$18,500,000list price
Price cut$1,400,000
5 bd · 4 ba · 3,085 sq ft House
520 S MASHTA DR #33149, KEY BISCAYNE, FL 33149
Listing courtesy of Coldwell Banker Realty. MLS# A12071221.On the MLS · Listed Aug 10
$16,800,000
640 S MASHTA DR #33149, KEY BISCAYNE, FL 33149
4 beds4 baths3,620 sq ftHouseBuilt 1968
Updated today, November 3, 2026This home against Key Biscayne
$4,641 per sq ft, 282% over the Key Biscayne median
217 days on the market
$155,651 in property taxes (2025)
14,810 sq ft lot
Private pool
Waterfront
2 car garage
Key Biscayne today: 129 homes for sale, median list price $2,725,000.
About this home
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
Zoned schools
Elementary: Key Biscayne K-8 Center
Middle: Ponce de Leon Middle School
High: Coral Gables Senior High School
From Miami-Dade County Public Schools attendance zones.
Listing courtesy of DLS International Realty. MLS# A11990382.
Listing information is provided by the MLS and is deemed reliable but not guaranteed.
Listed March 31, 2026.
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