Custom home builders usually price or "cost out" a project on a "per square foot of livable space". For an example, you may have a 2500 square foot home and you want to get a quote from a builder. He may come back to you with a cost of $120 per square foot or $300,000. It is a good idea to understand what exactly is included in the quote. Does the builder's quote include design, engineering, permits, etc. or is it just for the "sticks and bricks"? Builders report back to Omni Block that our cost, considering all of the cost trade-offs, is very close to typical wood frame construction with stucco. It may be slightly higher with vinyl siding.