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640 S Mashta Dr, Key Biscayne, Florida 33149

Active For Sale
$16,800,000
  • Beds 4
  • Baths 4
  • Sq Ft 3,620 Sqft
  • Visits: 1 in 2 days

Description

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

Features

  • Swimming Pool: Pool, In Ground
  • Heating System: Other
  • Cooling System: Central Air
  • Pet Policy: Yes, Dogs Ok
  • Parking: Driveway, Garage, Garage Door Opener, Attached, Guest

Appliances

  • Appliances: Dishwasher

Address Map

  • Country: US
  • State: FL
  • County: Miami-Dade
  • City: Key Biscayne
  • Subdivision: MASHTA ISLAND
  • Zipcode: 33149
  • Street: Mashta Dr
  • Street Number: 640
  • Floor Number: 0
  • Longitude: W81° 49' 31.4''
  • Latitude: N25° 41' 5.1''
  • Street Dir Prefix: S
  • MLS Area: 52

MLS Addon

  • Architectural Style: Other
  • Association Fee: $0
  • Close Price: $0
  • Elementary School: Keybiscayne
  • Exterior Features: Other
  • Flooring: Other
  • Garage Spaces: 2
  • High School: Coral Gables
  • Insurance Expense: $0
  • Interior Features: Bedroom on Main Level, Breakfast Area, Dual Sinks, First Floor Entry, Living/Dining Room, Entrance Foyer, Walk-In Closet(s), Pantry, Split Bedrooms, Dining Area, Vaulted Ceiling(s)
  • Listing Terms: Cash, Conventional
  • Lot Features: < 1/4 Acre
  • Middle Or Junior School: Ponce De Leon
  • New Taxes Expense: $0
  • Road Frontage Type: City Street
  • Tax Annual Amount: $155,651
  • Tax Year: 2025
  • Utilities: Cable Available
  • Water Front Features: Ocean Front

Location

Listing Updated: 2026-04-03 18:35:14

  • Property Type : Single Family
  • Property Sub Type : Single Family Residence
  • Listing Type : For Sale
  • Listing ID : A11990382
  • Price : $16,800,000
  • View : Bay, Garden
  • Bedrooms : 4
  • Bathrooms : 4
  • Full Bathrooms : 4
  • Half Bathrooms : 0
  • Square Footage : 3,620 Sqft
  • Year Built : 1968
  • Lot Area : 0 Acre
  • Listing Status : Active
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