520 S MASHTA DR, Key Biscayne, FL 33149

520 S MASHTA DR, Key Biscayne, FL 33149 is a 3-bedroom, 4-bathroom residential - single family : 1 unit built in 1961 with 3,085 square feet of living space on a 22,140 square foot lot. The property is currently owned by FINCH DEVELOPMENT CORP, 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 2024-03-05 for $16,500,000. There are 4 recorded sales for this property. The 2025 assessed value is $12,870,000 with a market value of $12,870,000.

This breaks down to $12,845,173 for the land and $24,827 for the building. The assessed value increased 8% from $11,953,597 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 $8,525,223 recorded against this property. 520 S MASHTA 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 1992 to 2024, with 4 recorded transactions in the public record. The current assessed value represents 78% of the most recent sale price. Based on the most recent sale, this property traded at $5348 per square foot — a key metric for comparing value across Key Biscayne's real estate market..