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445 Grand Bay, #PH-1A

Key Biscayne, FL 33149

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445 Grand Bay, #PH-1A

Key Biscayne, FL 33149

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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

MLS# A11954185
Price $18,900,000
Status Active
Beds 5
Full Baths 5
Half Baths 1
Square Feet 8,435 ft² / 784 m²
Price Per Sq Ft $2,241
Type Residential
Year Built 1997
Taxes $54,141 / Year
HOA Fees $9,923 / Monthly
Subdivision GRAND BAY RESIDENCES COND
Waterfront Yes

Property Details

MLS# A11954185
Price $18,900,000
Beds 5
Full Baths 5
Half Baths 1
Square Feet 8,435 ft² / 784 m²
Price Per Sq Ft $2,241
Type Condominium
Status Active
Year Built 1997
Taxes $54,141 / Year
HOA Fees $9,923 / Monthly
Subdivision GRAND BAY RESIDENCES COND
Waterfront Yes

Location

Listing Courtesy of One Sotheby's International Realty

Property Information

General Information
    General Information
  • For Lease: No
  • Pet Restrictions : No
  • County Or Parish : Miami-Dade
  • Zip Code : 33149
  • City : Key Biscayne
  • List Price : $18,900,000
    Maintenance / Tax Information
  • Tax Amount : $54,141
  • Tax Year : 2025
  • Membership Required : No
    Building Information
  • Property Type : Residential
  • Subdivision : GRAND BAY RESIDENCES COND
    School Information
  • Elementary School : Key Biscayne K-8
  • Middle School : Ponce De Leon
  • Senior High School : Coral Gables
Virtual Tour / Features / Utilities
    Interior
  • Room Count : 3
  • Equipment Appliances : Dryer, Dishwasher, Electric Range, Electric Water Heater, Disposal, Ice Maker, Microwave, Oven, Refrigerator, Washer
  • Floor Description : Carpet,Marble,Wood
  • Interior Features : Wet Bar, Bidet, Built In Features, Breakfast Area, Bathtub, Closet Cabinetry, Dining Area, Separate Formal Dining Room, Dual Sinks, Entrance Foyer, Eat In Kitchen, High Ceilings, Main Level Primary, Pantry, Soaking Tub, Separate Shower, Walk In Closets
  • Beds Total : 5
  • Num of Full Baths : 5
  • Num of Half Baths : 1.0
  • Furnished : Unfurnished
  • Spa : No
    Exterior
  • Exterior Features : Balcony, Outdoor Living Area
  • Construction Type : CBSConcreteBlockStructure,Block
  • Front Exposure : East
  • Pool : No
  • Pool Description : Association
  • Windows Treatment : Blinds, Drapes, Rods
  • Security : ElevatorSecured, FireAlarm, SecuredGarageParking, SmokeDetectors, SecurityGuard
    Parking
  • Parking Description : Covered, Garage, GarageDoorOpener, Valet
    Utilities
  • Cooling Description : Electric
  • Heating Description : Electric
Property / Lot Information
    Community Information
  • Association Fee: $9,923
  • Assoc Fee Paid Per: Monthly
    Building Information
  • Parcel Number Free Text: 2452050491350
Request Details

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More information

445 Grand Bay, #PH-1A is a waterfront condo for sale in Key Biscayne, FL 33149. This property was listed for sale on Feb 14, 2026 by One Sotheby's International Realty for $18,900,000. Located in GRAND BAY RESIDENCES COND is a 5-bed, 5-bath, 8,435 ft² / 784 m² sqft condo built in 1997.

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