481 S Mashta Drive Key Biscayne, FL $ 19,900,000
481 S Mashta Drive
$ 19,900,000
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481 S Mashta Drive

Key Biscayne, FL, 33149
$ 19,900,000
Bedrooms5 Baths6.1 Sq 5,940

Monthly Estimate*

$ 122,528

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Single Family Home for sale in Key Biscayne, FL

for $19,900,000 with 5 bedrooms and 6 full baths, 1 half bath. This 5,940 square foot home was built in 2017.

Offering approximately 8,500 square feet of construction, this spectacular waterfront estate on coveted Mashta Island is a rare expression of space, privacy, and coastal elegance. Fully remodeled and designed for effortless indoor-outdoor living, this three-level contemporary residence enjoys direct ocean access, panoramic views of Smugglers Cove and Biscayne Bay, and constant ocean breezes that create a true sense of serenity. Set on a 17,012-square-foot lot in one of Key Biscayne’s most exclusive and tranquil enclaves, the property is surrounded by water, light, and lush tropical landscaping, offering remarkable privacy and a peaceful island atmosphere. The residence features 8,544 square feet of total area, including garage and terraces, with expansive open living spaces, refined finishes, abundant natural light, and impeccable craftsmanship throughout. The flexible floor plan allows for effortless reconfiguration to accommodate additional rooms and customized living areas. World-class amenities include a private dock for boating enthusiasts, resort-style pool, summer kitchen, spectacular covered entertainment level, elevator, gym, garage, and extra parking, creating an exceptional setting for both grand entertaining and everyday enjoyment. This is more than a home...it is a private waterfront sanctuary, offering the rare opportunity to experience the very best of island living in one of Key Biscayne’s most prestigious locations.

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Single Family Active

Price

$ 19,900,000

Bedrooms

5

Full Bath

6

Half Bath

1

Property Type

Single Family

Taxes

$ 84,924

Style

Year Built

2017

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A11779615

Features
General
Sewer Public Sewer
Heating Electric
Cooling Electric
Utilities Cable Available
Possession Closing & Funding
Roof Barrel
Appliances Built-In Oven Dryer Dishwasher Electric Range Electric Water Heater Disposal Ice Maker Microwave Refrigerator Washer
Garage Spaces 2
Patio/Porch Features Balcony Open Patio Porch
Pool Features In Ground Pool
Restrictions OK To Lease
Construction Materials Block
Pets Allowed No Pet Restrictions Yes
Year Built 2017
View Canal Water
Levels Three Or More
Property Subtype Single Family Residence
Tax Year 2024
Waterfront Features Canal Access Canal Front Ocean Access
Community Features Home Owners Association
County Miami-Dade
Property Type Residential
Attached Garage true
Subdivision Name SMUGGLERS COVE
Facing Direction South
Garage Y/N true
Total Rooms 0
Full Baths 6
Special Listing Conditions Listed As-Is
Status Active
High School Mast Academy
City Key Biscayne
Disclosures Flood Plain Disclosure
Senior Community Y/N false
Zoning Description 2001
MLS Area 52
Lot Size Units Square Feet
Lot Size Square Feet 17012
Listing Terms Cash Conventional
Elementary School Keybiscayne
Year Built Details Resale
Tax Annual Amount 84924
Lease Considered Y/N false
Standard Status Active
Occupancy Type Tenant
Property Sub Type Additional Single Family Residence
Legal Description 5 55 42 SMUGGLERS COVE PB 78-83 LOT 11 LOT SIZE 17012 SQ FT OR 19428-0237 12/2000 1
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Interior
Interior Amenities Bidet Built-in Features Breakfast Area Closet Cabinetry Dining Area Separate/Formal Dining Room Dual Sinks Entrance Foyer First Floor Entry Pantry Sitting Area in Primary Separate Shower Upper Level Primary Walk-In Closet(s) Elevator
Flooring Ceramic Tile Hardwood Wood
Furnished Y/N Unfurnished
Air Conditioning Y/N true
Heating Y/N true
Window Features Blinds
Half Baths 1
Laundry Features In Garage
Total Bedrooms 5
Total Baths 7
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Exterior
Exterior Amenities Balcony Outdoor Grill Porch Patio
Parking Features Attached Covered Driveway Garage Paver Block Garage Door Opener
Lot Features 1/4 to 1/2 Acre Lot Sprinklers Automatic
Water Source Public
Lot Size Area 17012
Building Area Total 8544
Frontage Length 0
Waterfront Y/N true
Covered Spaces 2
Road Frontage Type City Street
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* Excluded Features
List By
One Sotheby's International Realty

Broker

Brigitte@bnachtigall.com

Email

Affordability Calculator

$129,605
Per Month
95%
5%
0%
Monthly Principal & Interest
$122,528
Monthly Property Taxes
$7,077
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
4808084 Elementary School
315003 Middle School
Mast Academy High School High School
Pricing History
DatePricePrice ChangeDescription
2/11/2026$19,900,000 -4.78% Price Down
1/13/2026$20,900,000 Listed Price

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481 S Mashta Drive, Key Biscayne, FL, 33149 is a Single Family Home for sale at $19,900,000 with 5,940 sqft. 481 S Mashta Drive has 5 bedrooms, 6.1 baths, and was built in 2017. The property's zip code is 33149 which is in Key Biscayne, FL