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631 N Mashta Drive

Key Biscayne, FL 33149
  • $18,500,000
  • STATUS: Active
  • ON SITE: 16 Days
  • MLS #: B26058354
UPDATED: 36 min ago
$18,500,000
  • 4
    BEDS
  • 1/4 to 1/2 Acre
    ACRES
  • 4
    BATHS
  • 1
    1/2 BATHS
  • 2,255
    SQFT
  • $8,204
    $/SQFT
Neighborhood:
Type:
Single-Family Home
Built:
1958
County:
Area:

School Information

Elementary School:
Middle School:
High School:

Description

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 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 esta

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All listings featuring the BMLS logo are provided by BeachesMLS Inc. Copyright ©2026 BeachesMLS, Inc.
IDX information is provided exclusively for consumers' personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. This information is not verified for authenticity or accuracy and is not guaranteed. Data last updated 2026-08-16T17:34:21.863.
www.bradleyhurst.com/homes/179449032
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631 N Mashta Drive Key Biscayne, FL 33149

  • Price: $18,500,000
  • Status: Active
  • On Site: 16 Days
  • Updated: 36 min ago
  • MLS #: B26058354
4
Beds
4
Baths
1
½ Baths
1/4 to 1/2 Acre
Acres
2,255
SQFT
$8,204
$/SQFT
1958
Built
Neighborhood:
Mashta Island
County:
Miami-Dade
Area:
Key Biscayne
Elementary School:
Key Biscayne K-8
Middle School:
Ponce De Leon
High School:
Coral Gables
Property Description
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 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 esta
Exterior Features

Carport Spaces 2 Carport YN Yes Construction Materials Brick Concrete Covered Spaces 2 Exterior Features Garden Outdoor Living Area Garage YN No Parking Features Attached Carport Circular Driveway Carport Driveway Parking Total 8 Patio And Porch Features Covered Patio Rooftop Pool Features In Ground Pool Equipment Pool Private YN Yes Roof Shingle Window Features Storm Window(s)

Interior Features

Appliances Cooktop Dryer Dishwasher ENERGY STAR Qualified Dishwasher ENERGY STAR Qualified Dryer ENERGY STAR Qualified Freezer ENERGY STAR Qualified Refrigerator ENERGY STAR Qualified Washer Electric Cooktop Electric Water Heater Free- Standing Freezer Microwave Oven Refrigerator Water Heater Wine Refrigerator Washer Building Area Total 3720 Cooling Central Air Cooling YN Yes Fireplace YN No Flooring Concrete Laminate Tile Furnished Unfurnished Heating Central Electric Heating YN Yes Interior Features Dual Sinks Entrance Foyer Living / Dining Room Walk- In Closet(s) Laundry Features Inside Laundry Room Laundry Tub Sink Levels One Main Level Bathrooms 4 Main Level Bedrooms 4 Rooms Total 4

Property Features

Association YN No Direction Faces East Frontage Length 100.00 Frontage Type Waterfront Listing Terms Cash Conventional Lot Features 1 /4 to 1 /2 Acre Lot Sprinklers Automatic Sprinkler System Membership Equity YN False Membership Fee New Construction YN No Occupant Type Vacant Pets Allowed No Pet Restrictions Yes Property Condition Resale Updated / Remodeled Property Sub Type Single Family Residence Property Sub Type Additional Single Family Residence Restrictions See Remarks Senior Community YN No Sewer Public Sewer Special Listing Conditions Standard Stories 1 Stories Total 1 Tax Annual Amount 112485 Tax Year 2025 Utilities Electricity Connected Sewer Connected Water Connected View Bay Intercoastal Pool Water View YN Yes Water Source Public Waterfront Features Bayfront Intracoastal Access Navigable Water No Fixed Bridges Ocean Access Seawall Waterfront YN Yes

Listing provided courtesy of Coldwell Banker: . Listing information © 2026 BeachesMLS


All listings featuring the BMLS logo are provided by BeachesMLS Inc. Copyright ©2026 BeachesMLS, Inc.
IDX information is provided exclusively for consumers' personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. This information is not verified for authenticity or accuracy and is not guaranteed. Data last updated 2026-08-16T17:34:21.863.
 
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Jupiter FL, 33458