- $18,500,000
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 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.
Address
Open on Google Maps-
Address: Mashta
-
City: Key Biscayne
-
State/county: Miami-Dade
-
Zip/Postal Code: 33149
Details
Updated on August 4, 2026 at 5:58 pm-
Property ID B26058354
-
Price $18,500,000
-
Property Size 2255 Sq Ft
-
Land Area 0.34 Sq Ft
-
Bedrooms 4
-
Bathrooms 4
-
Year Built 1958
-
Type Single Family Residence
-
Property Status Residential
Additional details
-
BathroomsFull 4
-
BathroomsHalf 1
-
BuildingAreaSource Public Records
-
BuildingAreaTotal 3720
-
CLIP 1043014073
-
CarportSpaces 2
-
ConstructionMaterials Brick, Concrete
-
ContractStatusChangeDate 2026-07-30
-
Cooling Central Air
-
CoveredSpaces 2
-
CumulativeDaysOnMarket 6
-
CurrentPrice 18500000
-
DaysOnMarket 6
-
DaysOnMarketReplication 6
-
DaysOnMarketReplicationDate 2026-08-04
-
DaysOnMarketReplicationIncreasingYN 1
-
DirectionFaces East
-
DocumentsCount 0
-
ElementarySchool Key Biscayne K-8
-
Flooring Concrete, Laminate, Tile
-
FrontageLength 100.00
-
FrontageType Waterfront
-
Furnished Unfurnished
-
GreenEnergyEfficient HVAC, Appliances
-
GreenVerificationYN 1
-
Heating Central, Electric
-
HighSchool Coral Gables
-
InternetAddressDisplayYN 1
-
InternetAutomatedValuationDisplayYN 1
-
InternetConsumerCommentYN 1
-
InternetEntireListingDisplayYN 1
-
LaundryFeatures Inside, Laundry Room, Laundry Tub, Sink
-
Levels One
-
ListAOR BeachesMLS
-
ListAgentAOR BeachesMLS
-
ListAgentDirectPhone 305-909-5940
-
ListAgentEmail javier.quiroz@cbrealty.com
-
ListAgentFirstName Javier
-
ListAgentFullName Javier Gustavo Quiroz
-
ListAgentKey 26761054
-
ListAgentKeyNumeric 26761054
-
ListAgentLastName Quiroz
-
ListAgentMiddleName Gustavo
-
ListAgentMlsId 276804194
-
ListAgentNationalAssociationId 276804194
-
ListAgentOfficePhone 561-395-2233
-
ListAgentPreferredPhone 305-909-5940
-
ListAgentStateLicense 3609636
-
ListOfficeAOR BeachesMLS
-
ListOfficeEmail joseph.santini@floridamoves.com
-
ListOfficeKey 5897736
-
ListOfficeKeyNumeric 5897736
-
ListOfficeMlsId 606111
-
ListOfficeName Coldwell Banker
-
ListOfficePhone 561-395-2233
-
ListingAgreement Exclusive Right To Sell
-
ListingContractDate 2026-07-29
-
ListingKey 1178589130
-
ListingKeyNumeric 1178589130
-
ListingService Full Service
-
ListingTerms Cash, Conventional
-
LivingAreaSource Public Records
-
LotFeatures 1/4 to 1/2 Acre Lot, Sprinklers Automatic, Sprinkler System
-
LotSizeArea 15000
-
MLSAreaMajor 2520
-
MainLevelBathrooms 4
-
MainLevelBedrooms 4
-
MajorChangeTimestamp July 30, 2026 at 03:04pm
-
MajorChangeType New Listing
-
MapCoordinateSource Imported
-
MiddleOrJuniorSchool Ponce De Leon
-
MlsStatus Active
-
MobileDimUnits Feet
-
ModificationTimestamp August 4, 2026 at 02:59pm
-
OccupantType Vacant
-
OnMarketDate 2026-07-30
-
OnMarketTimestamp 2026-07-30T00:00:00.000-00:00
-
OpenHouseModificationTimestamp 2026-08-04T10:58:18.827-00:00
-
OpenParkingSpaces 6
-
OriginalEntryTimestamp July 30, 2026 at 02:40pm
-
OriginalListPrice 18500000
-
OriginatingSystemID M00000170
-
OriginatingSystemKey 630791232
-
OriginatingSystemListAgentMemberKey 1167807
-
OriginatingSystemListOfficeKey 1153566
-
OriginatingSystemModificationTimestamp 2026-08-04T10:58:18.827-00:00
-
OriginatingSystemName BEACH
-
OriginatingSystemSubName BEACH_BEACH
-
OtherParking CarportSpaces:2.00
-
ParcelNumber 2452050080070
-
ParkingFeatures Attached Carport, Circular Driveway, Carport, Driveway
-
ParkingTotal 8
-
PatioAndPorchFeatures Covered, Patio, Rooftop
-
Permission IDX
-
PetsAllowed No Pet Restrictions, Yes
-
PhotosChangeTimestamp August 4, 2026 at 02:59pm
-
PhotosCount 13
-
PoolFeatures In Ground, Pool Equipment
-
Possession Close Of Escrow, Negotiable
-
PostalCity Key Biscayne
-
PostalCode 33149
-
PostalCodePlus4 1720
-
PropertyCondition Resale, Updated/Remodeled
-
PropertySubTypeAdditional Single Family Residence
-
PublicSurveyTownship 24
-
Roof Shingle
-
RoomsTotal 4
-
Sewer Public Sewer
-
SourceSystemID TRESTLE
-
SourceSystemKey 1178589130
-
SourceSystemName flexmls
-
SpecialListingConditions Standard
-
StateOrProvince FL
-
StatusChangeTimestamp July 30, 2026 at 02:40pm
-
Stories 1
-
StoriesTotal 1
-
StreetDirPrefix N
-
StreetName Mashta
-
StreetNumber 631
-
StreetNumberNumeric 631
-
StreetSuffix Drive
-
StructureType House
-
SubdivisionName MASHTA ISLAND
-
TaxAnnualAmount 112485
-
TaxLegalDescription MASHTA ISLAND PB 60-93 LOT 7 BLK 1 LOT SIZE 100.000 X 150 OR 17980-3315 0198 4
-
TaxYear 2025
-
UniversalPropertyId US-12025-N-2452050080070-R-N
-
Utilities Electricity Connected, Sewer Connected, Water Connected
-
VideosChangeTimestamp 2026-08-04T14:59:32.723-00:00
-
VideosCount 0
-
View Bay, Intercoastal, Pool, Water
-
WaterSource Public
-
WaterfrontFeatures Bayfront, Intracoastal Access, Navigable Water, No Fixed Bridges, Ocean Access, Seawall
-
WindowFeatures Storm Window(s)
-
Zoning 2001
Features
- Cooktop
- Dishwasher
- Dryer
- Dual Sinks
- Electric Cooktop
- Electric Water Heater
- ENERGY STAR Qualified Dishwasher
- ENERGY STAR Qualified Dryer
- ENERGY STAR Qualified Freezer
- ENERGY STAR Qualified Refrigerator
- ENERGY STAR Qualified Washer
- Entrance Foyer
- Free-Standing Freezer
- Garden
- Has a View
- Has Carport
- Has Cooling System
- Has Heating System
- Has Pool
- Has Waterfront
- Living/Dining Room
- Microwave
- Outdoor Living Area
- Oven
- Refrigerator
- Walk-In Closet(s)
- Washer
- Water Heater
- Wine Refrigerator
Overview
- Single Family Residence
- 4
- 4
- 2255 Sq Ft
Mortgage Calculator
-
Down Payment
-
Loan Amount
-
Monthly Mortgage Payment
-
Property Tax
-
Home Insurance
-
PMI
-
Monthly HOA Fees
Schedule a Tour
Contact Information
View ListingsSimilar Listings
2870 NE 24th Place, Fort Lauderdale, FL 33305,Fort Lauderdale,Broward,Residential
- $7,250,000
10725 Passage Way, Parkland, FL 33076,Parkland,Broward,Residential
- $1,985,000
9900 Winding Rdg Lane, Davie, FL 33324,Davie,Broward,Residential
- $6,500,000
- Melody Christle