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$18,900,000114 days on marketActive

445 Grand Bay Drive PH1A, Key Biscayne, FL 33149

Key Biscayne, FL 33149
5
Beds
5.5
Baths
8,435
Sq Ft
$2,241
$/Sq Ft
1997
Year Built

Listing Snapshot

List Price$18,900,000
Price / Sq Ft$2,241
Beds5
Baths5.5
Living Area8,435 sqft
Year Built1997
Property Tax$54,141/yr
HOA / Condo Fee$9,923 / monthly
MLS #1153018484
StatusActive
Days on Market114

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.

General Features

Property Type
Residential
Sub-type
Condominium
Stories
14
Direction Faces
East
Parking
Covered,Garage,GarageDoorOpener,Valet
Security
ElevatorSecured,FireAlarm,SecuredGarageParking,SmokeDetectors,SecurityGuard
Utilities
CableAvailable
Subdivision
GRAND BAY RESIDENCES COND

Interior Features

Appliances
Dryer,Dishwasher,ElectricRange,ElectricWaterHeater,Disposal,IceMaker,Microwave,Oven,Refrigerator,Washer
Flooring
Carpet,Marble,Wood
Heating
Electric
Cooling
Electric
Interior Features
WetBar,Bidet,BuiltInFeatures,BreakfastArea,Bathtub,ClosetCabinetry,DiningArea,SeparateFormalDiningRoom,DualSinks,EntranceFoyer,EatInKitchen,HighCeilings,MainLevelPrimary,Pantry,SoakingTub,SeparateShower,WalkInClosets
Window Features
Blinds,Drapes,Rods
Furnished
Unfurnished

Exterior Features

Construction
Block
Exterior Features
Balcony,OutdoorLivingArea
Patio / Porch
Open,Balcony
Pool Features
Association
View
Bay,Ocean
Waterfront
Yes
Waterfront Features
BeachAccess,DeededAccess,OceanAccess,OceanFront

Community Features

Association Amenities
BikeStorage,Clubhouse,FitnessCenter,Management,Pool
Association Dues
$9,923 / monthly
MLS Area
2520

Schools

ElementaryKey Biscayne K-8
MiddlePonce De Leon
HighCoral Gables

Map

Listed by Brigitte Nachtigall · One Sotheby's International Realty
MLS# 1153018484 · BEACH
Information deemed reliable but not guaranteed. © 2026 BEACH.

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Estimate Your Payment

$

20% down · Loan: $15,120,000

%
Est. Monthly$117,580
Principal & Interest$103,145
Property Tax$4,512
HOA$9,923

Estimate only. Does not include insurance or PMI. Rate is illustrative — contact us for current rates.

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