HAUTE RESIDENCEHL REAL ESTATE GROUP☎ +1 (800) 257-5661
Home / Search / 520 S Mashta Dr, Key Biscayne FL 33149

520 S Mashta Dr, Key Biscayne FL 33149

Email
520 S Mashta Dr520 S Mashta Dr520 S Mashta Dr520 S Mashta Dr
Active · For Sale
$18,500,000
520 S Mashta Dr, Key Biscayne FL 33149
Data via Miami Association of REALTORS® (MiamiRE)
5
Beds
4
Baths
4 full
3,085
Sq Ft
$5,997
Per Sq Ft
22,140
Lot Sq Ft

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.

MLS #:A12071221
Status:Active
Property Type:Residential · Single Family Residence
Year Built:1961
Living Area:3,085 sq ft
Lot Size:22,140 sq ft
Bathrooms:4 (4 full)
HOA:None
Annual Taxes:$201,741 (2026)
Days on Market (per MLS):75
Waterfront:Yes · Ocean Access, Seawall
View:Bay, Direct Ocean
Parking:2-car garage
Cooling:Central Air
Construction:Concrete Block Construction
Zoning:2001
Subdivision (per MLS):MASHTA ISLAND A REPLAT OF
City:Key Biscayne
ZIP:33149
County:Miami-Dade
MLS record last modified:October 26, 2026
Map showing the location of 520 S Mashta Dr, Key Biscayne FL 33149
Back☎Request Private Showing