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  • MLS® #: A11896953
  • 640 S Mashta Dr
  • Key Biscayne, FL 33149-1735
  • $19,500,000
  • 5 Beds, 5 Bath, 3,620 SqFt
  • Residential

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.

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Essential Information

  • MLS® #A11896953
  • Price$19,500,000
  • CAD Dollar$26,690,625
  • UK Pound£14,326,650
  • Euro€16,500,900
  • Bedrooms5
  • Bathrooms5.00
  • Full Baths5
  • Square Footage3,620
  • Year Built1968
  • TypeResidential
  • Sub-TypeSingle Family Residence
  • StyleDetached, Two Story
  • StatusActive

Community Information

  • Address640 S Mashta Dr
  • Area52
  • SubdivisionMASHTA ISLAND
  • CityKey Biscayne
  • CountyMiami-Dade
  • StateFL
  • Zip Code33149-1735

Amenities

  • # of Garages2
  • ViewBay, Ocean
  • Is WaterfrontYes
  • WaterfrontBay Front, Ocean Front

Parking

Circular Driveway, Covered, Driveway

Interior

  • InteriorHardwood, Tile, Wood
  • HeatingCentral
  • CoolingCentral Air
  • # of Stories2
  • StoriesTwo

Appliances

Dryer, Dishwasher, Microwave, Washer

Exterior

  • Exterior FeaturesSecurity/High Impact Doors
  • RoofFlat, Tile
  • ConstructionBlock

School Information

  • ElementaryKeybiscayne
  • MiddlePonce De Leon
  • HighCoral Gables
  • Office: Dls International Realty

Property Location

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640 S Mashta Dr on www.w.jupiteroceanfrontcondos.us

Offered at the current list price of $19,500,000, this home for sale at 640 S Mashta Dr features 5 bedrooms and 5 bathrooms. This real estate listing is located in MASHTA ISLAND of Key Biscayne, FL 33149-1735 and is approximately 3,620 square feet. 640 S Mashta Dr is listed under the MLS ID of A11896953 and has been on the Key Biscayne real estate market for 1 days.

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The data relating to real estate on this web site comes in part from the Internet Data Exchange program of the MLS of the REALTOR® Association of Greater Miami and the Beaches, and is updated as of February 7th, 2026 at 4:32am CST (date/time).

All information is deemed reliable but not guaranteed by the MLS and should be independently verified. All properties are subject to prior sale, change, or withdrawal. Neither listing broker(s) nor Waterfront Properties and Club Communities shall be responsible for any typographical errors, misinformation, or misprints, and shall be held totally harmless from any damages arising from reliance upon these data. © 2026 MLS of RAMB.

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