1 of 2For Sale at Grand Bay ResidencesBack to list
PH 1A
1 / 52
Grand Bay Residences PH 1A For Sale
$18,900,000
445 Grand Bay Drive · Key Biscayne · Key Biscayne
Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 1 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 2 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 3 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 4 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 5 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 6 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 7 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 8 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 9 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 10 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 11 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 12 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 13 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 14 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 15 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 16 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 17 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 18 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 19 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 20 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 21 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 22 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 23 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 24 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 25 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 26 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 27 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 28 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 29 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 30 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 31 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 32 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 33 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 34 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 35 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 36 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 37 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 38 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 39 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 40 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 41 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 42 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 43 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 44 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 45 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 46 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 47 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 48 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 49 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 50 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 51 of 52Grand Bay Residences PH 1A, 445 Grand Bay Drive, Key Biscayne FL 33149, photo 52 of 52
1 of 2 For Sale at Grand Bay Residences · back to list
$18,900,000Asking Price
$2,241Per SqFt
5/5½Beds/BathsBd/Ba
8,435SqFt · 783.6 m²
Grand Bay Residences · MLS A11954185 · 215 days on Zilbert · Listed Feb 14, 2026 · 445 Grand Bay Drive, Key Biscayne FL 33149Current layoutPhotos first

Property Details

Asking Price$18,900,000
Price per SqFt$2,241
Maintenance fee$9,923 Monthly
Property Taxes$54,141 2025
Interior Space8,435 SqFt
Beds/Baths5/5½
Year Built1997
MLS #A11954185

Estimated Costs

An estimate of condo or HOA fees and property taxes

Monthly carry, before financing
$9,923maintenance · $9,923 per month
$4,512taxes · $54,141/yr ÷ 12
$14,435 / monthassociation + taxes, before mortgage and insurance

Fees and taxes based on MLS provided figures, and may not be accurate

From the listing

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.

Listed by One Sotheby's International Realty

Sales History for This Unit · Grand Bay Residences PH 1A

Sale Sold Price Asking Price Beds/Baths SqFt Closed Date

What Other Units Have Been Selling For at Grand Bay Residences

0 other units sold in the last 12 months · This unit (PH-1A) is asking $2,241/SqFt

Unit Sold Price % of Ask Beds/Baths SqFt $/SqFt Closed Date

For a full analysis of past sales in this development, contact Mark Zilbert.

Mark Zilbert
Mark Zilbert
Licensed Real Estate Broker · I track every sale at Grand Bay Residences. Ask me about this residence, the line, or the building.
+1 (786) 280-0201

Listed by One Sotheby's International Realty. Mark Zilbert of ONE Sotheby's International Realty is a cooperating (transaction) broker and helps buyers find properties in Key Biscayne and throughout South Florida.

Location

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The curated data and calculated data for this property and its surrounding condo units and homes is based solely on data we have extracted from the MLS. There may be unpublished, private, quit claim and other property offerings and transfers that do not appear here, which may affect how a buyer or seller perceives property values. Always conduct proper due diligence when considering buying or selling property.

More at Grand Bay Residences

100 units · 2 for sale · 2 sold in the last 12 months · building avg $969/SqFt sold, against this unit's $2,241 ask