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Ocean AccessOcean Front
640 Mashta Dr
Key Biscayne, FL, 33149
$19.5M
5
Bedrooms
5
Bathrooms
3,620 sqft
Living Area
1968
Year Built
Dock & Water Access
Dock Amenities
Waterfront Features
Ocean AccessOcean Front
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 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.
Location
Key Biscayne, FL, 33149
Listing courtesy of DLS International Realty
Last updated: 3/21/2026
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Dock Score™
70
Based on dock amenities, ocean access, and waterfront features
Dock Score is a DockOnly.com rating. Not provided by or affiliated with the MLS or listing broker.
Mortgage Calculator
Estimate your monthly payment for this waterfront property
20%
$3,900,000 down
%
Principal & Interest$101,181/mo
Property Tax (est. 1.2%)$19,500/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$120,931
Loan Amount: $15,600,000Rate: 6.75%
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See the property and tour the dock. A waterfront specialist will arrange a private showing and provide dock specs, bridge clearances, and water depth info.
Nearest Bridge Clearances
Florida Keys — critical for tall/large vessels
No bridge data available for this location.
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Lot Size15,000 sqft
Days on Market2