640 S Mashta Dr

Key Biscayne, FL 33149

$16,800,000
Price
4
Beds
3,620 Sq. Ft.
$4,641 / Sq. Ft.
3,620
Sq. Ft.
$4,641
per Sq. Ft.
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Description

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...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

Property Details for 640 South Mashta Drive

Subdivision
MASHTA ISLAND
Style
WF/Pool/Ocean Access
Waterfront
Yes
Waterfront Description
Ocean Front
View
Bay, Garden View
Area
52
Auction
No
Sq Ft Total
4990
LISTING UPDATED: 04/05/2026 04:50 PM

Property Details for 640 South Mashta Drive

StatusActive
MLS #A11990382
Days on Market47
Taxes$155,651 / year
HOA Fees-
Condo/Co-op Fees-
Property TypeSingle Family
MLS TypeSingle Family / Single
Year Built1968
Lot Size0.34 AC / 15,000 SF
CountyMiami-Dade County
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Location

Listing Courtesy of DLS International Realty
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Building Information for 640 South Mashta Drive

Stories-Year Built1968Building Size-Lot Size0.34 AC / 15,000 SF

Payment Calculator

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$96,687 per month

30 year fixed, 6.36% Interest

Principal and Interest

$83,716

Property Taxes

$12,971

HOA Dues

$0

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Property Information for 640 South Mashta Drive

Location Information
Schools
  • Elementary School: Keybiscayne
  • Middle School: Ponce De Leon
  • Senior High School: Coral Gables
Location Information
  • Parcel Number Free Text: 24-52-05-008-0320
  • Parcel Number MLX: 0320
  • MLS Area: 52
  • Municipal Code: 24
  • Township Range: 52
  • Section: 5
  • Subdivision Number: 8
  • Subdivision Complex Bldg: MASHTA ISLAND
  • Zoning Information: 2001
General Information
Parking
  • Num Garage Spaces: 2
  • Garage Description: Attached
  • Parking Description: Driveway, Guest Parking
General Information
  • Front Exposure: East
  • Housing Older Persons Act: No HOPA
  • Approximate Lot Size: 15000
  • Property Sq Ft: 15000
  • Lot Description: Less Than 1/4 Acre Lot
  • Waterfront Frontage: 100
  • Water Access: Dock Available
  • Pool: Yes
  • Pool Description: Below Ground Pool
  • Pool Dimensions: 0
  • Design: Attached
  • Design Description: Other
  • Construction: Concrete Block Construction
  • Construction Type: Concrete Block Construction
  • Roof Description: Barrel Roof
  • Flooring: Other Floors
  • Floor Description: Other Floors
  • Virtual Tour: https://www.propertypanorama.com/instaview/mia/A11990382
Room Information
Room Information
  • Rooms Description: Garage Converted
  • Bedroom Description: At Least 1 Bedroom Ground Level, Primary Bath Shower, Primary Bath Tub
  • Master Bathroom Description: 2 Primary Bathrooms, Dual Sinks
  • Master Bath Features: 2 Primary Bathrooms, Dual Sinks
  • Dining Description: Breakfast Area, Dining/Living Room, L Shaped Dining
Additional Property Information
Utilities
  • Heating Description: Other
  • Cooling Description: Central Cooling
  • Water Description: Municipal Water
  • Sewer Description: Municipal Sewer
  • Cable Available: Yes
Additional Property Information
  • Pets Allowed: Yes
  • Pets Allowed: Yes
  • Pet Restrictions: Dog Ok
  • Guest Accommodations: No
  • Room Count: 0
  • Interior Features: First Floor Entry, Foyer Entry, Pantry, Split Bedroom, Vaulted Ceilings, Walk-In Closets
  • Equipment Appliances: Automatic Garage Door Opener, Dishwasher
  • Exterior Features: Other
  • Subdivision Information: Public Road
Financial Information
Financial Information
  • Type of Association: None
  • Flood Zone: AE
  • Tax Year: 2025
  • Tax Information: Tax Reflects No Exemptions
  • Special Information: As Is

Property History for 640 South Mashta Drive

DateEvent & SourcePriceAppreciation
Apr 2, 2026

Listed (Active)

MiamiRE #A11990382

$16,800,000—
Mar 26, 2026

Cancelled

MiamiRE #A11896953

—
Oct 15, 2025

Listed (Active)

MiamiRE #A11896953

$19,500,000—
DateEvent & SourcePrice
04/02/2026

Listed (Active)

MiamiRE #A11990382

$16,800,000
03/26/2026

Cancelled

MiamiRE #A11896953

—
10/15/2025

Listed (Active)

MiamiRE #A11896953

$19,500,000

For completeness, we often displays two records for one sale: the MLS record and the public record.

Public Records for 640 South Mashta Drive

Taxable ValueLand$9,300,000Additions$610,420Total$9,910,420
Tax Record2025$155,731 ($12,978 / month)
Home Facts
Beds4Total Finished SqFt3,620 SqFtAbove Grade Finished SqFt3,620 SqFtStories2Lot Size15,000 SqFtStyleSingle Family ResidenceYear Built1968Year Renovated1990Zoning2001CountyMIAMI-DADEAPN24-5205-008-0320

Schools near 640 South Mashta Drive

This home is within Miami-Dade County Public Schools.
Rating
School
Type
Grades
Distance
Air Base K-8 Center for International Education
Public - PK to 8
Key Biscayne K-8 Center
Public - PK to 8
Ponce De Leon Middle School
Public - 6 to 8
Robert Morgan Voc-Tech Institute
Public - 9 to 12
Rating
School
Distance
Air Base K-8 Center for International Education
PublicPK to 8

Key Biscayne K-8 Center
PublicPK to 8

Ponce De Leon Middle School
Public6 to 8

Robert Morgan Voc-Tech Institute
Public9 to 12

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

Key Biscayne
Key Biscayne
Lush natural beauty, sunny bike paths, and colorful works of art. On an island just below Miami Beach, the Village of Key Biscayne is a pocket of paradise. This charming neighborhood is nestled between two state parks, the Atlantic Ocean, and Biscayne Bay. Although the Village’s former coconut...
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More information about 640 South Mashta Drive, Key Biscayne, FL 33149

640 South Mashta Drive is a single family home for sale in Key Biscayne, FL 33149. This property was listed for sale on April 2, 2026 by DLS International Realty, it's currently listed at $16,800,000. It has been on the market for a total of 47 days and was last sold on October 16, 2024. This listing's school district is Miami-Dade County Public Schools. Nearby schools include Air Base K-8 Center for International Education, Key Biscayne K-8 Center and Ponce De Leon Middle School. 640 South Mashta Drive is a 4-bed, 4-bath, 3,620 sqft single family home built in 1968.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties make no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of DLS International Realty

Based on information from one of the following Multiple Listing Services: Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS®. Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.