640 S Mashta Dr, Key Biscayne, FL 33149

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4beds

4baths

3,620sqft

1968year built

ActiveResidentialSingle Family ResidenceLot 14,810 sqftHOA None155 DOMMLS# A11990382

Listed by: Brigitte De Langeron 305-244-7493, DLS International Realty 305-459-3875

Source:Beaches MLS (RAPB)|MLS #A11990382

What's special

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

Bedrooms4

Bathrooms4

Year built1968

Home typeSingle Family Residence

Property subtypeResidential

Living area3,620 sqft

Lot size14,810 sqft

Pool featuresIn Ground

RegionKey Biscayne, FL

HOA feeNone

Price per square foot$4641/sqft

Date on market2026-04-02T00:00:00.000Z