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640 S Mashta Dr, Key Biscayne FL 33149

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640 S Mashta Dr640 S Mashta Dr640 S Mashta Dr640 S Mashta Dr
Active · For Sale
$16,800,000
640 S Mashta Dr, Key Biscayne FL 33149
Data via Miami Association of REALTORS® (MiamiRE)
4
Beds
4
Baths
4 full
3,620
Sq Ft
$4,641
Per Sq Ft
15,000
Lot Sq Ft

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

MLS #:A11990382
Status:Active
Property Type:Residential · Single Family Residence
Year Built:1968
Living Area:3,620 sq ft
Lot Size:15,000 sq ft
Bathrooms:4 (4 full)
HOA:None
Annual Taxes:$155,651 (2025)
Days on Market (per MLS):170
Waterfront:Yes · Ocean Access, Ocean Front
View:Bay, Garden
Parking:2-car garage
Cooling:Central Air
Construction:Concrete Block Construction
Zoning:2001
Subdivision (per MLS):MASHTA ISLAND
City:Key Biscayne
ZIP:33149
County:Miami-Dade
MLS record last modified:September 19, 2026
Map showing the location of 640 S Mashta Dr, Key Biscayne FL 33149
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