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.
Current real estate data for Condo in Key Biscayne as of Oct 31, 2026
113
Condo Listed
113
Avg DOM
1,156
Avg $ / SqFt
$2,543,685
Avg List Price
Listing Provided Courtesy of One Sotheby’s International Realty at 305-365-2811
Property Details
Price:
$18,900,000
MLS #:
A11954185
Status:
Active
Beds:
5
Baths:
5.5
Type:
Condo
Subtype:
Condominium
Subdivision:
GRAND BAY RESIDENCES COND
Neighborhood:
2520
Listed Date:
Feb 14, 2026
Finished Sq Ft:
8,435
Total Sq Ft:
11,260
Year Built:
1997
Schools
Elementary School:
Key Biscayne K-8
Middle School:
Ponce De Leon
High School:
Coral Gables
Interior
Appliances
Electric Water Heater, Dishwasher, Disposal, Dryer, Electric Range, Ice Maker, Microwave, Oven, Refrigerator, Washer
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Electric
Flooring
Carpet, Marble, Wood
Heating
Electric
Interior Features
Built-in Features, Closet Cabinetry, Entrance Foyer, High Ceilings, Pantry, Walk-In Closet(s), Wet Bar
Exterior
Association Amenities
Pool, Bike Storage, Community Room, Fitness Center, Management
Community
55+
Construction Materials
CBS
Direction Faces
East
Exterior Features
Balcony
Open Parking Spaces
2
Parking Features
Covered, Garage Door Opener, Valet
Security Features
Elevator Secure, Fire Alarm, Secured Garage/Parking, Security Guard, Smoke Detector(s)
Senior Community YN
1
Stories
1
View
Ocean, Direct Ocean, Bay
Waterfront Features
Ocean Access, Deeded Beach Access, Ocean
Window Features
Blinds, Drapes, Rods
Financial
HOA Fee
$9,923
HOA Fee Frequency
Monthly
HOA Includes
Cable TV, Common Areas, Maintenance Grounds, Security, Sewer, Water
Tax Year
2025
Taxes
$54,141
Map
Contact Us
Mortgage Calculator
Community
- Address445 Grand Bay Drive PH-1A Key Biscayne FL
- SubdivisionGRAND BAY RESIDENCES COND
- CityKey Biscayne
- CountyMiami-Dade
- Zip Code33149
Property Summary
- Located in the GRAND BAY RESIDENCES COND subdivision, 445 Grand Bay Drive PH-1A Key Biscayne FL is a Condo for sale in Key Biscayne, FL, 33149. It is listed for $18,900,000 and features 5 beds, 6 baths, and has approximately 8,435 square feet of living space, and was originally constructed in 1997. The current price per square foot is $2,241. The average price per square foot for Condo listings in Key Biscayne is $1,156. The average listing price for Condo in Key Biscayne is $2,543,685. To schedule a showing of MLS#a11954185 at 445 Grand Bay Drive PH-1A in Key Biscayne, FL, contact your Trust House Realty agent at 9543362003.
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