660 S MASHTA DR, Key Biscayne, FL 33149

660 S MASHTA DR, Key Biscayne, FL 33149 is a 5-bedroom, 5-bathroom residential - single family : 1 unit built in 1965 with 5,043 square feet of living space on a 15,000 square foot lot. The property is currently owned by GOLDEN HEIGHTS LLC, recorded as of 2026-03-29. The owner appears to be owner-occupied based on the mailing address matching the property address.

The most recent sale was on 2025-04-08 for $13,800,000. There are 5 recorded sales for this property. The 2025 assessed value is $9,904,835 with a market value of $10,020,831.

This breaks down to $9,300,000 for the land and $720,831 for the building. The assessed value increased 10% from $9,004,396 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 $4,940,394 recorded against this property. 660 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 2010 to 2025, with 5 recorded transactions in the public record. The current assessed value represents 72% of the most recent sale price. Based on the most recent sale, this property traded at $2736 per square foot — a key metric for comparing value across Key Biscayne's real estate market..