640 S Mashta Dr, Key Biscayne FL 33149, photo 1
1 / 38

$16,800,000

Single Family ResidenceActive
⏱️ Listed 19 days ago
4Beds
4Baths
3,620Sq Ft
1968Built

640 S Mashta Dr, Key Biscayne FL 33149

MLS #A11990382

About This Property

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

Schedule a Tour

Pick a date and time that works for you

Select a date

Marie I. Sanjurjo
Licensed Broker
Blue Mar Real Estate Group
📞 (305) 680-5672✉️ marie@bluemargroup.com

About Key Biscayne

Key Biscayne is a barrier island community just a bridge ride from Brickell, offering an island lifestyle wrapped around Crandon Park, Cape Florida State Park, and the Crandon Golf Course. The village is known for its safety, top-rated schools, and walkable pace, with residents ranging from young families to international buyers seeking secondary residences. Limited inventory and tight geography keep prices premium relative to mainland Miami.

Explore Key Biscayne📊 Key Biscayne market report

Property Details

Property Type

Single Family Residence

Year Built

1968

Living Area

3,620 sq ft

Lot Size

15,000 sq ft

Bedrooms

4

Bathrooms

4

Garage

2 Spaces

Pool

No

Waterfront

Yes

Cooling

Central Air

Heating

Other

Roof Type

Barrel Roof

Flooring

Other

Construction

Concrete Block Construction

Style

Attached, Other

HOA Fee

None

Annual Taxes

$155,651 (2025)

Days on Market

3

MLS #

A11990382

Features & Amenities

Interior

First Floor EntryEntrance FoyerPantrySplit BedroomVaulted Ceiling(s)Walk-In Closet(s)Garage Converted

Appliances

Dishwasher

Exterior

Other

Community

Public Road

Other

Ocean AccessOcean FrontDrivewayGuest

Nearby Schools

Assigned public schools pulled from Miami-Dade County Public Schools’s official attendance-boundary data. Verify current boundaries with MDCPS before buying — zones can change year to year.

Assigned Public Schools
Elementary
Key Biscayne K-8 Center
Grades PK-8
150 W McIntire St., Key Biscayne 33149
Middle
Ponce de Leon MS
Grades 6-8
5801 Augusto St., Coral Gables 33146
High
Coral Gables Senior High
Grades 9-12
450 Bird Rd., Coral Gables 33146
Private Schools Within 5 Miles
Key Biscayne Presbyterian School1.1 mi
160 Harbor Dr, Key Biscayne
St Agnes Academy1.2 mi
122 Harbor Dr, Key Biscayne
St Christophers - By-The-Sea Montessori School1.2 mi
95 Harbor Dr, Key Biscayne
Immaculata-La Salle High School4.6 mi
3601 S Miami Ave, Miami
Ransom Everglades Middle School5.0 mi
2045 S Bayshore Dr, Miami

School data source: Miami-Dade County Open Data Hub

Similar Homes in Key Biscayne

$15,500,000
Address hidden
4 bd · 5 ba · 4,290 sqft
$14,590,000
Address hidden
4 bd · 5 ba · 6,661 sqft
$19,800,000
Address hidden
4 bd · 9 ba · 8,240 sqft

Location

Loading map…

City

Key Biscayne

State

FL

ZIP Code

33149

County

Miami-Dade County

$16,800,000
640 S Mashta Dr, Key Biscayne FL 33149
4Beds
4Baths
3,620Sq Ft
📞 (305) 680-5672

Listing provided by Brigitte De Langeron at DLS International Realty. Data from Miami Association of REALTORS®. All information deemed reliable but not guaranteed. Listing #A11990382.