Miami’s $60M Star Island Estates Are Disappearing Into the Sea — Owners Can’t Save Them

Star Island is home to some of Miami’s most exclusive waterfront estates—private compounds worth $60 million or more, owned by celebrities, billionaires and global business figures. But beneath the luxury sits a growing crisis. Surrounded by Biscayne Bay and built on low-lying engineered land, Star Island faces king tides, storm surge, rising groundwater and increasingly difficult drainage. Owners are spending millions on higher seawalls, powerful pumps, elevated foundations and flood-resistant construction—but every upgrade exposes another weakness. As protection costs rise, insurance becomes more complicated and older mansions risk being valued as demolition projects rather than finished homes. The buyer pool gets smaller, the maintenance never ends and the water keeps rising. How much would you pay for a mansion that may require millions more just to remain dry? Subscribe to Sinking Fortunes for more stories about luxury properties confronting forces even billionaires cannot control.