LAREDO, Texas — Out behind the nursing home where Josefina Alexander Gonzalez turned 99 Saturday, there’s a dilapidated green ranch house, its porch cover still held up by rough-hewn tree trunks.

To the southeast, you see a lot of tall brush and honey mesquite, a view that hasn’t changed much since the 1940s, when her parents bought a 1,000-acre ranch outside this isolated border town.

Look in any other direction, and you’ll see new construction on her property, as developers cash in on the last large tract of open space inside of Loop 20 in north Laredo, now worth as much as $150 million.