MIAMI — In 2007, three years before Luigi Boria was elected mayor of Doral, a boutique South Florida developer bought and rezoned a 12-acre parcel of land to build an enclave of single-family homes with a smattering of commercial spaces.

The project was named Grand Floridian Estates.

It seemed like a sensible project for the growing city whose proximity to an international airport made it home to many export and import companies.