America is full of abandoned malls. What if we turned them into housing?

Amy Casciani, a longtime real estate developer whose corporation built housing across seven states, watched her local community struggle for years to add new homes.

Casciani grew up in upstate New York, in a suburban town outside Rochester. She eventually started a family and raised her children there, and in the early 1990s, a new mall opened up, bringing over 100 new stores including anchor retailers like Sibley’s, J.C. Penney, and Sears.

The mall was a proud boon to the town of Irondequoit, and a go-to spot for teenagers to hang out. “Hands down the most attractive shopping mall in the area,” an editorial for a newspaper serving Albany declared. “From its blue Legolike entrances and splashing fountain to its light-trimmed glass roof, columns and carousel, the mall exudes carnival gaiety.”...