$18,900,000

445 Grand Bay Drive #1A

5 bd · 6 ba · 8,435 sq ft

180 days on marketCondominiumWaterfront

445 Grand Bay Drive #1A, photograph 1 of 40

445 Grand Bay Drive #1A, photograph 2 of 40

445 Grand Bay Drive #1A, photograph 3 of 40

445 Grand Bay Drive #1A, photograph 4 of 40

445 Grand Bay Drive #1A, photograph 5 of 40

445 Grand Bay Drive #1A, photograph 6 of 40

445 Grand Bay Drive #1A, photograph 7 of 40

445 Grand Bay Drive #1A, photograph 8 of 40

445 Grand Bay Drive #1A, photograph 9 of 40

445 Grand Bay Drive #1A, photograph 10 of 40

445 Grand Bay Drive #1A, photograph 11 of 40

445 Grand Bay Drive #1A, photograph 12 of 40

445 Grand Bay Drive #1A, photograph 13 of 40

445 Grand Bay Drive #1A, photograph 14 of 40

445 Grand Bay Drive #1A, photograph 15 of 40

445 Grand Bay Drive #1A, photograph 16 of 40

445 Grand Bay Drive #1A, photograph 17 of 40

445 Grand Bay Drive #1A, photograph 18 of 40

445 Grand Bay Drive #1A, photograph 19 of 40

445 Grand Bay Drive #1A, photograph 20 of 40

445 Grand Bay Drive #1A, photograph 21 of 40

445 Grand Bay Drive #1A, photograph 22 of 40

445 Grand Bay Drive #1A, photograph 23 of 40

445 Grand Bay Drive #1A, photograph 24 of 40

445 Grand Bay Drive #1A, photograph 25 of 40

445 Grand Bay Drive #1A, photograph 26 of 40

445 Grand Bay Drive #1A, photograph 27 of 40

445 Grand Bay Drive #1A, photograph 28 of 40

445 Grand Bay Drive #1A, photograph 29 of 40

445 Grand Bay Drive #1A, photograph 30 of 40

445 Grand Bay Drive #1A, photograph 31 of 40

445 Grand Bay Drive #1A, photograph 32 of 40

445 Grand Bay Drive #1A, photograph 33 of 40

445 Grand Bay Drive #1A, photograph 34 of 40

445 Grand Bay Drive #1A, photograph 35 of 40

445 Grand Bay Drive #1A, photograph 36 of 40

445 Grand Bay Drive #1A, photograph 37 of 40

445 Grand Bay Drive #1A, photograph 38 of 40

445 Grand Bay Drive #1A, photograph 39 of 40

445 Grand Bay Drive #1A, photograph 40 of 40

Listing courtesy of One Sotheby's International Realty. 305-365-2811

From the MLS

Bedrooms: 5
Bathrooms: 6
Living area: 8,435 sq ft
Asking per square foot: $2,241
Year built: 1997
Association fee: $0 monthly
ZIP code: 33149
MLS number: A11954185

What the listing says

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.

Description supplied by One Sotheby's International Realty.

Before you offer on this one

The asking price is the easy part. What decides a Miami condo purchase sits in the association’s budget, its reserve study, the last twelve months of board minutes and the milestone inspection — and in whether the declaration permits what you intend to do with it.

Stefania represents buyers. She does not hold this listing and has no stake in this one selling over any other, which is the position you want the person reading those documents to be in.

Copyright Southeast Florida Multiple Listing Service © 2026. Accuracy of listing information is not guaranteed. Listing information is provided for personal consumer, non-commercial use, solely to identify potential properties for potential purchase. All other use is strictly prohibited, is a violation of the terms of use, and may violate federal and state law.

Work with Stefania

Or tell her what you are actually looking for

One listing is a data point. If you say what the place is for, she will come back with the buildings that fit and the ones to avoid.

What the listing says

Before you offer on this one

Or tell her what you are actually looking for

Got it — that reached Stefania directly.