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 Details
Price:
$18,900,000
MLS #:
A11954185
Status:
Active
Beds:
5
Baths:
5.5
Type:
Condo
Subtype:
Condominium
Subdivision:
GRAND BAY RESIDENCES COND,GRAND BAY
Neighborhood:
grandbayresidencescond
Listed Date:
Feb 14, 2026
Finished Sq Ft:
8,435
Total Sq Ft:
11,260
Year Built:
1997
See this Listing
Schools
Elementary School:
Keybiscayne
Interior
Appliances
Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Microwave, Electric Range, Refrigerator, Wall Oven, Washer
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Electric
Flooring
Carpet, Marble, Wood
Heating
Electric
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
Levels
1
Exterior
Architectural Style
Corner Unit, High Rise, Penthouse
Association Amenities
Bike Storage, Community Room, Exercise Room, Pool
Community
55+
Construction Materials
CBS Construction
Direction Faces
East
Exterior Features
Open Balcony
Parking Features
2 Or More Spaces, Covered, Valet, No Rv/Boats, No Trucks/Trailers
Patio And Porch Features
Open Balcony
Security Features
Fire Alarm, Smoke Detector, Elevator Secure, Secured Garage/Parking, Guard At Site
Senior Community YN
1
View
Bay, Ocean View, Direct Ocean
Waterfront Features
Ocean Access, Ocean Front
Window Features
Blinds, Drapes
Financial
HOA Fee Frequency
Monthly
Maintenance Fee
$9,923
Tax Year
2025
Taxes
$54,141
Map
Community
- Address445 Grand Bay Drive # 1A Key Biscayne FL
- SubdivisionGRAND BAY RESIDENCES COND,GRAND BAY
- CityKey Biscayne
- CountyMiami-Dade County
- Zip Code33149
Subdivisions in Key Biscayne
- 101 CONDOMINIUM
- 150 SUNRISE DRIVE CONDO
- 155 SUNRISE CONDO
- 544-548 FERNWOOD CONDO
- BAHAMA HOUSE CONDO,Bahama House
- BAHAMA HOUSE SOUTH CONDO
- BAHAMA HOUSE SOUTH CONDO,KEY CASSA
- BAHIA MAR CONDO OF KEY BI
- Beach Haus Key Biscayne,Beach Haus
- BISC KEY ESTATES
- BISCAYNE KEY ESTATES
- BLUE PELICAN CONDO
- CAPE FLA CLUB CONDO CLUST
- CAPE FLA SUB SEC 2
- CAPE FLORIDA CLIB CONDO P
- CAPE FLORIDA CLUB CONDO P
- CAPE FLORIDA SUB SEC 1
- CAPE FLORIDA SUB SEC 3
- CAPE FLORIDA SUB SEC 3,Village Estate
- CASA DEL MAR
- CASA DEL MAR CONDO
- CAY POLYNESIA CONDO
- CLUB TOWER ONE CONDO
- CLUB TOWER THREE CONDO
- CLUB TOWER THREE CONDO,CLUB TOWER THREE CON
- CLUB TOWER TWO CONDO
- commodore club
- COMMODORE CLUB SOUTH COND
- COMMODORE CLUB SOUTH COND,COMMODORE
- COMMODORE CLUB SOUTH COND,COMMODORE CLUB SOUTH
- Commodore Club South Condo
- COMMODORE CLUB WEST CONDO
- COMMODORE CLUB WEST CONDO,COMMODORE CLUB
- CRANDON TOWER CONDO
- G B RESORT CONDO HOTEL
- G B Resort Condo Hotel,Ritz Carlton
- G B VILLAS
- GALEN 250 CONDO
- GALEN DRIVE CONDO APTS
- GALEN DRIVE WEST CONDOMIN
- GRAND BAY RESIDENCES COND
- GRAND BAY RESIDENCES COND,GRAND BAY
- GRAND BAY TOWER CONDO
- GRAND BAY TOWER CONDO,GRAND BAY
- GRAND BAY TOWER CONDO,GRAND BAY TOWER COND
- GRAPETREE TOWNHOUSE CONDO
- HOLIDAY COLONY
- INDIES CONDO
- ISLAND BREAKERS CONDO
- ISLAND HOUSE
- ISLAND HOUSE APT INC – CO
- KEY BISC AMBASSADOR CONDO
- KEY BISC AMBASSADOR CONDO,Key Biscayne Ambassa
- Key Biscayne Ambassador Co
- KEY BISCAYNE COMMODORE CL
- KEY BISCAYNE COMMODORE CL,Commodore
- KEY BISCAYNE ONE HUNDRED
- KEY BISCAYNE VI CONDO
- KEY BISCAYNE VI CONDO,KEY BISCAYNE VI COND
- KEY BISCAYNE VI CONDO,KEY BISCAYNE VICONDO
- KEY BISCAYNES COMMODORE C
- Key Cassa
- KEY COLONY
- KEY COLONY CONDO #4,KEY COLONY CONDO 4
- Key Colony Condo 01,KEY COLONY NO 1
- Key Colony I
- KEY COLONY NO 1
- KEY COLONY NO 1,KEY COLONY
- Key Colony No 1,Key Colony-Tidemark
- KEY COLONY NO 1,Tidemark
- KEY COLONY NO 1,TIDEMARK KEY COLONY
- Key Colony No 2
- KEY COLONY NO 2 CONDO
- KEY COLONY NO 2 CONDO,KEY COLONY NO 2 COND
- KEY COLONY NO 2 CONDO,Oceansoun
- KEY COLONY NO 4 CONDO
- KEY COLONY NO 4 CONDO,Key Colony
- KEY COLONY NO 4 CONDO,Key Colony Botanica
- KEY COLONY NO 4 CONDO,KEY COLONY NO 4 COND
- KEY ISLANDER CONDO
- Key Islander Condo,Key Islander condo
- LAKE TOWER CONDO
- LAKE VILLA ONE CONDO
- LAKE VILLA ONE CONDO,The Ocean Club
- LAKE VILLA THREE CONDO
- LAKE VILLA TWO CONDO
- Le Phare Condo,Le phare
- LE PHARE KEY BISCAYNE CON
- LE PHARE KEY BISCAYNE CON,Le Phare
- LE PHARE KEY BISCAYNE CON,LE PHARE KEY BISCAYN
- MAR-AZUL CONDO
- MASHTA ISLAND
- MASHTA ISLAND A REPLAT OF
- MATHESON ESTATES
- MATHESON ESTATES,MATHESON STATES
- NORTH SUNRISE INC CONDO
- OCEAN LANE PLAZA CONDO
- Ocean Tower 2,Ocean Club
- OCEAN TOWER ONE CONDO
- OCEAN TOWER ONE CONDO
- OCEAN TOWER ONE CONDO,Ocean Club
- OCEAN TOWER ONE CONDO,OCEAN TOWER ONE COND
- OCEAN TOWER TWO CONDO
- OCEAN TOWER TWO CONDO,OCEAN TOWER TWO COND
- OCEAN VILLAGE CONDO
- OCEAN VILLAGE CONDO,OCEAN VILLAGE
- OCEAN VILLAGE CONDO,Ocean Village Condo
- Oceana Key Biscayne
- OCEANA KEY BISCAYNE CONDO
- OCEANA KEY BISCAYNE CONDO,OCEANA
- OCEANA KEY BISCAYNE CONDO,OCEANA KEY BISCAYNE
- Oceansound Phase II
- RESORT VILLA ONE CONDO
- RESORT VILLA ONE CONDO,Resort Villa One
- RESORT VILLA ONE CONDO,RESORT VILLA ONE CON
- RESORT VILLA TWO CONDO
- SANDS OF KEY BISCAYNE CON
- SANDS OF KEY BISCAYNE CON,SANDS OF KEY BISCAYN
- SANDS OF KEY BISCAYNE,SANDS OF KEY BISCAYN
- SMUGGLERS COVE
- SOLIMAR CONDO OF KEY BISC
- SOLIMAR CONDO OF KEY BISC,SOLIMAR CONDO
- SUNRISE CLUB CONDO
- SUNRISE CLUB CONDO,100 SUNRISE
- SUNRISE MANOR CONDO
- THE EMERALD BAY
- THE EMERALD BAY Key Colony
- THE EMERALDBAY
- THE EMERALDBAY @ KEY COLO
- THE EMERALDBAY @ KEY COLO,KEY COLONY
- THE EMERALDBAY @ KEY COLO,THE EMERALD BAY
- THE EMERALDBAY @ KEY COLON
- THE EMERALDBAY KEY COLONY
- The Ocean Club
- THE PALMS OF KEY BISCAYNE
- THE PYRAMIDS @ KEY BISCAY
- TIDEMARK KEY COLONY NO 1,Key Colony
- Tidemark,Key Colony
- TOWERS OF KEY BISCAYNE CO
- TOWERS OF KEY BISCAYNE CO,The Towers of Key Bi
- TOWERS OF KEY BISCAYNE CO,TOWERS OF KEY BISCAY
- TOWERS OF KEY BISCAYNE CON
- TROPICAL ISLE HOMES SUB
- TROPICAL ISLE HOMES SUB 1
- TROPICAL ISLE HOMES SUB 2N
- TROPICAL ISLE HOMES SUB 3
- TROPICAL ISLE HOMES SUB 3,TROPICAL ISLE HOMES
- TROPICAL ISLE HOMES SUB 4
- VILLAHARBOUR APTS CONDO
Market Summary
Current real estate data for Condo in Key Biscayne as of Apr 27, 2026
133
Condo Listed
102
Avg DOM
1,158
Avg $ / SqFt
$2,680,903
Avg List Price
Property Summary
- Located in the GRAND BAY RESIDENCES COND,GRAND BAY subdivision, 445 Grand Bay Drive # 1A Key Biscayne FL is a Condo for sale in Key Biscayne, FL, 33149. It is listed for $18,900,000 and features 5 beds, 6 baths, and has approximately 8,435 square feet of living space, and was originally constructed in 1997. The current price per square foot is $2,241. The average price per square foot for Condo listings in Key Biscayne is $1,158. The average listing price for Condo in Key Biscayne is $2,680,903. To schedule a showing of MLS#a11954185 at 445 Grand Bay Drive # 1A in Key Biscayne, FL, contact your CENTURY 21 Carioti agent at 2392986550.
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