Key Biscayne Real Estate Market: Prices and Conditions in 2026

Key Biscayne’s real estate market is characterized by extreme scarcity and consistent international demand. The island cannot grow - it is finite by definition. Every time a property sells and someone new moves in, someone else has decided to leave. This dynamic keeps prices elevated and insulated from typical market cycles.

Price Levels

Entry condo: $650,000-$950,000. Mid-tier condo: $1M-$2.5M. Luxury condo: $2.5M-$6M+. Single-family homes: $1.8M minimum, $3M-$15M for premium locations. The average transaction price on Key Biscayne is among the highest in Miami-Dade County.

Inventory

Inventory on Key Biscayne is always low. There are only a finite number of properties and owners who have decided to leave do not replace themselves quickly enough to create buyer-friendly inventory levels. When a well-priced property comes to market here, it sells. Waiting for the perfect property can mean waiting a long time.

What Has Been Moving

Single-family homes on or near the bay have been the strongest performers. The post-pandemic preference for space and privacy, combined with the island’s unique character, has driven consistent demand at the upper end. Condo sales have been steadier with the Milestone inspection requirements creating some pressure on older buildings similar to other Miami-Dade condo markets.

International Buyer Component

Key Biscayne has a strong international buyer component - Brazilian, Venezuelan, Colombian, European, and Middle Eastern buyers are all active in this market. Cash transactions are common. International demand provides significant floor support.