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520 Mashta Dr, Key Biscayne, FL
Offering:
For Sale
Location:
Key Biscayne, FL 33149
Subdivision:
MASHTA ISLAND A REPLAT OF
Status:
Active
$19,900,000
Deemed reliable but not guaranteed.
Details
Year built:
1961
Lot size:
22,140 sq ft
Stories:
1
Garage:
2
Parking:
2 covered
Style:
One Story
Faces:
East
Days on market:
14
Annual tax (2026):
$201,741
Type:
Single-family home
MLS ID
A12071221
Virtual tour:
Listed by:
Coldwell Banker Realty (CBRE07)
Listing office phone:
305-361-5722
Listing office email:
Listing agent:
Maureen Jauregui (0549977)
Features
Schools
Elementary:
Keybiscayne
Middle / junior:
Ponce De Leon
High:
Coral Gables
School assignments come from the MLS feed and can change. Verify with the district before relying on them.
Utilities
Water source:
Public
Sewer:
Public Sewer
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.
Price history
$19,900,000 → $19,900,000
· 1 price changes
Location
520 S Mashta DrKey Biscayne, FL 33149
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MLS information
Last updated Aug 26, 2026
IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed.
