$18,900,000
5 bd · 6 ba · 8,435 sq ft · Condominium
445 Grand Bay Drive # 1A, Key Biscayne FL 33149
For Sale · Active listing
Est. payment $95,569/mo · Mortgage calculator
Listed by One Sotheby's International Realty / Brigitte Nachtigall
Contact: 305-710-9664 (listing contact).
Shown through Slice Realty. Requests from this page reach Slice Realty / Propiedad Futura, not the listing agent.
About this home
High above the turquoise waters of Key Biscayne rises a penthouse that simply cannot be replicated. Once featured in Architectural Digest, this legendary corner residence at Grand Bay is a statement of scale, design, and presence. From sunrise over the Atlantic to glittering sunsets across Biscayne Bay and the Miami skyline, the views are cinematic in every direction, offering endless blue water, golden light, and exceptional privacy. Spanning an extraordinary 8,435 square feet under air and 2,825 square feet of terraces, totaling 11,260 square feet as per the developer’s floor plan, the residence is defined by soaring 12-foot ceilings and grand proportions throughout. A dramatic foyer leads to a spectacular Grand Room designed for both intimate living and large-scale entertaining. The formal dining room is separate and elegant, while the completely remodeled kitchen and family room provide comfort and functionality. The fully renovated private library and custom bar enhance the home’s entertaining appeal. The primary suite is serene and expansive. All the bathrooms have just been completely remodeled, offering a fresh spa-inspired experience finished to today’s highest standards. Four (4) additional en-suite bedrooms ensure comfort and privacy. The terraces offer expansive outdoor living in the sky, perfect for sunrise mornings and sunset evenings overlooking the water and skyline. This is not simply a penthouse. It is a landmark residence, rare and impossible to duplicate.
Facts
- MLS #
- A11954185
- Subdivision
- GRAND BAY RESIDENCES COND,GRAND BAY
- Property type
- Residential
- Property subtype
- Condominium
- Sq. ft.
- 8,435
- Price per sq. ft.
- $2,241 / sq ft
- Year built
- 1997
- Days on market
- 180
- County
- Miami-Dade County
- Date listed
- Feb 14, 2026
- Last updated
- Aug 13, 2026
Financial considerations
- Taxes
- $54,141 (2025)
- HOA amenities
- Bike Storage, Community Room, Exercise Room, Pool
Exterior features
- Waterfront
- Yes
- View
- Bay, Ocean View, Direct Ocean
- Construction
- CBS Construction
- Additional features
- Open Balcony
Interior features
- Furnished
- Unfurnished
- Heating
- Electric
- Cooling
- Electric
- Appliances
- Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Microwave, Electric Range, Refrigerator, Wall Oven, Washer
- Window features
- Blinds, Drapes
- Additional features
- Built-in Features, Closet Cabinetry, Entrance Foyer, Pantry, Volume Ceilings, Walk-In Closet(s), Wet Bar, Den/Library/Office, Family Room, Great Room
Additional features
- Pets allowed
- Restrictions Or Possible Restrictions
- Security
- Fire Alarm, Smoke Detector, Elevator Secure, Secured Garage/Parking, Guard At Site
Mortgage calculator
Includes principal and interest, taxes and insurance.
Rate shown is a default estimate. Confirm with your lender.
Local context (our analysis)
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Source: Southeast Florida MLS (SEFMLS). Last updated Aug 13, 2026, 11:43 AM ET
Listing data is deemed reliable but is not guaranteed accurate by the MLS. 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.