640 S Mashta Dr
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
Features
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Bedroom Information
Total beds: 4Bathroom Information
Total Baths: 4 Full Baths: 4Roofing Information
BarrelFlooring Information
Other -
Interior Features
BedroomOnMainLevel, BreakfastArea, DiningArea, DualSinks, EntranceFoyer, FirstFloorEntry, LivingDiningRoom, Pantry, SplitBedrooms, VaultedCeilings, WalkInClosetsRoof: BarrelAppliances: Dishwasher -
Heating & Cooling
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: 100Pool Features: InGround, PoolPrivate Pool: NoWater front Features: OceanFrontView: Bay, Garden -
Exterior Features
Exterior Features: Other
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Lot Information
Main Square Feet: 15000 Lot Size Square Feet: 15,000 Lot Description: LessThanQuarterAcreProperty Information
Subdivision: MASHTA ISLAND Source Property Type: Residential Postal Code Plus 4: 1735 Zoning Description: 2001 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: 24-52-05-008-0320 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, Guest, GarageDoorOpenerGarage Information
Has Garage: Yes Has Attached Garage: Yes Garage Space: 2 Pets Allowed: DogsOk, Yes
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School Information
Elementary School: Keybiscayne 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 Sqft |
| 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 Sqft |
| 120 Knollwood Drive, Key Biscayne, FL, 33149 | $19,950,000 | 6 | 7 | 6,208 | 16,827 Sqft |
| 161 Cape Florida Drive, Key Biscayne, FL, 33149 | $14,990,000 | 4 | 6 | 6,661 | 14,500 Sqft |
| 24 Grand Bay Estates Ci.., Key Biscayne, FL, 33149 | $4,950,000 | 5 | 6 | 4,220 | 6,534 Sqft |
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ByOwner last updated this listing 09/11/2026 @ 11:36
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