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House in Key Biscayne, FL 33149Mashta Island, 640 S Mashta Dr
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OFF MARKET
$19,500,000
5
Beds5
Baths3,620
SqFtStatus
OFF MARKETExpired
Parking
2
Size
3,620 SqFt (336 m2)
Price
$5,387/SqFt ($57,983/m2)
Type
House
Built
1968
MLS Number
A11896953
View
Bay,Ocean
On Site
333 Days
Updated
333 Days ago
Page Views
0
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.
Features
Bedrooms
- Bedrooms: 5
Bathrooms
- Bathrooms: 5
- Half Bathrooms: No info
Exterior and Lot Features
- Exterior Features: SecurityHighImpactDoors
- View: Bay,Ocean
Interior, Heating and Cooling
- Interior Features: BuiltInFeatures, BedroomOnMainLevel, FirstFloorEntry
- Equipment / Appliances: Dryer, Dishwasher, Microwave, Washer
- Heating Description: Central
- Cooling Description: CentralAir
Building and Construction
- Floor Description: Hardwood,Tile,Wood
- Year Built: 1968
- Year Built Description: Resale
- Style: Detached,TwoStory
Waterfront and Water Access
- Waterfront Frontage: Yes
School Information
- Elementary School: Keybiscayne
- Middle School: Ponce De Leon
- Senior High School: Coral Gables
Other Property Info
- Garage: 2
- Listing Date: 2025-10-16T19:04:46.000-00:00
- Directions: East
Taxes, Fees & More
- Taxes: 81859
- Parking Description: CircularDriveway, Covered, Driveway
Apples-to-Apples Comparables
Price History
Date
Event
Price
Change
Price Per
10/15/2025
Listed
$19.5M
$5,387 ft2
$57,983 m2
10/15/2025
$19.5M
Event
Listed
Price Per
$5,387 ft2
$57,983 m2
Price per square foot and days on website are not provided values and are calculated by Subdivisions.
Listed by Claudia Fontecilla • DLS International Realty • Buyer Agency Compensation .
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Scores
8
100
36
100
80
100
0
100
24
100
0
100
Community Snapshot
4 – 5 BR
Bedrooms
$6.4M – $19.9M
Price Tier
2,255 - 10,820
SqFt Range
1972
Year Build
1
Total Floors
71
Total Units
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- Biscayne Key Estates House7
- Cape Florida House8
- Casa Del Mar Mixed4
- Club Tower Condo2
- Grand Bay Tower Condo4
- Holiday Colony House0
- Island House Co-Op5
- Key Cassa Condo2
- Lake Villa Condo2
- Mashta Island Mixed4
- Matheson Estates House0
- Ocean Tower Condo6
- Oceana Key Biscayne Mixed6
- Resort Villa Condo2
- Sands Of Key Biscayne Condo3
- The Ritz-Carlton Key Biscayne Condo1
- Tropical Isle Homes House14
The data relating to real estate for sale on this web site comes in part from the Broker Reciprocity' Program of the Regional Multiple Listing Service of Miami Dade, Broward, Palm Beach, Collier and Lee Counties. Not all listings found on this site are necessarily listed through Subdivisions.com. Real estate listings held by brokerage firms other than Subdivisions.com are marked with the Broker Reciprocity' logo or the Broker Reciprocity' thumbnail logo (little black house) and detailed information about them includes the name of the listing brokers.
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