640 S Mashta Drive
Key Biscayne, FL 33149
4
Bed
4
Bath
3,620Sqft
15,000Sqft(Lot)
Welcome to your own slice of paradise! Enjoy breathtaking sunsets from your private dock on this waterfront property boasting 100 feet of direct Biscayne Bay frontage. Ideally located on Mashta Island. Set on a 15,000 SF lot, the home features 5 beds, 5 baths, including 2 bayfront primary suites with stunning views, impact windows and doors throughout. The open-concept layout flows seamlessly from the living and dining areas to the modern kitchen and out to the pool and entertainment patio, with floor-to-ceiling glass doors that open to blend indoor and outdoor living. Tranquil guest suite upstairs offering privacy and views. It also features an oversized 2-car garage, covered parking, and a spacious driveway for guests. Perfect to move in, renovate, or build your dream waterfront estate
Property Details
Map
Map
What's Nearby
Nearby Areas
Features
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Bedroom Information
Total beds: 4Bathroom Information
Total Baths: 4 Full Baths: 4Room Information
Rooms Total: 1Roofing Information
BarrelFlooring Information
Other -
Interior Features
BreakfastArea, Bathtub, DiningArea, DualSinks, EntranceFoyer, LivingDiningRoom, MainLevelPrimary, MultipleEnSuiteBathrooms, Pantry, SplitBedrooms, SoakingTub, SeparateShower, VaultedCeilings, WalkInClosetsRoof: BarrelAppliances: Dishwasher -
Heating & Cooling
Has Heating: Yes Heating: Other Has Cooling: Yes Cooling: CentralAir Water front: 1
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Building Information
Year Built: 1968Building Area Total: 4990Construction Materials: BlockFrontage Length: 100.00Pool Features: InGroundPrivate Pool: YesWater front Features: OceanFrontView: Bay, Garden -
Exterior Features
Exterior Features: Other
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Lot Information
Lot Dimensions: 15000 Main Square Feet: 15000 Lot Size Acres: 0.34Property Information
Subdivision: MASHTA ISLAND Source Property Type: Residential Postal Code Plus 4: 1735 Property SubType: Single Family Residence Direction Faces: East Property Age: 58
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Listing Price Information
Listing Price: $16800000Cash, Conventional
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Tax Information
Parcel Number: 2452050080320 Tax Year: 2025 Annual Tax: $155651 Tax Legal Desc: MASHTA ISLAND PB 60-93 LOT 9 BLK 3 LOT SIZE 100.000 X 150 OR 18642-3922 0599 1
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Virtual Tour
Parking Information
Attached, Driveway, Garage, GarageDoorOpener, GuestGarage Information
Has Garage: Yes Has Attached Garage: Yes Garage Space: 2 Pets Allowed: DogsOk, YesHomeowners Association Information
Association Amenities: BoatDock
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School Information
Elementary School: Key Biscayne K-8 Junior High School: Ponce De Leon Senior High School: Coral Gables -
Utility Information
CableAvailable -
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 |
|---|---|---|---|---|---|
| 110 Hampton Ln, Key Biscayne, FL, 33149 | $6,900,000 | 6 | 7 | 3,550 | 7,500 Sq. Ft |
| 200 Ocean Lane Drive #401, Key Biscayne, FL, 33149 | $3,600,000 | 3 | 3 | 2,412 | -- |
| 200 Ocean Lane Drive #PB4, Key Biscayne, FL, 33149 | $1,400,000 | 1 | 1 | 1,217 | -- |
| 200 Ocean Lane Drive #407, Key Biscayne, FL, 33149 | $1,220,000 | 2 | 2 | 1,580 | -- |
| 200 Ocean Lane Drive #409, Key Biscayne, FL, 33149 | $1,499,000 | 2 | 2 | 1,610 | -- |
| 200 Ocean Lane Drive #501, Key Biscayne, FL, 33149 | $3,850,000 | 4 | 4 | 1,880 | -- |
| 31 Island Drive, Key Biscayne, FL, 33149 | $9,800,000 | 6 | 7 | 5,826 | 19,236 Sq. Ft |
| 120 Knollwood Drive, Key Biscayne, FL, 33149 | $19,950,000 | 6 | 7 | 6,208 | 16,827 Sq. Ft |
| 161 Cape Florida Drive, Key Biscayne, FL, 33149 | $14,990,000 | 4 | 6 | 6,661 | 14,500 Sq. Ft |
| 24 Grand Bay Estates Ci.., Key Biscayne, FL, 33149 | $4,950,000 | 5 | 6 | 4,220 | 6,534 Sq. Ft |
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ByOwner last updated this listing 09/20/2026 @ 22:04
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