550 Harbor Dr

Key Biscayne, FL 33149

$19,450,000

$2,994/ft²

7Beds

7.5Baths

6,497Sq ft

2003Year built

Single-family homeType

About this home

Situated on the exclusive island of Key Biscayne, this extraordinary 7,000sqft waterfront estate sits on a rare double lot located on Hurricane Harbor overlooking tranquil Manatee Lagoon. The property offers an unparalleled sanctuary of luxury and seclusion with features including a 4 car garage ideal for collectors, professionally landscaped yard well suited for outdoor entertaining, 7 bedrooms and 7.5 baths including live-in staff quarters. Expansive living areas flow seamlessly to large outdoor, covered porches becoming your al fresco living room for outdoor dining or relaxing and soaking in the beauty of the natural environment. As the sun hits the horizon, Sunsets light up the sky illuminating the clouds in a breathtaking array of tropical colors. Text listing agent. 24hr notice

Features

Waterfront

Property details

Listing

MLS #: A11912105
Status: For sale
Listed on: Nov 11, 2025
Days on market: 272 days
Listing data updated: Aug 9, 2026

Interior

Beds: 7
Baths: 7.5
Living area: 6,497 ft²
Price per ft²: $2,994/ft²

Building & community

Type: Single-family home
Year built: 2003
County: Miami-Dade

Lot & exterior

Lot size: 22,975 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): $98,350
Property taxes (est.): $17,829
Home insurance (est.): $600
Flood insurance (est.): —

Estimated total$116,779*/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?