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640 S Mashta Dr Key Biscayne, FL $ 16,800,000
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$ 16,800,000 Get more info
640 S Mashta Dr
$ 16,800,000
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640 S Mashta Dr

Key Biscayne, FL, 33149
$ 16,800,000
Bedrooms4 Baths4.0 Sq 3,620

Monthly Estimate*

$ 103,440

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Single Family Home for sale in Key Biscayne, FL

for $16,800,000 with 4 bedrooms and 4 full baths. This 3,620 square foot home was built in 1968.

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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Single Family Active

Price

$ 16,800,000

Bedrooms

4

Full Bath

4

Property Type

Single Family

Taxes

$ 155,651

Style

Year Built

1968

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A11990382
Features
General
Sewer Public Sewer
Heating Other
Cooling Central Air
Utilities Cable Available
Possession Close Of Escrow
Roof Barrel
Appliances Dishwasher
Garage Spaces 2
Architectural Style Other
Pool Features In Ground Pool
Restrictions OK To Lease
Construction Materials Block
Pets Allowed Dogs OK Yes
Year Built 1968
View Bay Garden
Property Subtype Single Family Residence
Tax Year 2025
Waterfront Features Ocean Front
County Miami-Dade
Property Type Residential
Attached Garage true
Subdivision Name MASHTA ISLAND
Facing Direction East
Garage Y/N true
Total Rooms 0
Full Baths 4
Special Listing Conditions Listed As-Is
Status Active
High School Coral Gables
City Key Biscayne
Senior Community Y/N false
Zoning Description 2001
MLS Area 52
Lot Size Units Square Feet
Lot Size Square Feet 15000
Listing Terms Cash Conventional
Elementary School Keybiscayne
Year Built Details Resale
Tax Annual Amount 155651
Middle/Junior High School Ponce De Leon
Lease Considered Y/N false
Virtual Tour https://www.propertypanorama.com/instaview/mia/A11990382
Standard Status Active
Occupancy Type Call Agent
Property Sub Type Additional Single Family Residence
Legal Description MASHTA ISLAND PB 60-93 LOT 9 BLK 3 LOT SIZE 100.000 X 150 OR 18642-3922 0599 1
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Interior
Interior Amenities Bedroom on Main Level Breakfast Area Dining Area Dual Sinks Entrance Foyer First Floor Entry Living/Dining Room Pantry Split Bedrooms Vaulted Ceiling(s) Walk-In Closet(s)
Flooring Other
Air Conditioning Y/N true
Half Baths 0
Total Bedrooms 4
Total Baths 4
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Exterior
Exterior Amenities Other
Parking Features Attached Driveway Garage Guest Garage Door Opener
Lot Features < 1/4 Acre
Water Source Public
Lot Size Area 15000
Building Area Total 4990
Frontage Length 100
Waterfront Y/N true
Covered Spaces 2
Road Frontage Type City Street
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* Excluded Features
List By
Dls International Realty

Broker

brigitte@miamiwaterfront.com

Email

Affordability Calculator

$116,411
Per Month
89%
11%
0%
Monthly Principal & Interest
$103,440
Monthly Property Taxes
$12,971
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
3062566 Elementary School
4268812 Middle School
Coral Gables High School High School
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Pricing History
Date Price Price Change Description
4/3/2026 $16,800,000 Listed Price

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640 S Mashta Dr, Key Biscayne, FL, 33149 is a Single Family Home for sale at $16,800,000 with 3,620 sqft. 640 S Mashta Dr has 4 bedrooms, 4.0 baths, and was built in 1968. The property's zip code is 33149 which is in Key Biscayne, FL

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