640 S Mashta Dr, Key Biscayne, FL 33149

Local realty services provided by:Better Homes and Gardens Real Estate Florida 1st
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:February 14, 2026 at 10:58 AM

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)
Information deemed reliable but not guaranteed. Information is provided, in part, by Greater Miami MLS. This information being provided is for consumer's personal, non-commercial use and may not be used for any other purpose other than to identify prospective properties consumers may be interested in purchasing.

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