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520 S Mashta Dr, Key Biscayne, Florida 33149

Active For Sale
$19,900,000
  • Beds 5
  • Baths 4
  • Sq Ft 3,085 Sqft
  • Visits: 7 in 29 days

Description

Seize a rare opportunity to create a landmark waterfront estate on one of the largest residential lots in Key Biscayne’s exclusive Mashta Island enclave. Spanning an extraordinary 22,140 square feet, this exceptional property offers 138 feet of pristine water frontage and sweeping open water views, providing an unparalleled setting for a world class residence.rnPlans by renowned architect, Pablo Corazzini of Vitalini Corazzini Architects, are available to the buyer, offering a thoughtfully conceived vision that takes full advantage of the property’s remarkable scale, premier waterfront setting, and spectacular sunsets. The proposed design creates an extraordinary canvas for sophisticated indoor-outdoor living and entertaining, should the buyer choose to pursue the concept.rnWith its exceptional lot size, expansive water frontage, and coveted Mashta Island address, this is a truly irreplaceable opportunity to create a legacy estate in one of South Florida’s most prestigious waterfront communities.

Features

  • Swimming Pool: Pool, In Ground
  • Heating System: Central
  • Cooling System: Central Air
  • Parking: Driveway

Appliances

  • Appliances: Other

Address Map

  • Country: US
  • State: FL
  • County: Miami-Dade
  • City: Key Biscayne
  • Subdivision: MASHTA ISLAND A REPLAT OF
  • Zipcode: 33149
  • Street: Mashta Dr
  • Street Number: 520
  • Floor Number: 0
  • Longitude: W81° 49' 37.9''
  • Latitude: N25° 41' 0.1''
  • Street Dir Prefix: S
  • MLS Area: 52

MLS Addon

  • Architectural Style: One Story
  • Association Fee: $0
  • Close Price: $0
  • Elementary School: Keybiscayne
  • Exterior Features: Security/High Impact Doors
  • Flooring: Tile
  • Garage Spaces: 2
  • High School: Coral Gables
  • Insurance Expense: $0
  • Interior Features: Bedroom on Main Level, First Floor Entry, Split Bedrooms
  • Middle Or Junior School: Ponce De Leon
  • New Taxes Expense: $0
  • Stories: 1
  • Tax Annual Amount: $201,741

Location

Listing Updated: 2026-08-30 02:05:16

  • Property Type : Single Family
  • Property Sub Type : Single Family Residence
  • Listing Type : For Sale
  • Listing ID : A12071221
  • Price : $19,900,000
  • View : Water
  • Bedrooms : 5
  • Bathrooms : 4
  • Full Bathrooms : 4
  • Half Bathrooms : 0
  • Square Footage : 3,085 Sqft
  • Year Built : 1961
  • Lot Area : 0 Acre
  • Listing Status : Active
  • Days On Market : 28
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