1020 MARINER DR, Key Biscayne, FL 33149

1020 MARINER DR, Key Biscayne, FL 33149 is a 4-bedroom, 5.5-bathroom residential - single family : 1 unit built in 2013 with 5,760 square feet of living space on a 14,070 square foot lot. The property is currently owned by CBSB 0208 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 2024-08-01 for $15,650,000. There are 4 recorded sales for this property. The 2025 assessed value is $10,172,506 with a market value of $10,172,506.

This breaks down to $6,683,250 for the land and $3,489,256 for the building. The assessed value increased 23% from $8,271,112 in 2024. 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 $9,808,180 recorded against this property. 1020 MARINER 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 2011 to 2024, with 4 recorded transactions in the public record. The current assessed value represents 65% of the most recent sale price.

This low ratio may suggest the property is under-assessed relative to market value, common after recent improvements or a competitive purchase. Based on the most recent sale, this property traded at $2717 per square foot — a key metric for comparing value across Key Biscayne's real estate market..