a clear-cut answer, but different people consider different homes to be luxury. To clarify, one final question: do you consider a $2,000,000.00+ 7,500+ square foot home built by Craftmark in Evans Farm to be a luxury home or the highest of high-end production homes?