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$18,900,000
Key Biscayne, FL 33149
Explore the area: Key Biscayne homes for sale · Miami Dade County real estate
$99,328 /mo
Principal and interest only, based on $3,780,000 down (20%), a 6.875% 30-year fixed rate. Property taxes, homeowners insurance, and the $9,923/mo HOA are not included.
Customize this estimateHigh 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.
About the Community
Grand Bay Residences Cond is an age-restricted 55+ community in Key Biscayne, Miami-Dade County, Florida, governed under the Housing for Older Persons Act (HOPA). Homes are priced from $9,900,000 to $18,900,000. At least one resident per home must be 55 or older. Pure Equity Realty represents buyers and sellers in Grand Bay Residences Cond at 1% listing commission. Free buyer representation.
Frequently Asked Questions
Listing courtesy of One Sotheby's International Realty
Listing information is provided by BeachesMLS, Inc.and is deemed reliable but not guaranteed accurate by the MLS or Pure Equity Realty. Information is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties. © 2026 BeachesMLS, Inc. Last updated June 23, 2026.
$18,900,000
Contact us to schedule a showing or ask a question.
Listed by Brigitte Nachtigall, One Sotheby's International Realty
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