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631 N Mashta Drive, Key Biscayne, FL 33149

$18,500,000
  • 631 N Mashta Drive, Key Biscayne, FL 33149 Main Photo

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New to the Market Active
BEDS4 BATHS4 full 1 partial SQUARE FEET3,720 MLS#B26058354
STATUSActive PROPERTY TYPEResidential - Single Family SUBDIVISIONMASHTA ISLAND

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 est

631 N Mashta Drive | MLS# B26058354

This single family home located at 631 N Mashta Drive, Key Biscayne, FL 33149 is currently listed for sale with an asking price of $18,500,000. This property was built in 1958 and has 4 bedrooms and 4 full and 1 partial baths with 3720 sq. ft. N Mashta Drive is located in the MASHTA ISLAND subdivision. Search MASHTA ISLAND real estate on marisadilenge.realty100.com today.

Property Features

Property Type: Residential - Single Family
Cooling: Central Air
Heating: Central, Electric
Lot Size: 0.34 Acres
Roof Type: Shingle
Stories: 1.0
Taxes: $112,485
Year Built: 1958

Amenities

Entrance Foyer
Walk-In Closet(s)
Garden
Private Rooftop Terrace

Feature Descriptions

Appliances: Electric Water Heater, Cooktop, Dryer, Dishwasher, ENERGY STAR Qualified Dishwasher, ENERGY STAR Qualified Freezer, ENERGY STAR Qualified Refrigerator, ENERGY STAR Qualified Washer, ENERGY STAR Qualified Dryer, Free-Standing Freezer, Microwave, Oven, Refrigerator, Water Heater, Washer, Electric Cooktop, Wine Refrigerator
Carport Spaces: 2
Exterior: Brick, Concrete
Flooring: Concrete, Laminate, Tile
Furnished: Unfurnished
Laundry: Inside, Laundry Room, Sink
Parcel#: 2452050080070
Parking: Attached Carport, Circular Driveway, Driveway, Carport
Parking Notes: Attached Carport, Circular Driveway, Driveway, Carpor
Patio/Porch: Patio - Covered, Patio - Open, Patio
Pets Allowed: Yes, No Restrictions
Pool: In Ground, Equipment Included
Restrictions: See Remarks
Sewer: Public Sewer
Special View Info: Pool, Water, Bay, Intracoastal
Sprinkler: Auto Sprinkler, Zoned Sprinkler
SQFT Living: 2255
Structure Type: House
Swimming Pool: Yes
Total Rooms: 4
Utilities: Electricity Connected, Sewer Connected, Water Connected
Utilities: Electricity Connected, Sewer Connected, Water Connected
Water: Public
Water Frontage: 100
Waterfront Features: No Fixed Bridge, Ocean Access, Navigable Water, Seawall, Bayfront, Intracoastal
Windows: Storm Window(s)

Room Sizes

Living Room: 22 X 16 Level Main
Kitchen: 11 X 12 Level Main
Primary Bedroom: 20 X 25 Level Main
Dining Room: 14 X 12 Level Main

Local Schools

High School: Coral Gables
Middle School: Ponce De Leon
Elementary School: Key Biscayne K-8

Listed By / Shown By

Listed By

Agency Name: Coldwell Banker
Agency Phone: 561-395-2233

Shown By

Agent Name: Marisa DiLenge
Agent Phone: Cell: (954) 258-5885
Agency Title: Realty 100

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Estimated Payment

$ 55,942.56 per month $41,172.98 Principal & Interest $9,373.75 Property Tax $5,395.83 Homeowner's Insurance

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Disclaimer: All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information on this site was last updated 07/30/2026. The listing information on this page last changed on 07/30/2026. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of Delta Media Group MLS (last updated Thu 07/30/2026 12:08:08 AM EST) or Miami MLS (last updated Wed 07/29/2026 11:59:10 PM EST) or Stellar MLS (last updated Wed 07/29/2026 11:59:29 PM EST) or Beaches MLS (last updated Thu 07/30/2026 12:00:29 AM EST). Real estate listings held by brokerage firms other than Realty 100 may be marked with the Internet Data Exchange logo and detailed information about those properties will include the name of the listing broker(s) when required by the MLS. All rights reserved.
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