MIAMI LUXHomes

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

$18,900,0005 Beds6 Baths8,435 Sq. Ft.$2,241 / sq. ft.

Key Biscayne, FL 33149 · Grand Bay Residences

Status
Active
Type
Condominium
Year Built
1997
Days on Market
180
MLS #
A11954185
County
Miami-Dade County

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

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.

How This Listing Compares in Key Biscayne

Per square foot, it is asking 132% above the Key Biscayne median for sales closed over the last twelve months — typical of premium views, newer construction or a top-tier building.

This homeKey Biscayne median (12 mo)
Price per sq. ft.$2,241$967
5-bedroom price$18,900,000$5,690,000
Days on market18061

Medians from closed MLS sales in Key Biscayne; a starting point, not an appraisal.

Home Features at 445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

Bathrooms Full
5
Bathrooms Half
1
Interior Features
Built-in Features, Closet Cabinetry, Entrance Foyer, Pantry, Volume Ceilings, Walk-In Closet(s), Wet Bar, Den/Library/Office, Family Room, Great Room
Appliances
Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Microwave, Electric Range, Refrigerator, Wall Oven, Washer
Flooring
Carpet, Marble, Wood
Heating
Electric
Cooling
Electric
Furnished
Unfurnished
Architectural Style
Corner Unit, High Rise, Penthouse
Garage Spaces
0
Parking Features
2 Or More Spaces, Covered, Valet, No Rv/Boats, No Trucks/Trailers
Pool Private
No
Year Built Details
Resale
Direction Faces
East

The Building at 445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

Building Name
GRAND BAY
Building Area Total
11260
Building Area Units
Square Feet
Stories Total
14
Entry Level
14
Association
Yes
Association Fee
0
Association Fee Frequency
Monthly
Association Amenities
Bike Storage, Community Room, Exercise Room, Pool
Pets Allowed
Restrictions Or Possible Restrictions
Security Features
Fire Alarm, Smoke Detector, Elevator Secure, Secured Garage/Parking, Guard At Site

Lot, Views & Construction at 445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

Lot Size Square Feet
0
Waterfront
Yes
Waterfront Features
Ocean Access, Ocean Front
View
Bay, Ocean View, Direct Ocean
Construction Materials
CBS Construction
Exterior Features
Open Balcony
New Construction
No

Taxes & Public Record for 445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

Parcel Number
24-52-05-049-1350
Tax Annual Amount
$54,141
Tax Year
2,025
Tax Legal Description
GRAND BAY RESIDENCES CONDO UNIT PH-1A UNDIV 1.7892% INT IN COMMON ELEMENTS OFF REC 17374-0773 OR 17905-3465 1297 1
County Or Parish
Miami-Dade County

Assigned Schools for 445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

Elementary School
Keybiscayne

School assignments are provided by the listing and should be independently verified.

Map & Neighborhood

445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149 · More homes in Key Biscayne

Courtesy of One Sotheby's International Realty

Comparable Listings in Key Biscayne

445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149 at a Glance

Offered for sale in Key Biscayne 33149, 445 Grand Bay Drive # PH-1A is a condo with 5 bedrooms, 6 bathrooms, about 8,435 square feet of living space, dating to 1997. The asking price is $18,900,000, on the market since February 14, 2026, with One Sotheby's International Realty as the listing brokerage. Students here are assigned to Keybiscayne. Ask Matthew Gromadzki for a private showing, the full disclosure package, or comparable sales before you make an offer.