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Average Home Building Costs Per Sq Ft: Shell Option. The average home building cost per sq ft for a home is far more uniform than the finished cost per square foot. A shell does not include the foundation, landscaping, fixtures, cabinetry finishes or appliances. Sometimes it does not even include drywall. It usually doesnât include the plumbing or electrical wiring either, though sometimes rough plumbing and wiring are included. The average home building cost per sq ft for a shell is about $25 per square foot with a range of about $22 to $30 per square foot.
Using a cost-per-square-foot measurement will help you make an objective analysis of any home you hope to build. The average building cost per square foot is roughly $80 in the U.S., according to the National Association of Home Builders (NAHB).his home build cost calculator guide will help you identify and account for all the major expenses that go toward building your home. By following this guide you can get a rough estimate of what materials will cost and an idea of the additional expenses you'll need to shell out for contractors and labor in your region.