Penthouses for Sale in Key Biscayne, Florida

Key Biscayne is Miami's island village — past the Rickenbacker tollgate, between two state parks, with a K-8 school and streets where kids bike to the beach. Condo supply is capped by ordinance and the last new building arrived in 2014, so the market trades on genuine scarcity.

A penthouse in Key Biscayne is a different asset from the tower beneath it: the top floors carry higher ceilings, wraparound terraces, private elevators and often the only floor plans in the building that live like houses in the sky. Known for a family island village between two state parks, fifteen minutes from Brickell, Key Biscayne prices its penthouse lines on scarcity — a tower releases only a handful, and the true trophy units trade quietly and rarely. Every listing below is a genuine top-floor residence, identified by the building's own PH designation rather than a marketing label.