631 N Mashta Dr Key Biscayne, FL 33149
Key Biscayne AreaEstimated payment $111,448/month
Highlights
- Property has ocean access
- Private Dock
- Intracoastal View
- Key Biscayne K-8 Center Rated A-
- Home fronts navigable water
- Pool
About This Home
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 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.
Home Details
Home Type
- Single Family
Est. Annual Taxes
- $112,485
Year Built
- Built in 1958 | Remodeled
Lot Details
- 15,000 Sq Ft Lot
- 100 Ft Wide Lot
- Home fronts navigable water
- Property fronts an intracoastal waterway
- East Facing Home
- Property is zoned 2001
Property Views
- Intracoastal
- Bay
Home Design
- Substantially Remodeled
- Shingle Roof
- Brick Front
Interior Spaces
- 2,255 Sq Ft Home
- Property has 1 Level
- Entrance Foyer
- Combination Dining and Living Room
- Complete Impact Glass
Kitchen
- Built-In Self-Cleaning Oven
- Microwave
- Free-Standing Freezer
- Dishwasher
Flooring
- Concrete
- Tile
Bedrooms and Bathrooms
- 4 Bedrooms
- Walk-In Closet
- Dual Sinks
Laundry
- Dryer
- Washer
Parking
- 8 Car Attached Garage
- 2 Carport Spaces
- Circular Driveway
- Open Parking
Eco-Friendly Details
- Energy-Efficient Appliances
- Energy-Efficient HVAC
Outdoor Features
- Pool Equipment Stays
- Property has ocean access
- Seawall
- Private Dock
- Patio
Schools
- Keybiscayne Elementary School
- Ponce De Leon Middle School
- Coral Gables High School
Utilities
- Central Heating and Cooling System
- Electric Water Heater
Listing and Financial Details
- Assessor Parcel Number 24-52-05-008-0070
Community Details
Overview
- No Home Owners Association
- Mashta Island Subdivision
Recreation
- Community Boat Dock
- Community Pool
Map
Home Values in the Area
Average Home Value in this Area
Tax History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2025 | $112,485 | $6,855,108 | ||
| 2024 | $102,890 | $6,231,917 | $6,225,000 | $6,917 |
| 2023 | $102,890 | $6,371,245 | $5,670,000 | $701,245 |
| 2022 | $83,488 | $4,582,083 | $0 | $0 |
| 2021 | $69,647 | $4,397,303 | $4,125,000 | $272,303 |
| 2020 | $72,644 | $4,397,371 | $4,125,000 | $272,371 |
| 2019 | $72,826 | $4,397,439 | $4,125,000 | $272,439 |
| 2018 | $70,437 | $4,397,507 | $4,125,000 | $272,507 |
| 2017 | $88,236 | $4,910,766 | $0 | $0 |
| 2016 | $86,441 | $4,464,333 | $0 | $0 |
| 2015 | $82,558 | $4,058,485 | $0 | $0 |
| 2014 | $75,353 | $3,689,532 | $0 | $0 |
Property History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft |
|---|---|---|---|---|
| 07/29/2026 07/29/26 | For Sale | $18,500,000 | -- | $8,204 / Sq Ft |
Purchase History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Type | Sale Price | Title Company |
|---|---|---|---|
| Warranty Deed | $8,500,000 | None Listed On Document | |
| Interfamily Deed Transfer | -- | Attorney | |
| Interfamily Deed Transfer | -- | Attorney | |
| Deed | $100 | -- | |
| Personal Reps Deed | $100 | -- |
Mortgage History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Loan Amount | Loan Type |
|---|---|---|---|
| Open | $5,100,000 | New Conventional |
Source: MIAMI REALTORS® MLS
MLS Number: B26058354
APN: 24-5205-008-0070
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Ask me questions while you tour the home.