Cost to Build a Home Addition with Basement Garage

Summary: Building a home addition with a garage underneath is a great way to save money on a basement garage.


I have thought about building my own home addition here in NH.

I'm confident that I could build it all myself minus the concrete foundation.

I would like a rough estimate on the cost to build a 26' X 20' home addition with a garage underneath.

Thanks for any help,


Hi George,

Courtesy of CADSmith

If you don't have a sloping lot, I would not put the garage underneath....continued.
Carl Heldmann
(And be sure to read Cost of Home Additions.)