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Key Biscayne/640 S Mashta Drive

$16,800,000
640 S Mashta Drive, Key Biscayne, FL 33149
Key Biscayne, FL 33149 · Ocean Front
4
Beds
4
Baths
3,620
Sq Ft
$4,641
/ Sq Ft

About this home

Welcome to your own slice of paradise! Enjoy breathtaking sunsets from your private dock on this waterfront property boasting 100 feet of direct Biscayne Bay frontage. Ideally located on Mashta Island. Set on a 15,000 SF lot, the home features 5 beds, 5 baths, including 2 bayfront primary suites with stunning views, impact windows and doors throughout. The open-concept layout flows seamlessly from the living and dining areas to the modern kitchen and out to the pool and entertainment patio, with floor-to-ceiling glass doors that open to blend indoor and outdoor living. Tranquil guest suite upstairs offering privacy and views. It also features an oversized 2-car garage, covered parking, and a spacious driveway for guests. Perfect to move in, renovate, or build your dream waterfront estate

The facts

Price
$16,800,000
Price / Sq Ft
$4,641
Bedrooms
4
Bathrooms
4
Interior
3,620 sq ft
Type
SingleFamilyResidence
Year Built
1968
Lot Size
0.34 acres
Pool
Yes
Garage
2 spaces
Flooring
Other
Waterfront
Ocean Front
Annual Tax
$155,651
Days on Market
109
MLS #
A11990382

Amenities

  • Boat Dock
BeachesMLS

Listing courtesy of DLS International Realty · brigitte@miamiwaterfront.com. All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright ©2026 BeachesMLS, Inc.