445 Grand Bay Drive PH1A — principal view

Maison Azure — private collection

445 Grand Bay Drive PH1A

$18,900,000

Key Biscayne, FL

5 bd · 6 ba · 8,435 sf

Bedrooms
5
Bathrooms
6
Living area
8,435 sf
Built
1997
Price / sq ft
$2,241

The residence

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.

Distinctions

Views

  • Bay
  • Direct Ocean
  • Ocean

Waterfront

  • Deeded Beach Access
  • Ocean Access
  • Ocean Front

Interior

  • Built-in Features
  • Entrance Foyer
  • High Ceilings
  • Pantry
  • Wet Bar
  • Walk-In Closet(s)
  • Closet Cabinetry

Exterior

  • Balcony

Club & amenities

  • Fitness Center
  • Management
  • Pool
  • Bike Storage
  • Community Room

Parking

  • Covered
  • Garage Door Opener
  • Valet

The building

Grand Bay Residences Cond

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The setting

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Presented by

One Sotheby's International Realty · Brigitte Nachtigall

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Listing courtesy of One Sotheby's International Realty · Brigitte Nachtigall

Listing information is provided by BeachesMLS via the Spark Platform. All information is deemed reliable but not guaranteed and should be independently verified. Properties may or may not be listed by the office/agent presenting the information.

Last updated 2026-07-07