The difference between insulated concrete panels and stick built construction is about a dollar per square foot, and sometimes less. The entire cost of building a home from foundation to shell is about $25 per square foot, with a range of between $21 and $40 per square foot.oodwork and trim also vary in cost depending on the size and degree of detail. Luxury homes can cost over $800 per square foot, depending on the degree of luxury involved. The cost per square foot varies also by the number of bathrooms, and the ratio of bathroom and kitchen space to the rest of the home.