520 S Mashta Dr

5-bedroom house for sale in Key Biscayne

$19,900,000

Beds

Baths

Living Area

3085 Sq. Ft

Price per Sq. Ft.

$6451

Living Area м²

287 м²

Price per м²

$ 69 433

Overview:

Living Area 3085 Sq. Ft.

Living Area м² 287 м²

Days On Market 9

Tax Annual Amount 201741

Waterfront 1

Garage Spaces 2

Year Build 1961

MLS# A12071221

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.

Property Features:

Address

FL, Key Biscayne

Street Name

Mashta Dr

Street Number

520

Property Type

Residential / Single Family Residence

View

Bay, Ocean

Architectural Style

OneStory

Flooring

Tile

Water front Features

Bayfront, OceanAccess, Seawall

Cooling

Central Air

Last Modification

2026-08-19 15:44:33

Expand

Exterior Features

Security High Impact Doors

Interior Features

BedroomOnMainLevel
FirstFloorEntry
SplitBedrooms

Appliances

Other

Parking Features

Driveway

Expand

Houses for sale in Key Biscayne

Houses for rent in Key Biscayne

Request a call

Write to us

in any messenger

5-bedroom home for sale in Key Biscayne - 520 S Mashta Dr - MondialRealty

Request video

Watch from the comfort of your home

Houses for sale at Key Biscayne

For Sale / House 520 S Mashta Dr Key Biscayne FL 33149 A12071221 Bed 5 Bath 4 3085 ft.² For Sale $19,900,000

2 hours ago

For Sale / House 524 Warren Ln Key Biscayne FL 33149 A11999112 Bed 5 Bath 4 2700 ft.² For Sale $3,730,000

For Sale / House 224 Sea View Dr 104, Unit 104 Key Biscayne FL 33149 A12061913 Bed 2 Bath 3 1340 ft.² For Sale $1,175,000

For Sale / House 330 Gulf Rd Key Biscayne FL 33149 A12047714 Bed 5 Bath 6 3202 ft.² For Sale $6,490,000

For Sale / House 335 W Enid Dr Key Biscayne FL 33149 A12070117 Bed 5 Bath 6 3495 ft.² For Sale $5,785,000

For Sale / House 241 Cape Florida Dr Key Biscayne FL 33149 A12069861 Bed 8 Bath 9 9159 ft.² For Sale $29,900,000

For Sale / House 631 N Mashta Drive Key Biscayne FL 33149 B26058354 Bed 4 Bath 5 2255 ft.² For Sale $18,500,000

For Sale / House 24 Grand Bay Estates Circle Key Biscayne FL 33149 B26004621 Bed 5 Bath 6 4220 ft.² For Sale $4,950,000

For Sale / House 161 Cape Florida Drive Key Biscayne FL 33149 A12051668 Bed 4 Bath 6 6661 ft.² For Sale $14,990,000

For Sale / House 650 Curtiswood Dr Key Biscayne FL 33149 A12035700 Bed 6 Bath 5 3356 ft.² For Sale $5,199,000

All houses at Key Biscayne