520 S Mashta Dr, Key Biscayne, FL 33149
For Sale $19,900,000
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Contact the Listing Agent directly:
Listing Agent: Maureen Jauregui
Agent Phone:
305-798-3124
Agent Email:
carter.jauregui@gmail.com
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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.
Bedroom Layout - Split
Other
Taxes: $201,741.00
Tax Year: 2026
Other
Bay
Direct Ocean
Ocean Access
Seawall
Bayfront
Elementary School: Key Biscayne K-8
Middle School: Ponce De Leon
Junior High: Ponce De Leon
High School: Coral Gables
MLS Area: 2520
Total Square Footage: 4,177
Price per Square Feet: $6,450.56
Total Rooms: 1
Total Floors: 1
Water: Public
Construction: Block
Date Listed: 2026-08-12 00:00:00
Pool: Y
Pool Description: In Ground
Parking: Driveway
Garage Spaces: 2
Flooring: Tile
Roof: Barrel, Spanish Tile
Heating: Central
Cooling: Central Air
Sewer: Public Sewer
Parcel ID: 2452050090170
Amenities: Other
Listing Courtesy Of: Coldwell Banker Realty
carter.jauregui@gmail.com
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.
Property Details
Price: $19,900,000
Sq Ft: 3,085
($6,451 per
sqft)
Bedrooms: 5
Bathrooms: 4
City: Key Biscayne
County: Miami-Dade
Type: Single Family
Development: Mashta Island A Replat Of
Acres: 0.5100
Virtual Tour/Floorplan: View
Year Built: 1961
Listing Number: A12071221
Status Code: A-Active
Taxes: $201,741.00
Tax Year: 2026
Garage:
2
Interior Features:
Bedroom Layout - Split
Amenities:
Other
Financial Information:
Taxes: $201,741.00
Tax Year: 2026
Equipment:
Other
View:
Bay
Direct Ocean
Waterfront Description:
Ocean Access
Seawall
Bayfront
School Information:
Elementary School: Key Biscayne K-8
Middle School: Ponce De Leon
Junior High: Ponce De Leon
High School: Coral Gables
Additional Information:
MLS Area: 2520
Total Square Footage: 4,177
Price per Square Feet: $6,450.56
Total Rooms: 1
Total Floors: 1
Water: Public
Construction: Block
Date Listed: 2026-08-12 00:00:00
Pool: Y
Pool Description: In Ground
Parking: Driveway
Garage Spaces: 2
Flooring: Tile
Roof: Barrel, Spanish Tile
Heating: Central
Cooling: Central Air
Sewer: Public Sewer
Parcel ID: 2452050090170
Amenities: Other
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Map of 520 S Mashta Dr, Key Biscayne, FL 33149
Listing Courtesy Of: Coldwell Banker Realty
carter.jauregui@gmail.com