$5,799,000
Active
4d
$5,799,000
669 Mashta
Key Biscayne, FL 33149
4 bd3.5 ba3,382 sqft
Mashta Island
$6,900,00074 days on marketActive
430 Grand Bay Drive 801, Key Biscayne, FL 33149
Key Biscayne, FL 33149
2
Beds
3.5
Baths
3,950
Sq Ft
$1,747
$/Sq Ft
1999
Year Built
2 car
Garage
Listing Snapshot
| List Price | $6,900,000 |
| Price / Sq Ft | $1,747 |
| Beds | 2 |
| Baths | 3.5 |
| Living Area | 3,950 sqft |
| Year Built | 1999 |
| Property Tax | $131,192/yr |
| HOA / Condo Fee | $4,398 / monthly |
| MLS # | 1155612856 |
| Status | Active |
| Days on Market | 74 |
About This Home
Commanding breathtaking Atlantic vistas from its privileged eighth-floor setting at Grand Bay Tower, this exceptional residence is a rare offering on the island of Key Biscayne. Originally conceived as a three-bedroom, five-and-a-half-bath home, it has been masterfully reimagined into a grand two-bedroom, three-and-a-half-bath layout, enhancing scale and flow for refined entertaining and effortless daily living. With approximately 3,950sf, the expansive living and dining areas, a welcoming family room, and a bright kitchen with breakfast area are complemented by three terraces totaling about 595sf that are seamlessly integrated throughout the residence. Custom woodwork by renowned designer Juan Montoya enriches the interiors, while the serene primary suite offers a secluded sitting room, bespoke closets and a spa-inspired bath, completing this exceptional oceanfront retreat. One storage unit is included. Separate guest quarters and an additional storage unit are available for purchase separately.
General Features
- Property Type
- Residential
- Sub-type
- Condominium
- Stories
- 13
- Direction Faces
- East
- Garage Spaces
- 2
- Parking
- Valet
- Security
- SecuritySystem,FireSprinklerSystem,KeyCardEntry,LobbySecured
- Subdivision
- GRAND BAY TOWER CONDO
Interior Features
- Appliances
- Dryer,Dishwasher,ElectricRange,ElectricWaterHeater,Disposal,Microwave,Refrigerator
- Heating
- Electric
- Cooling
- CentralAir
- Interior Features
- BreakfastArea,Bathtub,ClosetCabinetry,DiningArea,SeparateFormalDiningRoom,DualSinks,EntranceFoyer,KitchenIsland,SittingAreaInPrimary,Storage,SoakingTub,SeparateShower,WalkInClosets
- Laundry
- LaundryTub
Exterior Features
- Construction
- Block
- Exterior Features
- Balcony,OutdoorLivingArea
- Patio / Porch
- Open,Balcony
- Pool Features
- Association,Heated
- View
- Ocean
- Waterfront
- Yes
- Waterfront Features
- NoFixedBridges,OceanAccess,OceanFront
Community Features
- Community Features
- HomeOwnersAssociation
- Association Amenities
- BikeStorage,FitnessCenter,MaintenanceGrounds,Pool
- Association Dues
- $4,398 / monthly
- MLS Area
- 2420
Schools
ElementaryKey Biscayne K-8
MiddlePonce De Leon
HighCoral Gables
Map
Virtual Tour
View Virtual TourListed by Adriana Vollmer · Coldwell Banker Realty
MLS# 1155612856 · BEACH
Information deemed reliable but not guaranteed. © 2026 BEACH.
MLS# 1155612856 · BEACH
Information deemed reliable but not guaranteed. © 2026 BEACH.
Interested in this home?
Schedule a showing or ask a question — buyer representation is free.
Estimate Your Payment
$
20% down · Loan: $5,520,000
%
Est. Monthly$52,987
Principal & Interest$37,656
Property Tax$10,933
HOA$4,398
Estimate only. Does not include insurance or PMI. Rate is illustrative — contact us for current rates.
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