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GRAND BAY RESIDENCES COND,GRAND BAY · · MLS A11954185
Listed by One Sotheby's International Realty
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.
The propertyAs the MLS records it
$107,554 per month
30-year fixed, 7.24% interest
The calculator opens on the national average rate for a 30-year fixed-rate loan: 7.24% for the week of October 29, 2026. Source: Freddie Mac, Primary Mortgage Market Survey ↗
For illustration only: an estimate, not a loan offer or a quote. The tax is the last annual bill the MLS records for this property; in Florida a property is reassessed when it is sold, so a buyer's tax will differ. Insurance is not estimated: it is included only when you enter your own quote. The rate is a national weekly average, not the rate a lender will offer you: change it to the one you are quoted.
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Showings of 445 Grand Bay Drive PH-1A, Key Biscayne, FL 33149 are by appointment. Send the request here, call or write on WhatsApp: Julian Acosta, real estate advisor with Compass, answers within one business day to confirm a day and a time.
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| Year | Median price per SF | Closed sales |
|---|---|---|
| 2020 | $888 | 36 |
| 2021 | $953 | 82 |
| 2022 | $1,179 | 66 |
| 2023 | $1,150 | 57 |
| 2024 | $1,248 |
Homes of the same kind on the market nearby, the nearest in price first.
AS OF OCT 30, 2026 · MLS
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1 / 52The information on this page is supplied by the Southeast Florida Multiple Listing Service of the MIAMI Association of REALTORS®. It is deemed reliable but is not guaranteed accurate by the MLS, and it may have changed since the date above. It is provided for your personal, non-commercial use and may not be used for any purpose other than to identify properties you may be interested in purchasing. This listing is held by One Sotheby's International Realty. Julian Acosta is a real estate advisor with Compass.
A listing shown here may be held by a brokerage other than Compass. To report an error in this listing's information, write to julian.acosta@compass.com.




















































52 PHOTOGRAPHS
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| 2025 | $1,196 | 39 |
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| 2026 to date | $1,196 | 43 |
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These figures are the market's closed sales as the MLS records them: this building's for a unit, a gated community's for a home inside one, and otherwise the sales of this kind of property in the home's market — for a home at $2,000,000 or more, only that market's sales from that price up. Which of these it is, is said above the figures. No snapshot is drawn from fewer than 5 sales of the last twelve months, and a median price per SF is stated only from 3 sales that state a living area. They are not sales by Julian Acosta, they are not an appraisal, and they say nothing of this home's price.
These are the public schools whose attendance zone holds this listing's location, as Miami-Dade County publishes the zones. A zone is not a guarantee of enrollment, the district can change it, and a listing's point on the map can sit a few meters from its lot: confirm the school with Miami-Dade County Public Schools before you rely on it. Distances are straight lines. The page states no rating of any school.
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