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Grand Bay Residences Cond, Apt PH-1A For Sale

445 Grand Bay Drive Apt PH-1A, Key Biscayne, FL 33149

Price: $18,900,000 | 11,260 s.f. | 5 Beds | 5½ Baths

 

Property Information Grand Bay Residences Cond #PH-1A

Listing Price: $18,900,000
Price per Square Foot: $2,240.66/s.f.
Beds: 5
Baths:
Interior Space: 8,435 s.f. (783.6 m²)
Total Size: 11,260 s.f. (1,046.1 m²)
Monthly Maintenance Fee: $0
Taxes (2025): $54,141
Reference: A11954185
 

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Description of Grand Bay Residences Cond #PH-1A

Description of Unit

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.

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The MLS data provided for the property above (MLS#A11954185) is provided courtesy of One Sotheby's International Realty. Source: Southeast Florida MLS. Data updated 2/16/2026. Information is deemed reliable but not guaranteed. Copyright © 2026. The listing data on this page comes in part from the Internet Data Exchange (IDX), a collaboration between the following REALTOR(R) associations in the South Florida Multiple Listing Service (MLS): Miami Realtor Association, Realtor Association of Greater Ft. Lauderdale and the South Broward Board of Realtors. All rights reserved. The information being provided is 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. Data is believed to be accurate, but is not warranted. Use of search facilities of data on the site, other than a consumer looking to purchase real estate, is prohibited. Federal law prohibits discrimination on the basis of race, color, religion, sex, handicap, familial status or national origin in the sale, rental or financing of housing.
 

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