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520 S Mashta Dr, Key Biscayne, FL 33149

Key Biscayne
Local realty services provided by:CENTURY 21 Circle
520 S Mashta Dr,Key Biscayne, FL 33149
$18,500,000
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  • 5 Beds
  • 4 Baths
  • 3,085 sq. ft.
  • Single family
  • Active
Upcoming open houses
  • Wed, Nov 04
    12:00 pm - 02:00 pm
Listed by: maureen jauregui, emma jauregui
Office: coldwell banker realty305-361-5722
MLS#:A12071221
Source:SEFMLS

Price summary

  • Price:$18,500,000
  • Price per sq. ft.:$4,429.02

About this home

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...

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Home facts

  • Year built:1961
  • Subdivision & Development:MASHTA ISLAND A REPLAT OF
  • Listing ID #:A12071221
  • Updated:October 29, 2026 at 10:07 AM

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:4
  • Full bathrooms:4
  • Flooring:Tile
  • Bedroom Description:Split Bedroom
  • Living area:3,085 sq. ft.

Heating and cooling

  • Cooling:Central Air
  • Heating:Central
  • Central air:Yes

Structure and exterior

  • Roof:Barrel, Spanish Tile
  • Year built:1961
  • Building area:3,085 sq. ft.
  • Lot area:0.51 Acres
  • Lot Features:Flood Zone
  • Architectural Style:One Story
  • Construction Materials:Block
  • Exterior Features:Security High Impact Doors
  • Levels:1 Story

Schools

  • High school:Coral Gables
  • Middle school:Ponce De Leon
  • Elementary school:Keybiscayne

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$18,500,000
  • Price per sq. ft.:$4,429.02
  • Tax amount:$201,741 (2026)

Features and amenities

  • Pool features:In Ground, Pool

Parking

  • Parking description:Driveway
  • Garage:Yes
  • Garage spaces:2
Information deemed reliable but not guaranteed. Information is provided, in part, by Greater Miami MLS. This information being provided is for consumer's personal, non-commercial use and may not be used for any other purpose other than to identify prospective properties consumers may be interested in purchasing. SEFMLS Member Broker: David Cates

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