Basic Information

  • MLS # A12071221
  • Type Single Family Residence
  • Status Active
  • Subdivision/Complex Mashta Island A Replat Of
  • Year Built 1961
  • Total Size 22,140 Sq.Ft / 0.51 Acre
  • Date Listed 08/17/2026
  • Days on Market 45
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. Plans 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. With 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.

Exterior Features

  • Waterfront Yes
  • Parking Spaces 2
  • Pool Yes
  • View Bay, Ocean
  • Construction Type Block
  • Waterfront Description Bayfront, Ocean Access, Seawall
  • Parking Description Driveway
  • Exterior Features Security High Impact Doors
  • Roof Description Barrel, Spanish Tile
  • Style Single Family Residence

Interior Features

  • Adjusted Sqft 3,085Sq.Ft
  • Cooling Description Central Air
  • Equipment Appliances Other
  • Floor Description Tile
  • Heating Description Central
  • Interior Features Bedroom On Main Level, First Floor Entry, Split Bedrooms
  • Sqft 3,085Sq.Ft

Property Features

  • Address 520 S Mashta Dr
  • Aprox. Lot Size 22,140
  • Architectural Style One Story
  • City Key Biscayne
  • Community Features Other, See Remarks
  • Construction Materials Block
  • County Miami- Dade
  • Covered Spaces 2
  • Direction Faces East
  • Frontage Length 138
  • Furnished Info no
  • Garage 2
  • Listing Terms Cash, Conventional
  • Occupant Type Call Agent
  • Parking Features Driveway
  • Pool Features In Ground, Pool
  • Possession Closing And Funding
  • Postal City Key Biscayne
  • Public Survey Township 24
  • Roof Barrel, Spanish Tile
  • Sewer Description Public Sewer
  • Stories 1
  • HOA Fees $0
  • Subdivision Complex
  • Subdivision Info Mashta Island A Replat Of
  • Tax Amount $201,741
  • Tax Legal desc 5-6 55 42 MASHTA ISLAND A REPLAT OF TRS A & C SELY35FT LOT 16 & ALL LT 17 BLK BLK 3 LOT SIZE 135.000 X 164 OR 15816-1278 1292 1
  • Tax Year 2026
  • Terms Considered Cash, Conventional
  • Type of Property Single Family Residence
  • View Bay, Ocean
  • Water Source Public
  • Year Built Details Resale
  • Waterfront Description Bayfront, Ocean Access, Seawall

520 S Mashta Dr

Key Biscayne, FL 33149

Similar Properties ForSale

    The multiple listing information is provided by the Miami Association of Realtors® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2023-present Miami Association of Realtors®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: Coldwell Banker Realty. tel: 305-361-5722

    Real Estate IDX Powered by: TREMGROUP