Single-family price & cost breakdowns for a 20,614 sf lot & 2311 square foot house are:  (a) finished lot cost 21.7%, (b) total construction cost is 59.3%, (c) financing cost 2.1%, (d) overhead & general expenses 5.2%, (e) marketing cost is 1.5%, (f) sales commission 3.3%, (g) profit is 6.8% and total sales price 100%.  These are figures from a 2011 survey by the National Association of Home Builders (NAHB).  Percentages do not change much on the square footage.  MORE TO COME!