Typically garage and exterior space is excluded from calculation when pricing new home construction. Does that mean extra 500 sq ft of garage space will cost the same amount as everything else inside the house? No.

For example: 3800 sq ft modern home with triple garage and exterior covered deck can be calculated as 3800 x average $380. Large garage and exterior space such as covered decks is calculated separately and should not be more than $150-$200 per square foot.