
445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149
Key Biscayne, FL 33149 · Grand Bay Residences
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 home | Key Biscayne median (12 mo) | |
|---|---|---|
| Price per sq. ft. | $2,241 | $967 |
| 5-bedroom price | $18,900,000 | $5,690,000 |
| Days on market | 180 | 61 |
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
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.
