For SaleSingle Family ResidenceActive
520 S Mashta Dr
Key Biscayne, FL 33149
$18,500,000
94 Days On Site
- 5Beds
- 4Baths4 full
- 3,085Sq Ft
- $5,997Per Sq Ft
- 0.5083Acres
- 1961Built
- Subdivision
- Mashta Island A Replat Of
- County
- Miami-Dade
- MLS®
- A12071221
Overview
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.
Listing Snapshot
- Price
- $18,500,000
- Days On Site
- 94 Days
- Bedrooms
- 5
- Inside Area (SqFt)
- 3,085 sqft
- Total Baths
- 4
- Full Baths
- 4
- Partial Baths
- 0
- Lot Size
- 0.5083 Acres
- Year Built
- 1961
- MLS® Number
- A12071221
- Status
- Active
- Property Tax
- $201,741 (2026)
- HOA/Condo/Coop Fees
- N/A
- Sq Ft Source
- N/A
Property Details
General Features
11 items
- Direction Faces
- East
- Disclosures
- None
- Garage
- Yes
- Garage Spaces
- 2
- Parking
- Driveway
- Property Sub Type
- Single Family Residence
- Sewer
- Public Sewer
- SqFt Total
- 4,177
- Style
- OneStory
- Water Source
- Public
- Zoning
- 2001
Interior Features
5 items
- Appliances
- Other
- Cooling
- Central Air
- Flooring
- Tile
- Heating
- Central
- Interior
- Master Downstairs
Exterior Features
10 items
- Construction Details
- Block
- Frontage
- 138
- Lot Features
- Waterfront
- Pool Features
- In Ground, Private
- Private Pool
- Yes
- Roof
- Barrel, Spanish Tile
- View
- Bay, Ocean
- Waterfront
- Yes
- Waterfront Features
- Ocean Access, Seawall
- Waterview
- Bay, Ocean
Community Features
3 items
- Community Features
- Other
- MLS Area
- 52
- Financing Terms Available
- Cash, Conventional
Location
520 S Mashta Dr, Key Biscayne, FL 33149 · 52
Neighborhood & Commute
ZIP Code 33149
- Median household income
- $152,895
- Income per person
- $72,459
- Households
- 5,812
- Average household size
- 2.75
- Median age
- 41.6
Source: Walk Score.
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
Schools
- Elementary School
- Keybiscayne
- Middle School
- Ponce De Leon
- High School
- Coral Gables
Price & Status History
- Listing updated with changes from the MLS®
- Price changed to $18,500,000
- Status changed to Active
- Listing first seen on site
Friends & Family
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