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USAFLKey BiscayneMashta Island, Mashta Island640 S Mashta Dr
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640 S Mashta Dr, Key Biscayne, FL

House

For Sale

Listed price in listed location currency (USD).
$19,500,000

550
  • Key Facts
  • Description
  • Map

Key Facts

Type Single Family Residence
Levels Residential
Size 3620 sqft
Garage Yes
Taxes $81,859
Days Active 10
Lot Size 
Approx. Age 1968
Avg. Price Per Sqft $5,386
MLS® Number A11896953

Property Address: 640 S Mashta Dr, Key Biscayne, FL, 33149-1735

Average square foot calculated using Size range provided by listing agent.

Description

Welcome to your own slice of paradise! Enjoy breathtaking sunsets from your private dock on this waterfront property boasting 100 feet of direct Biscayne Bay frontage. Ideally located on Mashta Island. Set on a 15, 000 SF lot, the home features 5 beds, 5 baths, including 2 bayfront primary suites with stunning views, impact windows and doors throughout. The open-concept layout flows seamlessly from the living and dining areas to the modern kitchen and out to the pool and entertainment patio, with floor-to-ceiling glass doors that open to blend indoor and outdoor living. Tranquil guest suite upstairs offering privacy and views. It also features an oversized 2-car garage, covered parking, and a spacious driveway for guests. Perfect to move in, renovate, or build your dream waterfront estate.
MLS® NumberA11896953
Laundry Level
Central VacNo
FireplaceNo
Acreage
Exterior
GarageYes
Approx. Age1968
Basement
DrivewayCircular Driveway, Covered, Driveway
Garage Spaces
Heat
A/C
Heating Fuel

Extras

Private Dock, Unrestricted Salt Water Access

Similar Listings

Price History

-End Date
Not Sold YetSold Price

For Sale

Oct 16, 2025List Date
$19,500,000List Price
Sep 20, 2024End Date
$12,375,000Sold Price

Sold

Jun 25, 2024List Date
$13,250,000List Price
Feb 7, 2025End Date
$20,000Sold Price

Leased

Oct 5, 2024List Date
$22,000List Price

Home Appraisal

This property is estimated to sell between: $4,843,000 and $26,829,000.
Similar properties in this area sold on average for: $4,843,750
Expected to sell in 104 days. Similar properties sold in 114 days. This home has been on eXp Commercial Brokerage for 10 days.

The estimated sale price does not take into account many variables such as recent renovations, type of appliances, school district etc. To get a more accurate estimate please contact agent.

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Starting Address
Destination Address
640 S Mashta Dr, Key Biscayne, FL

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