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520 S Mashta Dr, Key Biscayne FL 33149

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$19,900,000

5

4

3,085 SF

$6,451

 
PROPERTY TYPESingle Family Residence
Lot Size22,140 SF
YEAR BUILT1961
WATERFRONTYes
STYLEAttached,One Story
PARKINGYes
SWIMMING POOLIn Ground
STATUSActive

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    Property Description

    Seize a rare opportunity to create a landmark waterfront estate on one of the largest residential lots in Key Biscayne’s exclusive Mashta Island enclave. Spanning an extraordinary 22,140 square feet, this exceptional property offers 138 feet of pristine water frontage and sweeping open water views, providing an unparalleled setting for a world class residence. Plans by renowned architect, Pablo Corazzini of Vitalini Corazzini Architects, are available to the buyer, offering a thoughtfully conceived vision that takes full advantage of the property’s remarkable scale, premier waterfront setting, and spectacular sunsets. The proposed design creates an extraordinary canvas for sophisticated indoor-outdoor living and entertaining, should the buyer choose to pursue the concept. With its exceptional lot size, expansive water frontage, and coveted Mashta Island address, this is a truly irreplaceable opportunity to create a legacy estate in one of South Florida’s most prestigious waterfront communities.

    LIST PRICE $19,900,000
    PRICE CHANGE0%
    BEDS 5
    BATHS 4
    1/2 BATHS 0
    LIVING SIZE 3,085 SF
    PRICE SF$6,451
    YEAR BUILT 1961
    WATERFRONT Yes
    VIEWBay,Direct Ocean
    SWIMMING POOL In Ground
    STYLE Attached,One Story
    CONSTRUCTION Concrete Block Construction
    PARKING Yes
    PARKING SPACES
    FLOORING TYPE No
    MLS A12071221
    PROPERTY TYPESingle Family Residence
    STATUS Active
    DATE LISTED 2026-08-12
    DAYS ON MARKET 6
    FURNISHED
    Pets Allowed No
    CITY Key Biscayne
    ZIP33149
    STATE FL
    SUBDIVISION MASHTA ISLAND A REPLAT OF
    HOA FEES $0
    TAXES $201,741
    TAXES YEAR 2026

    ROAD VIEW

    SATELLITE VIEW

    bird’s eye view

    STREET VIEW

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