Single Family Residence - Mashta Island A Replat Of

520 S Mashta Dr, Key Biscayne, FL 33149
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$19,900,000  Built: 1961
5 bedrooms 4 bathrooms N/A
Type of PropertySingle Family Residence
Style of PropertyWF/Pool/Ocean Access
Property Ft²4,177
Living Ft²3,085
Price per Ft²$6,450.57
PetsN/A
WaterfrontYes
PoolYes
FurnitureN/A
Property description of Single Family Residence - Mashta Island A Replat Of

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.

Exterior Features
No information about Exterior Features.
Interior Features
First Floor Entry
Split Bedroom
Family Room
Amenities
Other Subdivision - See Remarks
Equipment/Appliances
Other Equipment/Appliances
Property Features
NameMashta Island A Replat Of
MLSA12071221
Last Update7 days
ForeclosureN/A
Short SaleN/A
ParkingDriveway
Lot Ft²22,140
Approx. Lot Size 
Balcony/PorchN/A
Boat DockYes
Pet Restrictions 
Floor Number 
Cooling DescriptionCentral Air
Heating DescriptionCentral
ViewBay, Direct Ocean
ConstructionConcrete Block Construction
Floor TypeTile
Maintenance Fees 
Association Fees 
Taxes$201,741
Property contact form
Gladys Martinez PA
Gladys Martinez PA305-321-7889954-743-1905gmrealtor7@gmail.com
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MLS Data Source: Miami Association of REALTORS. Copyright SEFMLS © 2026
Listing is a courtesy of Coldwell Banker Realty. Office (305-361-5722). Agent (carter.jauregui@gmail.com, 305-798-3124).
Accuracy of listing information is not guaranteed. Listing information is provided for personal consumer, non-commercial use, solely to identify potential properties for potential purchase. All other use is strictly prohibited, is a violation of the terms of use, and may violate federal and state law.

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