Ad #7274376
MLS #A11954185
High above the turquoise waters of Key Biscayne rises a
445 Grand Bay Dr Ph-1A, Key Biscayne, FL 33149
$18,900,000
5Beds
6Baths
8,435Sqft
--Acres
About this property
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.
Property Features
5 Beds
6 Baths
8,435 Sqft
Built in 1997
0.000 Acres
1 Story
Crandon Golf At Key Biscayne
On Golf Course
Valet, Covered, Open
Siding: Block
Electric (Heating)
$54,141 / yr property tax
Miami-Dade County
GRAND BAY RESIDENCES COND Community
Additional Photos
Contact Information
Brigitte Nachtigall
One Sothebys International Realty
305-710-9664
Location
Listing Agent: Brigitte Nachtigall (License #: 0542022) 305-710-9664
Broker: One Sothebys International Realty 305-666-0562 Listing Site
Copyright © 2026 Miami REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Broker: One Sothebys International Realty 305-666-0562 Listing Site
Copyright © 2026 Miami REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
GolfHomes.com
Printed Aug 11, 2026
Photo Gallery
$18,900,000
5
Beds
6
Baths
8,435
Sqft
445 Grand Bay Dr Ph-1A, Key Biscayne, FL 33149
By contacting this agent you agree to these Terms and Conditions.
MLS# A11954185
High above the turquoise waters of Key Biscayne rises a
$18,900,000
445 Grand Bay Dr Ph-1A, Key Biscayne, FL 33149
5
Beds
6
Baths
8,435
Sqft
--
Acres
$18,900,000
445 Grand Bay Dr Ph-1A, Key Biscayne, FL 33149
5 Beds
6 Baths
8,435 Sqft
-- Acres
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.
178 days
on GolfHomes.com
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Property Details
HOME DETAILS
5 Beds
6 Baths
8,435 Sqft
Built in 1997
0.000 Acres
1 Story
GOLF COURSE & VIEW
Crandon Golf At Key Biscayne
On Golf Course
EXTERIOR
Valet, Covered, Open
Siding: Block
INTERIOR
Electric (Heating)
FINANCIAL & COMMUNITY
$54,141 / yr property tax
Miami-Dade County
GRAND BAY RESIDENCES COND Community
See More Details
Location
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Ad Statistics
Ad Number
7274376
Viewed
52 times
Listing Status
Active
Added
Feb 14, 2026
Last Refreshed
Jul 03, 2026 06:17:28 PM
Listing Information
Data Source
Miami REALTORS®
Source Property ID
A11954185
Listing Agent: Brigitte Nachtigall (License #: 0542022) 305-710-9664
Broker: One Sothebys International Realty 305-666-0562 Listing Site
Copyright © 2026 Miami REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Broker: One Sothebys International Realty 305-666-0562 Listing Site
Copyright © 2026 Miami REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
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