$18,900,000
 $101,459 est/mo Sourced by Back At You

445 Grand Bay Drive Ph-1a,Key Biscayne, FL 33149

Key Biscayne, FL 33149

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Description

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.

Details

MLS #A11954185
Listing TypeFor Sale
StyleCondominium
Building Name445
HOA Dues$9,923
Sub-TypeResale
StatusActive
Year1997
Days On Site201
Listing Provided ByOne Sotheby's International Realty | Brigitte Nachtigall

Features

Bed(s)5
Bath(s) 6 Total
SQ Feet8,435
PoolYes
Story(s)1
Water FrontYes
Property ViewYes

Parking

Garage Yes / NoNo
Parking FeaturesCovered, Garage, Garage Door Opener, Valet

Taxes

Tax Annual Amount54141

Area Information

StateFL
CountyMiami Dade
CityKey Biscayne
Zip Code33149
Area2520
Community NameGRAND BAY RESIDENCES COND
Listing VS Median (in GRAND BAY RESIDENCES COND)
Price:
$18,900,000
low | high
Med:
$3,185,000
100% of Average
sqft:
8,435
low | high
Med:
2,620
100% of Average
$ / sqft:
$2,241
low | high
Med:
$1,269
93.361875459577% of Average
On site:
201
low | high
Med:
169
100% of Average
Sourced by Back At You

Market Activity 33149

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Learn More About This Property

StateFL
CountyMiami Dade
CityKey Biscayne
Zip Code33149
Area2520
Community NameGRAND BAY RESIDENCES COND
Listing VS Median (in GRAND BAY RESIDENCES COND)
Price:
$18,900,000
low | high
Med:
$3,185,000
100% of Average
sqft:
8,435
low | high
Med:
2,620
100% of Average
$ / sqft:
$2,241
low | high
Med:
$1,269
93.361875459577% of Average
On site:
201
low | high
Med:
169
100% of Average
Sourced by Back At You
Listing Updated: August 25, 2026 at 3:17:25 AM PDT