Key Biscayne Investment Property: The Scarcity Premium and Returns

Key Biscayne’s investment thesis is almost entirely scarcity and appreciation. The rental yields are modest because prices are very high, but the capital appreciation history is excellent and the demand is durable.

Rental Market

A 3-bedroom condo on Key Biscayne rents for $7,000-$12,000+/month. Single-family homes rent for $12,000-$25,000+/month. Seasonal premium is significant - winter rentals command 40-60% above annual rates. Demand from executives, diplomats, and wealthy families who want island privacy for a season is consistent.

Cap Rates

Net cap rates are typically 2.5-3.5% given the extremely high purchase prices. This is not the market for current yield investors. It is the market for capital preservation and appreciation. A buyer who purchased here in 2015 has doubled their money in most cases. The island’s finite nature means this appreciation trajectory has more runway.

Short-Term Rental

Some condo buildings on Key Biscayne permit seasonal rentals (3-month minimum typically). Annual STR revenue on a 3BR condo can reach $100,000-$150,000+ for well-managed properties with quality presentation. This is the highest STR yield potential of any Miami-Dade residential market outside of Miami Beach.