445 Grand Bay Drive # 1A, Key Biscayne FL 33149

Penthouse For Sale

$18,900,000

BTC: 295.31250000

ETH: 10,824.74226804

109 days

Waterfront

For Sale

Penthouse

5 bds •

5 ba •

8,435 sqft

Overview

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.

Location

Florida • Key Biscayne • 33149 • Penthouse • For Sale • Waterfront

Details

Type:

Residential

Parking:

2 Or More Spaces / Covered / Valet / No Rv/Boats / No Trucks/Trailers

Year Built:

1997

Lot:

No Data

Heating:

Electric

Price/sqft:

$2,241

Cooling:

Electric

HOA:

No Data

Type:

Residential

Parking:

2 Or More Spaces / Covered / Valet / No Rv/Boats / No Trucks/Trailers

Year Built:

1997

Lot:

No Data

Heating:

Electric

Price/sqft:

$2,241

Cooling:

Electric

HOA:

No Data

Private inquiry

Talk to the advisor on this listing.

Floor plans, HOA docs, off-market comparables, scheduling a private showing — one message, direct to the local specialist.

Valuation

Recent sales nearby

30 public-records sales within 0.5 mi

Median actual sale: $1.3M

Not enough MLS comparables for a model estimate on this property. Public-records data shown instead.

Highlights

Annual tax

$54,141

2025

View

Bay, Ocean View

Waterfront

Ocean Access, Ocean Front

Pets

Restrictions Or Possible Restrictions

All facts and features

Flooring

• Carpet

• Marble

• Wood

Heating

• Electric

Cooling

• Electric

Appliances

• Dishwasher

• Disposal

• Dryer

• Electric Water Heater

• Ice Maker

• Microwave

• Electric Range

• Refrigerator

• Wall Oven

• Washer

Other interior features

• Built-in Features

• Closet Cabinetry

• Entrance Foyer

• Pantry

• Volume Ceilings

• Walk-In Closet(s)

• Wet Bar

• Den/Library/Office

• Family Room

• Great Room

Bedrooms and bathrooms

• Bedrooms: 5

• Bathrooms: 1

• Full bathrooms: 5
Parking

• 2 Or More Spaces

• Covered

• Valet

• No Rv/Boats

• No Trucks/Trailers

Property

• Levels: 1

• Exterior Features: Open Balcony

Other Property Information

• Parcel Number: 24-52-05-049-1350
Type and style

• Property Type: Residential

• Property Sub Type: Condominium
Other financial information

• HOA Frequency: Monthly

• Annual tax amount: $54,141
Source details

• MLS ID: A11954185

Other facts

• Construction Materials: CBS Construction

• Patio And Porch Features: Open Balcony

• Window Features: Blinds / Drapes

• Direction Faces: East

• Architectural Style: Corner Unit / High Rise / Penthouse

• Waterfront: Yes

• Living Area: 8435

• Subdivision Name: GRAND BAY RESIDENCES COND,GRAND BAY

Private inquiry

Talk to the advisor on this listing.

Floor plans, HOA docs, off-market comparables, scheduling a private showing — one message, direct to the local specialist.

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Market around this address

Live counts in the same area.

The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: One Sotheby's International Realty

445 Grand Bay Drive # 1A, Key Biscayne FL 33149

Overview

Location

Details

Valuation

Highlights

Interior details

Property details

Construction details

HOA and Financial Details

Other

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