Mashta Island 520 S Mashta Dr For Sale, A12071221
520 S Mashta Dr, Key Biscayne, FL 33149
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$19,900,000
for sale
5 beds
4 baths
3,085 sf
/sf
$6,451.00
| Monthly cost | |
| Maintenance per month | $0.000000/ |
| Taxes per year | $201,741 |
| Waterfront | Yes |
| Type | Single Family |
| MLS | A12071221 |
Listing 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 prist...
Listing information courtesy of Coldwell Banker Realty. Source: A-Miami Association of REALTORS. Data updated 08/20/2026.
Facts and Features
Type
Single Family
Year Built
1961
Heating
Central
Cooling
Central Air
Parking
Driveway
Swimming pool
Yes
HOA
$0.000000/
Days on market
3
Status
Active
Features
Bedrooms
Beds: 5
Bedroom Description: At Least 1 Bedroom Ground Level
Design: Attached,One Story
Rooms Description:
Family RoomHeating:
CentralCooling:
Central AirEquipment Appliances:
Other Equipment/AppliancesFlooring
Floor Description: Tile
Interior features:
First Floor Entry, Split Bedroom, Family RoomWater Access:
Private DockLot Description
Lot: 22,140 sqft
Lot depth: 0 ft
Lot frontage: 0 ft
Building
Parking
Parking: Detached garage
Parking description: Driveway
Construction
Construction Type:
Concrete Block ConstructionListing Type:
Exclusive Right To SellProperty Type:
ResidentialStyle:
HouseRoof Description:
Barrel Roof, Curved/S-Tile RoofFinance
Taxes:
$201,741HOA
HOA Fee: $0.000000//mo
Estimated monthly cost
Use this montgage calculator to calculate your monthly montgage payments quickly and easily
Mashta Island Overview
Avg. days on market
75
SF range
2,255-3,620sf
Price range for Sale
$16.8m - 19.9m
Price range for Rent
$21.5k - 75k
Median Sale price per sqft
$6.4k
Median Rent price per sqft
$8.7
Avg. Sale price
$18.4m
Avg. Rent price
$42.7k
