For homes with limited lot space, a second-story addition can double your living area—but it'll cost you. This major renovation requires structural reinforcement, and that's often very expensive.

Highlights The typical cost range to build a home addition is between $21,000 and $100,000, with a national average cost of $48,860. The exact cost of a home addition depends on the size of the ...

Bump-Out Addition Costs. On average, expect to pay anywhere from $10,000 to $43,000, with an average of $27,000 for a bump-out addition.The type of house, location, and lot size and shape may ...

Brian Johnson, Home Builders Foundation program director, photographs the walk-in closet in the new accessible addition added to the Hancox home in Broomfield on Friday, Feb. 14, 2025. (Matthew ...