640 S Mashta Drive — principal view

Maison Azure — private collection

640 S Mashta Drive

$16,800,000

Key Biscayne, FL

4 bd · 4 ba · 3,620 sf

Bedrooms
4
Bathrooms
4
Living area
3,620 sf
Lot
0.34 ac
Built
1968
Garage
2 cars
Price / sq ft
$4,641

The residence

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

Cinematic tour ↗

Distinctions

Views

  • Garden
  • Bay

Waterfront

  • Ocean Front

Interior

  • Entrance Foyer
  • Pantry
  • Vaulted Ceiling(s)
  • Walk-In Closet(s)
  • Bedroom Layout - Split

Parking

  • Driveway
  • Garage Door Opener
  • Guest
  • Garage
  • Attached Garage
  • Attached

The setting

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Presented by

DLS International Realty · Brigitte De Langeron

Tour this residence privately with Maison Azure — market analysis of Key Biscayne, FL included, no obligation.

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Listing courtesy of DLS International Realty · Brigitte De Langeron

Listing information is provided by BeachesMLS via the Spark Platform. All information is deemed reliable but not guaranteed and should be independently verified. Properties may or may not be listed by the office/agent presenting the information.

Last updated 2026-05-31