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640 S Mashta Dr, Key Biscayne FL 33149

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$16,800,000

4

4

3,620 SF

$4,641

 
PROPERTY TYPESingle Family Residence
Lot Size15,000 SF
YEAR BUILT1968
WATERFRONTYes
STYLEAttached,Other
PARKINGYes
SWIMMING POOLIn Ground
STATUSActive

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    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

    LIST PRICE $16,800,000
    PRICE CHANGE0%
    BEDS 4
    BATHS 4
    1/2 BATHS 0
    LIVING SIZE 3,620 SF
    PRICE SF$4,641
    YEAR BUILT 1968
    WATERFRONT Yes
    VIEWBay,Garden
    SWIMMING POOL In Ground
    STYLE Attached,Other
    CONSTRUCTION Concrete Block Construction
    PARKING Yes
    PARKING SPACES
    FLOORING TYPE No
    MLS A11990382
    PROPERTY TYPESingle Family Residence
    STATUS Active
    DATE LISTED 2026-04-02
    DAYS ON MARKET 19
    FURNISHED
    Pets Allowed Dogs OK
    CITY Key Biscayne
    ZIP33149
    STATE FL
    SUBDIVISION MASHTA ISLAND
    HOA FEES $0
    TAXES $155,651
    TAXES YEAR 2025

    ROAD VIEW

    SATELLITE VIEW

    bird’s eye view

    STREET VIEW

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