640 S Mashta Drive, Key Biscayne, FL

$16,800,000

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4

Beds

4

Baths

3,620

Square feet

0.34

Acres

About 640 S Mashta Drive

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

Single Family home for sale in Key Biscayne, FL at 640 S Mashta Drive. This 4 bedroom Single Family home is priced at $4,641/sqft

Features of 640 S Mashta Drive

MLS® # A11990382
Price $16,800,000
Bedrooms 4
Bathrooms 4.00
Full Baths 4
Square Footage 3,620
Acres 0.34
Year Built 1968
Type Single Family
Sub-Type Single Family Homes
Style Other
Status Active

Community Information: Key Biscayne

Address 640 S Mashta Drive
Area 2520
Subdivision MASHTA ISLAND
City Key Biscayne
County Miami-Dade
State FL
Zip Code 33149

Amenities of 640 S Mashta Drive

Utilities Cable Available
Parking Driveway, Garage Door Opener, Guest, Garage, Attached Garage, Attached
# of Garages 2
View Garden, Bay
Is Waterfront Yes
Waterfront Ocean Front
Has Pool Yes
Pool In Ground

Interior of 640 S Mashta Drive

Interior Features Entrance Foyer, Pantry, Vaulted Ceiling(s), Walk-In Closet(s), Bedroom Layout - Split
Appliances Dishwasher
Heating Other
Cooling Central Air
Fireplace No

Exterior of 640 S Mashta Drive

Exterior Features Other
Roof Barrel
Construction Block

School Information

Elementary Key Biscayne K-8
Middle Ponce De Leon
High Coral Gables

Additional Information On 640 S Mashta Drive

Listing Courtesy of DLS International Realty
Date Listed April 2nd, 2026
Zoning 2001
Foreclosure No
Short Sale No
RE / Bank Owned No

Listing Details

OfficeDLS International Realty

Listing Map

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