621 N MASHTA DR, Key Biscayne, FL 33149

621 N MASHTA DR, Key Biscayne, FL 33149 is a 4-bedroom, 5-bathroom residential - single family : 1 unit built in 1987 with 3,202 square feet of living space on a 15,096 square foot lot. The property is currently owned by MASHTA NORTH 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 2021-11-30 for $8,025,000. There are 4 recorded sales for this property. The 2025 assessed value is $7,283,043 with a market value of $7,798,000.

This breaks down to $7,548,000 for the land and $250,000 for the building. The assessed value increased 10% from $6,620,949 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.

621 N 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 1999 to 2021, with 4 recorded transactions in the public record.

The current assessed value represents 91% of the most recent sale price. Based on the most recent sale, this property traded at $2506 per square foot — a key metric for comparing value across Key Biscayne's real estate market..