No photos available
Offered at
$19,900,000
520 S Mashta Drive, Key Biscayne, FL 33149
- 5
- Beds
- 4
- Full Baths
- 3,085
- Sq.Ft.
Listing courtesy of Maureen Jauregui, Coldwell Banker Realty
Property 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.
Overview
At a glance
- Property Type
- Residential
- Property Sub-Type
- Single Family Residence
- Address
- 520 S Mashta Drive, Key Biscayne, FL 33149
- Zoning
- 2001
- MLS ID
- A12071221
- Listing Date
- 2026-08-12
- Last Updated
- 8/26/2026, 11:23:28 PM
- Days on Market
- 28
- Subdivision
- MASHTA ISLAND A REPLAT OF
Features & Amenities
The Details
Interior
- Bedrooms
- 5
- Full Bathrooms
- 4
- Half Bathrooms
- 0
- Flooring
- Tile
- Appliances
- Other
- Interior Features
- Bedroom Layout - Split
Exterior
- Construction
- Block
- Pool
- In Ground
- Parking
- Driveway
- Garage Spaces
- 2
- Water Source
- Public
- Sewer
- Public Sewer
- Cooling
- Central Air
- Heating
- Central
Details
- Building Area
- 4,177 sq.ft.
- Lot Size
- 22,140 sq.ft.
- Lot Size (Acres)
- 0.51 acres
- Subdivision
- MASHTA ISLAND A REPLAT OF
- Stories
- 1
- Year Built
- 1961
- View
- Bay, Direct Ocean
- Waterfront
- Ocean Access, Seawall, Bayfront
- Direction Faces
- East
- County
- Miami-Dade
- Zoning
- 2001
Financial
- List Price
- $19,900,000
- Original List Price
- $19,900,000
- Annual Tax
- $201,741/yr
- Tax Year
- 2026
Location
Inquire
Request a Private Showing
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Learn More →Information & Accuracy
All information provided on this page is deemed reliable but is not guaranteed. Square footage, lot size, room dimensions, year built, taxes, and HOA figures are sourced from the MLS, the seller, or public records, and Aquantis Realty makes no representation or warranty as to their accuracy. All measurements and material facts should be independently verified by the buyer.