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 |
|---|---|---|---|---|---|
| 140 Hampton Ln, Key Biscayne, FL, 33149 | $5,495,000 | 5 | 6 | 3,476 | 3,476 SqFt |
| 485 W Matheson Dr, Key Biscayne, FL, 33149 | $237,000,000 | 5 | 9 | 11,528 | 11,528 SqFt |
| 571 Glenridge Rd, Key Biscayne, FL, 33149 | $7,490,000 | 5 | 7 | 3,768 | 3,768 SqFt |
| 301 Hampton Ln, Key Biscayne, FL, 33149 | $3,600,000 | 4 | 3 | 2,068 | 2,068 SqFt |
| 255 Ridgewood Rd, Key Biscayne, FL, 33149 | $3,550,000 | 4 | 3 | 2,177 | 2,177 SqFt |
| 524 Warren Ln, Key Biscayne, FL, 33149 | $3,750,000 | 5 | 4 | 2,700 | 2,700 SqFt |
| 269 Cranwood Dr, Key Biscayne, FL, 33149 | $3,980,000 | 5 | 4 | 2,821 | 2,821 SqFt |
| 250 Greenwood Drive, Key Biscayne, FL, 33149 | $3,599,000 | 5 | 5 | 3,297 | 3,297 SqFt |
| 545 Sabal Palm, Key Biscayne, FL, 33149 | $7,950,000 | 5 | 5 | 4,166 | 4,166 SqFt |
| 445 Ridgewood Rd, Key Biscayne, FL, 33149 | $6,870,000 | 5 | 6 | 3,688 | 3,688 SqFt |
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ByOwner last updated this listing 06/04/2026 @ 14:28
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