640 S Mashta Dr, Key Biscayne, FL 33149

Local realty services provided by:Better Homes and Gardens Real Estate Destinations
640 S Mashta Dr,Key Biscayne, FL 33149
$19,500,000
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  • 5 Beds
  • 5 Baths
  • 3,620 sq. ft.
  • Single family
  • Active
Listed by: claudia fontecilla
Office: dls international realty
MLS#:A11896953
Source:SEFMLS

Price summary

  • Price:$19,500,000
  • Price per sq. ft.:$3,907.82

About this home

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.

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Home facts

  • Year built:1968
  • Listing ID #:A11896953
  • Updated:December 17, 2025 at 12:44 PM

Rooms and interior

  • Bedrooms:5
  • Total bathrooms:5
  • Full bathrooms:5
  • Living area:3,620 sq. ft.

Heating and cooling

  • Cooling:Central Air
  • Heating:Central

Structure and exterior

  • Roof:Flat, Tile
  • Year built:1968
  • Building area:3,620 sq. ft.
  • Lot area:0.34 Acres

Schools

  • High school:Coral Gables
  • Middle school:Ponce De Leon
  • Elementary school:Keybiscayne

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$19,500,000
  • Price per sq. ft.:$3,907.82
  • Tax amount:$81,859 (2024)
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