520 S Mashta Dr, Key Biscayne FL 33149
Key Biscayne, FL, 33149
$19,900,000
+ 26 more photos
Property facts
- Status
- Active
- Price
- $19,900,000
- Bedrooms
- 5
- Bathrooms
- 4
- Living area
- 3,085 sqft
- Lot size
- 22,140 sqft
- Year built
- 1961
- Type
- Single Family Residence
- Garage spaces
- 2
- Days on market
- 14
- On market
- August 12, 2026
- MLS #
- A12071221
About this single family residence
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.
Explore the full Key Biscayne market intelligence report — pricing trends, inventory & sales pace.
Listing courtesy of Maureen Jauregui, Coldwell Banker Realty, 305-361-5722. Listing information courtesy of the MIAMI Association of REALTORS® IDX feed. The data relating to real estate for sale on this web site comes in part from the participating Associations/MLS's IDX Program. This information is being provided for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is deemed reliable but is not guaranteed accurate by the MLS.