520 S Mashta Drive
Key Biscayne, FL 33149
$18,500,000
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.
| MLS#: | A12071221 |
|---|---|
| Status: | Active |
| Living Area: | 3,085 |
| Waterfront?: | Yes |
| Association: | Mashta Island A Replat Of |
| Year Built: | 1961 |
| Amenities: | Other |
| Covered Spaces: | 2.0 |
| Direction Faces: | East |
| Elementary School: | Key Biscayne K-8 |
| Frontage Type: | Waterfront |
| Garage Spaces: | 2.0 |
| High School: | Coral Gables |
| Interior Features: | MainLevelPrimary, SplitBedrooms |
| Levels: | One |
| Financing Type: | Cash, Conventional |
| Parking Features: | Driveway |
| Pool Private?: | Yes |
| Zoning: | 2001 |
| Price: | $18,500,000.00 |
|---|---|
| Property Type: | SingleFamilyResidence |
| Total Area: | 4177.0 |
| Waterfront Type: | Bayfront, OceanAccess, Seawall |
| Flooring: | Tile |
| Frontage Length: | 138.00 |
| Garage?: | Yes |
| Lot Size Area: | 22140.0 |
| Middle School: | Ponce De Leon |
| New Construction?: | No |
| Pool Features: | InGround |
| Stories: | 1 |
| View: | Bay, Ocean |
Listing Courtesy of: Coldwell Banker Realty
Listing Agent: Maureen Jauregui
305-798-3124
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BeachesMLS data last updated on November 02, 2026 01:37 AM - ET
Property Last Updated: November 02, 2026 01:37 AM - ET





































