921 HARBOR DR, Key Biscayne, FL 33149

921 HARBOR DR, Key Biscayne, FL 33149 is a 4-bedroom, 4-bathroom residential - single family : 1 unit built in 1960 with 4,444 square feet of living space on a 15,569 square foot lot. The property is currently owned by BLUE ATLANTIC CAPITAL LLC, recorded as of 2026-03-29. The mailing address differs from the property address, suggesting this may be an investment property or rental.

The most recent sale was on 2022-05-10 for $7,590,000. There are 4 recorded sales for this property. The 2025 assessed value is $7,685,976 with a market value of $7,840,882.

This breaks down to $7,011,298 for the land and $829,584 for the building. The assessed value increased 10% from $6,987,251 in 2024. This property is located in FEMA Flood Zone AE, a Special Flood Hazard Area with a 1% annual chance of flooding (100-year floodplain).

Flood insurance is typically required by lenders for properties in this zone. The median household income in this area is $250,001, and the median home value is $2,000,001. The population density is 3,407 people per square mile.

There are active mortgage liens totaling $4,536,908 recorded against this property. 921 HARBOR DR, Key Biscayne, FL 33149 is located in Key Biscayne, Florida. Property records, tax assessments, sales history, and ownership information for this Key Biscayne property are sourced from miami_dade County public records.

The complete ownership history of this property spans from 1998 to 2022, with 4 recorded transactions in the public record. The current assessed value represents 101% of the most recent sale price. Based on the most recent sale, this property traded at $1708 per square foot — a key metric for comparing value across Key Biscayne's real estate market..