420 Island Dr

Key Biscayne, FL 33149

$12,485,000

$1,949/ft²

6Beds

7Baths

6,405Sq ft

2017Year built

Single-family homeType

About this home

Spectacular and impeccably appointed modern residence situated on a 13,651 SF lot on prestigious Island Drive—one of Key Biscayne’s most elevated streets. Boasting a total of 8,011 SF, this 6-bedroom, 6 full bath + 2 half bath home is open, bright, and flooded with natural light throughout. Enjoy breathtaking water views and private access to the water in a setting that blends refined luxury with ultimate privacy. This residence showcases exquisitely curated, high-end designer finishes, a dramatic wine cellar, two expansive family rooms, and a closed 2-car garage. The outdoor living area is equally impressive, featuring a sleek summer kitchen and lush, professionally designed landscaping—ideal for elegant island living and entertaining. Per approved plans 6,405 SF under AC -8,682 SF Total

Features

Waterfront

Property details

Listing

MLS #: A11812864
Status: For sale
Listed on: May 30, 2025
Days on market: 436 days
Listing data updated: Jul 21, 2026

Interior

Beds: 6
Baths: 7
Living area: 6,405 ft²
Price per ft²: $1,949/ft²

Building & community

Type: Single-family home
Year built: 2017
County: Miami-Dade

Lot & exterior

Lot size: 13,651 ft²
Waterfront: Yes

Days on market, price per ft² and the monthly HOA amount are calculated by this site from the MLS data shown; the association fee is normalized to a monthly figure.

True monthly cost

Mortgage (principal & interest): $63,131
Property taxes (est.): $11,445
Home insurance (est.): $600
Flood insurance (est.): —

Estimated total$75,176*/mo

* Some cost lines aren't available yet for this listing; the total shown is incomplete.

Based on 20% down, a 6.5% rate and a 30-year loan, plus this home's estimated Florida carrying costs. All figures are illustrative estimates — not quotes, not financial or insurance advice.

Sources: flood zone — FEMA National Flood Hazard Layer; mortgage, taxes and insurance figures — this site's own estimates; HOA / CDD — as reported for this listing.

What will this home really cost you?