520 S Mashta Drive
Key Biscayne, FL 33149
5
Bed
4
Bath
3,085Sqft
22,140Sqft(Lot)
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 exceptiona
Property Details
Map
Map
What's Nearby
Nearby Areas
Features
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Bedroom Information
Total beds: 5Bathroom Information
Total Baths: 4 Full Baths: 4Room Information
Rooms Total: 1Roofing Information
Barrel, SpanishTileFlooring Information
Tile -
Interior Features
MainLevelPrimary, SplitBedroomsRoof: Barrel, SpanishTile -
Heating & Cooling
Has Heating: Yes Heating: Central Has Cooling: Yes Cooling: CentralAir Water front: 1
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Building Information
Year Built: 1961Building Area Total: 4177Construction Materials: BlockStories: 1Frontage Length: 138.00Pool Features: InGroundPrivate Pool: YesWater front Features: Bayfront,OceanAccess,SeawallView: Bay, Ocean
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Lot Information
Main Square Feet: 22140 Lot Size Acres: 0.51Property Information
Subdivision: MASHTA ISLAND A REPLAT OF Source Property Type: Residential Postal Code Plus 4: 1733 Property SubType: Single Family Residence Direction Faces: East Levels: One Property Age: 65
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Listing Price Information
Listing Price: $19900000Cash, Conventional
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Tax Information
Parcel Number: 2452050090170 Tax Year: 2026 Annual Tax: $201741 Tax Legal Desc: 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
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Virtual Tour
Parking Information
DrivewayGarage Information
Has Garage: Yes Garage Space: 2Homeowners Association Information
Association Amenities: Other
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School Information
Elementary School: Key Biscayne K-8 Junior High School: Ponce De Leon Senior High School: Coral Gables -
Location Information
WaterSource: Public
How much is this property worth?
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Nearby Home Value
| Address | Estimate | Bed | Bath | Sq. Ft | Lot Size |
|---|---|---|---|---|---|
| 640 S Mashta Dr, Key Biscayne, FL, 33149 | $16,800,000 | 4 | 4 | 3,620 | 3,620 SqFt |
| 24 Grand Bay Estates Ci.., Key Biscayne, FL, 33149 | $4,950,000 | 5 | 6 | 4,220 | 4,220 SqFt |
| 200 Ocean Lane Drive #PB4, Key Biscayne, FL, 33149 | $1,400,000 | 1 | 1 | 1,217 | 1,217 SqFt |
| 200 Ocean Lane Drive #501, Key Biscayne, FL, 33149 | $3,850,000 | 4 | 4 | 1,880 | 1,880 SqFt |
| 200 Ocean Lane Drive #409, Key Biscayne, FL, 33149 | $1,499,000 | 2 | 2 | 1,610 | 1,610 SqFt |
| 200 Ocean Lane Drive #407, Key Biscayne, FL, 33149 | $1,275,000 | 2 | 2 | 1,580 | 1,580 SqFt |
| 200 Ocean Lane Drive #401, Key Biscayne, FL, 33149 | $3,600,000 | 3 | 3 | 2,412 | 2,412 SqFt |
| 31 Island Drive, Key Biscayne, FL, 33149 | $9,800,000 | 6 | 7 | 5,826 | 5,826 SqFt |
| 330 Gulf Road, Key Biscayne, FL, 33149 | $6,490,000 | 5 | 6 | 3,202 | 3,202 SqFt |
| 120 Knollwood Drive, Key Biscayne, FL, 33149 | $19,950,000 | 6 | 7 | 6,208 | 6,208 SqFt |
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ByOwner last updated this listing 08/20/2026 @ 00:39
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