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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.
An estimate is just that: âan estimate;â until a clearer picture of what is being built, by whom, and where, is finalized. Generally, we find the âprice per square footâ rate to be around: 1  $110-$130 per square foot to build a house your own (self build). 2  $160 - $200 per square foot to hire a custom home builder.. Local building permit costs & lay of property: Depending on what municipality/region you build in, pricing for building & development costs can range from as low as $10,000 to $30,000.