Size: 84 sq. ft.

Location: Olympia, Washington

Dee Williams returned from an eye-opening trip to Guatemala and decided to downsize her home from 1,500 square feet to just 84 square feet. She moved out of her big house, built a small one from scratch, and parked it in her friend's backyard.

This home, which she calls "The Little House," cost about $10,000 to build, and even less to maintain. With a propane tank for heat and solar panels for electricity, Williams pays very little to live there.