$18,500,000

BRING ALL OFFERS! Exceptional waterfront opportunity in prestigious Key Biscayne. Set on a 15,000 sq. ft. lot with 100 feet of water frontage, this residence offers open-water views, direct Biscayne Bay access, and no fixed bridges to the ocean. Currently undergoing a complete renovation, it will feature modern finishes, impact… Read More windows and doors, new systems, spacious living areas, a chef's kitchen, and luxurious bathrooms. Enjoy a private dock, deep-water access, pool, breathtaking sunsets, and an unmatched boating lifestyle in one of South Florida's most desirable communities One of the most compelling waterfront opportunities currently available in all of Key Biscayne. Perfectly positioned on the exclusive and highly coveted Mashta Island, this exceptional property offers approximately 100 feet of prime waterfront, deep-water dockage, direct Biscayne Bay access, and no fixed bridges to the Atlantic Ocean, creating an unparalleled opportunity for boating enthusiasts and yacht owners. Mashta Island has long been recognized as one of South Florida's most prestigious residential enclaves, offering exceptional privacy, quiet tree-lined streets, oversized waterfront estates, and immediate access to the open waters of Biscayne Bay while remaining only minutes from Brickell, Downtown Miami, Coconut Grove, Coral Gables, Miami Beach, and Miami International Airport. Very few neighborhoods offer this combination of island living, security, boating lifestyle, and proximity to the city's financial and cultural centers. The residence is currently on renovation designed to transform the property into a contemporary waterfront estate while preserving the exceptional value of its location and oversized waterfront parcel. This is substantially more than a cosmetic renovation. The project includes major improvements throughout the residence, including redesigned living spaces, upgraded electrical and plumbing systems, new HVAC equipment, impact-resistant windows and doors, premium flooring, modern architectural lighting, designer finishes, and a completely reimagined interior intended to meet today's luxury lifestyle expectations. Upon completion, the home is anticipated to offer spacious entertaining areas, beautifully appointed bedroom suites, bathrooms, an impressive chef's kitchen featuring custom cabinetry, premium appliances, elegant countertops, and thoughtfully designed indoor-outdoor living spaces that maximize the spectacular waterfront setting. The property's exceptional orientation provides beautiful water views and unforgettable sunsets while creating an ideal environment for entertaining, family gatherings, and year-round outdoor living. The expansive backyard offers generous space surrounding the swimming pool together with multiple areas for outdoor dining, lounging, and enjoying the waterfront lifestyle that has made Key Biscayne one of the most desirable residential communities in South Florida. For boating enthusiasts, few properties can offer the combination of oversized waterfront, private dockage, deep-water access, and unrestricted navigation to Biscayne Bay and the Atlantic Ocean without fixed bridges. Whether accommodating a large sport yacht, cruising yacht, center console, or multiple vessels, the waterfront configuration provides flexibility rarely available in today's market. Key Biscayne continues to be recognized as one of South Florida's most exclusive island communities, celebrated for its pristine beaches, excellent schools, private clubs, marinas, tennis facilities, parks, bicycle paths, restaurants, and relaxed coastal lifestyle. Residents enjoy the unique advantage of living within a peaceful island environment while remaining only a short drive from Miami's world-class shopping, fine dining, cultural institutions, private airports, international business centers, and professional sports venues. The supply of premium waterfront homes on Mashta Island remains extremely limited due to the neighborhood's established character and finite number of waterfront parcels. As a result, opportunities to acquire large waterfront lots with substantial dockage and direct ocean access continue to be highly sought after by both domestic and international buyers. The combination of location, waterfront dimensions, boating accessibility, oversized lot, and comprehensive renovation creates a property with exceptional long-term appeal. Showings are strictly by appointment with the Listing Agent.. All measurements, dimensions, lot size, square footage, waterfront frontage, dock dimensions, room sizes, zoning, taxes, permits, specifications, plans, renderings, and property information are believed to be accurate but are not guaranteed and should be independently verified by Buyer. Renderings, conceptual plans, floor plans, specifications, and construction updates are available upon request when applicable. This offering represents an extraordinary opportunity to secure one of Key Biscayne's waterfront residences . Whether as a primary residence, seasonal retreat, or long-term investment, this property combines one of South Florida's most desirable locations with an outstanding boating lifestyle and exceptional future value. Bring All Offers. Read Less

Courtesy of Coldwell Banker.

Listing Snapshot | Source HomeJunction

Days Online

Last Updated

Aug 24, 2026

Property Type

Single Family Residence

Beds

Full Baths

Partial Baths

Square Ft.

2,255

Lot Size

0.34 Acres

Year Built

1958

MLS Number

B26058354

30 Days Snapshot Of 33149

$3.17M

-4%

(avg) sold price

-33%

homes sold

-10%

(avg) days on market

Snapshot

Area Map

Additional Details | Source HomeJunction

Appliances & Equipment

Appliances: Electric Water Heater, Dishwasher, Dryer, Free-Standing Freezer, Microwave, Refrigerator, Self Cleaning Oven, Wall Oven, Washer

Building

Living Area: 2255, Construction Materials: Concrete Block Construction, Brick, Direction Faces: East, Levels: 1, Stories: 1, Year Built: 1958, Year Built Details: Resale, Building Area Total: 3720, Entry Location: Foyer, Furnished: Unfurnished, Structure Type: House

Cooling

Cooling: Central Air

Dining Room

Features: Dining/Living Room

Exterior Features

Patio/Porch: Patio

Floors

Flooring: Concrete, Tile

Garage

Garage Is Attached, Carport Spaces: 2, Covered Spaces: 2

Water Features

Water Source: Public

Heating

Heating: Central, Electric

Home Owner's Association

Amenities: Boat Dock, Private Pool

Interior Features

Features: Entrance Foyer, Walk-In Closet(s)

Lot

Acres: 0.34, Square Feet: 15000, Frontage Length: 100, Features: 1/4 To Less Than 1/2 Acre Lot, Less Than 1 Acre

Primary Bedroom

Features: Dual Sinks

Energy Saving

Green Energy Efficient: Appliances, HVAC

Miscellaneous

Inclusions: Dock Available, Private Dock, Unrestricted Salt Water Access, Electric Available, Private Dock, Other Structures: Livable

Parking

Open Parking, Parking Total: 8, Features: 2 Or More Spaces, Circular Driveway, Driveway

Pool

Private Pool, Pool Features: Equipment Stays

Property

Leasable Area Units: Square Feet, Property Condition: Substantially Remodeled, Updated/Remodeled, Completely Renovated, View, View: Bay, Intracoastal View, Pool, Water, Bay View, Waterfront, Waterfront Features: Intracoastal Front, Navigable Water, Ocean Access, Seawall

Roof

Roof: Comp Shingle Roof, Shingle

Sewer

Sewer: Public Sewer, Public Sanitation, Sewer

Taxes

Parcel Number: 24-52-05-008-0070, Tax Annual Amount: $112,485, Tax Legal Description: MASHTA ISLAND PB 60-93 LOT 7 BLK 1 LOT SIZE 100.000 X 150 OR 17980-3315 0198 4, Tax Year: 2025

Utilities

Utilities: Electricity Available, Sewer Available, Water Available

Windows

Features: Complete Impact Glass

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