40 ISLAND DR, Key Biscayne, FL 33149

40 ISLAND DR, Key Biscayne, FL 33149 is a 5-bedroom, 5-bathroom residential - single family : 1 unit built in 1969 with 3,517 square feet of living space on a 15,000 square foot lot. The property is currently owned by SANTIAGO ULLOA GIULIETTA ULLOA, recorded as of 2026-04-19. The owner appears to be owner-occupied based on the mailing address matching the property address.

The most recent sale was on 2020-12-03 for $5,918,300, when WILLIAM BULLARD &W PHILLIPA sold to SANTIAGO ULLOA. The property has appreciated $3,043,300 (106%) since the prior sale of $2,875,000 on 2004-09-01. There are 3 recorded sales for this property.

The 2025 assessed value is $4,524,248 with a market value of $7,973,411. This breaks down to $7,125,000 for the land and $848,411 for the building. The assessed value increased 3% from $4,396,743 in 2024.

The property has the following tax exemptions: homestead. 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 $280,402 recorded against this property. 40 ISLAND 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 2003 to 2020, with 3 recorded transactions in the public record. The current assessed value represents 76% of the most recent sale price. Based on the most recent sale, this property traded at $1683 per square foot — a key metric for comparing value across Key Biscayne's real estate market..