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

$18,900,000

445 Grand Bay Drive #PH-1A

Key Biscayne, FL 33149

Estimated payment $113,400/month

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5Beds
6Baths
8,435Sq Ft
$2241Price/Sq Ft

Preferred partner

Kinsfolk Realty

Kinsfolk Signature Realty

Powered by Hometrino

(813) 602-0498

Highlights

HOA $9923/mo
Built in 1997

About This Home

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.

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Facts & features

Bedrooms & bathrooms

  • •Bedrooms:5
  • •Bathrooms:6
  • •Full bathrooms:0

Heating

  • •Has Heating:Yes

Interior area

  • •Total structure area:8,435 sqft
  • •Total interior livable area:8,435 sqft

Parking

  • •Parking features:N/A
  • •Garage spaces:0
  • •Has attached garage:No

Lot

  • •Size:N/A

Details

  • •Parcel number:N/A

Type & style

  • •Home type:Condominium
  • •Property subtype:Residential

Materials

  • • N/A

Condition

  • •Year built:1997

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Price history

DateEventPrice
2026-02-14T00:00:00.000ZListed for sale$18,900,000$2241/sqft

Listing Agent

Brigitte Nachtigall

One Sotheby's International Realty

Brokerage Phone: 305-365-2811

Source: Beaches MLS · MLS #A11954185

Data Powered by Home Junction, Inc.

Nearby

Schools

KEY BISCAYNE K-8 CENTER

Elementary · 0.5 mi

UNIVERSITY OF MIAMI COOPERATIVE INSTITUTE FOR MARINE AND ATMOSPHERIC STUDIES (CIMAS)

2.7 mi

Supermarkets

Key Biscayne Green Market

0.4 mi

Winn-Dixie

0.4 mi

NAHUEN Gourmet Market

0.4 mi

Dining

Oceana Key Biscayne Restaurant

0.1 mi

Ocean Club Cabana

0.3 mi

Panna

0.4 mi

Parks

Paradise Park

0.4 mi

Hampton Park

0.6 mi

Harbor Park

0.9 mi

Beaches

Crandon Park Beach

0.2 mi

Crandon Beach

1.1 mi

Hobie Island Beach Park

3.8 mi

Nearby amenity locations include data © OpenStreetMap contributors.