A woman built her parents a 725-square-foot cottage in her backyard so they could be closer to their grandchildren - Business Insider

A "granny pod" ad inspired Caitlin Swann to build an ADU in her backyard for her parents when they retired. Now they're steps from their grandkids.

Because the ADU would be their home, the Christies paid for the build, not the Swanns.
"We did not spend a dime of our own personal money," Swann said.
The Christies lived in their home in New Jers…