Each custome home is unique and one of a kind. The cost per square foot all depends. There are several factors involved, paricularly, location, materials, licenseing, Permits, equipment rental, insurance, labor, slope, distance from supplyers, availabilty of skilled labor, choice of Contractor, etc. I use a Home Value estimator to estimate the replacement cost of each home. Usually $150/Sq ft for a standard track home. I estimate $150-300/Sq Ft for a "custome" home.