Alan Breslauer launched Custom Catios in 2017 after building his first cat enclosure in the early 2000s. Most catios cost Breslauer's clients between $5,000 and $15,000, but a few cost over $70,000.

Catios, or outdoor cat enclosures, are good for cats and native wildlife, according to the Feral Cat Coalition of Oregon and the Audubon Society of Portland. The two groups will host the second ...