640 S Mashta Drive, Key Biscayne, FL 33149

$16,800,000
4
BD
4
BA
3,620
SqFt

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List Price
$16,800,000
Days on Market
118
MLS#
A11990382
Bedrooms
4
Full Bathrooms
4
Sq. Ft
3,620
Subtype
Single Family Residence
County
Miami-Dade
Subdivision
Mashta Island
Year Built
1968

Property Description

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

Additional Information

Garage Spaces
2
Pets Allowed
Dogs OK, Yes
Construction
Block
Cooling
Central Air
Flooring
Other
Heating
Other
Restrict
OkToLease
Roof
Barrel
Taxes
$155,651
Utilities
Cable Available
View
Bay, Garden
Private Pool
Yes
Amenities
Boat Dock
Waterfront
Ocean Front
Acres
0.34
Price Per Sqft
$4,640
Elementary School
Key Biscayne K-8
Middle School
Ponce De Leon
High School
Coral Gables

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Listing courtesy of DLS International Realty. Contact:

All listings featuring the BMLS logo are provided by Beaches MLS Inc. Copyright 2026 Beaches MLS. This information is not verified for authenticity or accuracy and is not guaranteed. © 2026 Beaches Multiple Listing Service, Inc. All rights reserved.


Agent: Brigitte De Langeron | Email: brigitte@miamiwaterfront.com