640 S Mashta Dr, Key Biscayne, FL 33149

Key Biscayne
Local realty services provided by:Countywide Properties ERA Powered
640 S Mashta Dr,Key Biscayne, FL 33149
$16,800,000
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  • 4 Beds
  • 4 Baths
  • 3,620 sq. ft.
  • Single family
  • Active
Listed by: brigitte de langeron
Office: dls international realty305-459-3875
MLS#:A11990382
Source:SEFMLS

Price summary

  • Price:$16,800,000
  • Price per sq. ft.:$3,366.73

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
  • Subdivision & Development:MASHTA ISLAND
  • Listing ID #:A11990382
  • Updated:October 09, 2026 at 10:04 AM

Rooms and interior

  • Bedrooms:4
  • Total bathrooms:4
  • Full bathrooms:4
  • Dining Description:Breakfast Area, Dining Area, Living/Dining Room
  • Bathrooms Description:Dual Sinks
  • Kitchen Description:Dishwasher, Pantry
  • Bedroom Description:Split Bedroom, Walk-In Closets
  • Living area:3,620 sq. ft.

Heating and cooling

  • Cooling:Central Air
  • Central air:Yes

Structure and exterior

  • Roof:Barrel
  • Year built:1968
  • Building area:3,620 sq. ft.
  • Lot area:0.34 Acres
  • Lot Features:Flood Zone
  • Construction Materials:Block

Schools

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

Utilities

  • Water:Public
  • Sewer:Public Sewer

Finances and disclosures

  • Price:$16,800,000
  • Price per sq. ft.:$3,366.73
  • Tax amount:$155,651 (2025)

Features and amenities

  • Appliances:Dishwasher
  • Amenities:Pantry, Vaulted Ceilings
  • Pool features:In Ground, Pool

Parking

  • Parking description:Attached, Driveway, Garage, Garage Door Opener, Guest
  • Garage:Yes
  • Garage spaces:2
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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