$18,500,000
4 bd · 4.5 ba · 2,255 sqft
631 N Mashta Drive, Key Biscayne FL 33149
$19,900,0005 Beds4 Baths3,085 Sq. Ft.$6,451 / sq. ft.
520 S Mashta Dr, Key Biscayne FL 33149
Key Biscayne, FL 33149 · MASHTA ISLAND A REPLAT OF
Status
Active
Type
Single Family Residence
Year Built
1961
Days on Market
7
Lot Size
22,140 sqft
MLS #
A12071221
County
Miami-Dade County
Description of 520 S Mashta Dr, Key Biscayne FL 33149
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 for 520 S Mashta Dr, Key Biscayne FL 33149
- Bathrooms Full
- 4
- Bathrooms Half
- 0
- Interior Features
- First Floor Entry, Split Bedroom, Family Room
- Appliances
- Other Equipment/Appliances
- Flooring
- Tile
- Heating
- Central
- Cooling
- Central Air
- Architectural Style
- Attached, One Story
- Garage Spaces
- 2
- Parking Features
- Driveway
- Pool Features
- In Ground
- Pool Private
- No
- Year Built Details
- Resale
- Direction Faces
- East
Building Information for 520 S Mashta Dr, Key Biscayne FL 33149
- Building Name
- MASHTA ISLAND A REPLAT OF
- Building Area Total
- 4177
- Building Area Units
- Square Feet
- Association
- No
Property Information for 520 S Mashta Dr, Key Biscayne FL 33149
- Lot Features
- 1/2 To Less Than 3/4 Acre Lot
- Lot Size Square Feet
- 22,140
- Waterfront
- Yes
- Waterfront Features
- Ocean Access, Seawall
- Frontage Length
- 138
- View
- Bay, Direct Ocean
- Construction Materials
- Concrete Block Construction
- Roof
- Barrel Roof, Curved/S-Tile Roof
- Sewer
- Public Sewer
- Water Source
- Municipal Water
- New Construction
- No
Public Records for 520 S Mashta Dr, Key Biscayne FL 33149
- Parcel Number
- 24-52-05-009-0170
- Tax Annual Amount
- $201,741
- Tax Year
- 2,026
- Tax Legal Description
- 5-6 55 42 MASHTA ISLAND A REPLAT OF TRS A & C SELY35FT LOT 16 & ALL LT 17 BLK BLK 3 LOT SIZE 135.000 X 164 OR 15816-1278 1292 1
- Zoning
- 2001
- County Or Parish
- Miami-Dade County
Schools Near 520 S Mashta Dr, Key Biscayne FL 33149
- Elementary School
- Keybiscayne
- Middle School
- Ponce De Leon
- High School
- Coral Gables
School assignments are provided by the listing and should be independently verified.
Location
520 S Mashta Dr, Key Biscayne FL 33149 · More homes in Key Biscayne
Courtesy of Coldwell Banker Realty
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More information about 520 S Mashta Dr, Key Biscayne FL 33149
520 S Mashta Dr is a single family home for sale in Key Biscayne, FL 33149. This property was listed for sale on August 12, 2026 by Coldwell Banker Realty, it's currently listed at $19,900,000. This listing's school district is Miami-Dade County Public Schools. Nearby schools include Keybiscayne, Ponce De Leon and Coral Gables. 520 S Mashta Dr is a 5-bed, 4-bath, 3,085 sqft single family home built in 1961.