A 26-year-old built a $260,000 ADU on her family's property. Now, she lives in the 748-square-foot space with her sister. - Business Insider

Instead of buying a new house, Mia Corippo used her savings to build a 748-square-foot ADU on her parents' property in California.

A 26-year-old built a $260,000 ADU on her family's property.

Now, she lives in the 748-square-foot space with her sister.