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640 S Mashta Dr Key Biscayne, FL $ 19,500,000
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$ 19,500,000 Get more info
640 S Mashta Dr
$ 19,500,000
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Share Save

640 S Mashta Dr

Key Biscayne, FL, 33149
$ 19,500,000
Bedrooms5 Baths5.0 Sq 3,620

Monthly Estimate*

$ 121,655

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Single Family Home for sale in Key Biscayne, FL

for $19,500,000 with 5 bedrooms and 5 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

$ 19,500,000

Bedrooms

5

Full Bath

5

Property Type

Single Family

Taxes

$ 81,859

Style

Year Built

1968

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A11896953
Features
General
Sewer Public Sewer
Heating Central
Cooling Central Air
Possession Closing & Funding
Roof Flat Tile
Appliances Dryer Dishwasher Microwave Washer
Garage Spaces 2
Architectural Style Detached Two Story
Pool Features In Ground Pool
Restrictions OK To Lease
Construction Materials Block
Year Built 1968
View Bay Ocean
Stories Count 2
Levels Two
Property Subtype Single Family Residence
Tax Year 2024
Waterfront Features Bayfront Ocean Front
County Miami-Dade
Property Type Residential
Subdivision Name MASHTA ISLAND
Facing Direction East
Garage Y/N true
Total Rooms 0
Full Baths 5
Special Listing Conditions Listed As-Is
Status Active
High School Coral Gables
City Key Biscayne
Disclosures Owner Is Listing Agent
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 81859
Middle/Junior High School Ponce De Leon
Lease Considered Y/N false
Virtual Tour https://www.propertypanorama.com/instaview/mia/A11896953
Standard Status Active
Occupancy Type Tenant
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 Built-in Features Bedroom on Main Level First Floor Entry
Flooring Hardwood Tile Wood
Air Conditioning Y/N true
Heating Y/N true
Half Baths 0
Total Bedrooms 5
Total Baths 5
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Exterior
Exterior Amenities Security/High Impact Doors
Parking Features Circular Driveway Covered Driveway
Lot Features < 1/4 Acre
Water Source Public
Lot Size Area 15000
Building Area Total 4990
Frontage Length 0
Waterfront Y/N true
Covered Spaces 2
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* Excluded Features
List By
Dls International Realty

Broker

Fontecilla.c@gmail.com

Email

Affordability Calculator

$128,476
Per Month
95%
5%
0%
Monthly Principal & Interest
$121,655
Monthly Property Taxes
$6,822
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.375% 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
See complete school information
Pricing History
Date Price Price Change Description
10/22/2025 $19,500,000 Listed Price

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640 S Mashta Dr, Key Biscayne, FL, 33149 is a Single Family Home for sale at $19,500,000 with 3,620 sqft. 640 S Mashta Dr has 5 bedrooms, 5.0 baths, and was built in 1968. The property's zip code is 33149 which is in Key Biscayne, FL

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