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For sale
    • $18,900,000

    445 Grand Bay Dr #Penthouse 1a, Key Biscayne, FL 33149

    5beds
    8,435sqft
    : 
    $130,330/mo
    Get pre-qualified
    Condominium
    Built in 1997
    -- sqft lot
    $16,855,200 Zestimate®
    $2,241/sqft
    $-- HOA

    What's special

    Completely remodeled kitchenFully renovated private libraryGolden lightEndless blue waterDramatic foyer
    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.
    161 days
    |
    273
    |
    17
    |

    Zillow last checked:

    Listing updated:

    Listed by:

    Brigitte Nachtigall 305-710-9664,

    One Sotheby's International Realty,

    Jorge Boj 305-803-6956,

    One Sotheby's International Realty

    Source: MIAMI,MLS#: A11954185MLS LogoOriginating MLS: A-Miami Association of REALTORS

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 6
      • Full bathrooms: 5
      • 1/2 bathrooms: 1
      Rooms
      • Room types: Den/Library/Office, Family Room, Great Room
      Heating
      • Electric
      Cooling
      • Electric
      Appliances
      • Included: Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Microwave, Electric Range, Refrigerator, Oven, Washer
      Features
      • Built-in Features, Closet Cabinetry, Entrance Foyer, Pantry, Volume Ceilings, Walk-In Closet(s), Wet Bar
      • Flooring: Carpet, Marble, Wood
      • Doors: High Impact Doors
      • Windows: Blinds, Drapes
      • Common walls with other units/homes: Corner Unit
      Interior area
      • Total structure area: 11,260
      • Total interior livable area: 8,435 sqft

      Property

      Parking
      • Parking features: 2 Or More Spaces, Covered, Valet, No Rv/Boats, No Trucks/Trailers, Garage Door Opener
      Features
      • Levels: One
      • Entry location: Foyer
      • Exterior features: Balcony
      • Pool features: Association
      • Has view: Yes
      • View description: Bay, Ocean
      • Has water view: Yes
      • Water view: Bay,Ocean
      • Waterfront features: Ocean Access, Ocean Front
      Details
      • Parcel number: 2452050491350
      • Lease amount: $0

      Construction

      Type & style
      • Home type: Condo
      • Property subtype: Condominium
      • Attached to another structure: Yes
      Materials
      • CBS Construction
      Condition
      • Year built: 1997

      Utilities & green energy

      • Electric: Fuses

      Community & HOA

      Community
      • Security: Fire Alarm, Smoke Detector, Elevator Secure, Secured Garage/Parking, Security Guard
      • Application fee: $150
      • Pet fee: $0
      • Senior community: Yes
      • Subdivision: Grand Bay Residences Cond,Grand Bay
      HOA
      • Has HOA: Yes
      • Amenities included: Bike Storage, Community Room, Fitness Center, Pool
      Location
      • Region: Key Biscayne

      Financial & listing details

      • Price per square foot: $2,241/sqft
      • Tax assessed value: $8,365,000
      • Annual tax amount: $54,141
      • Date on market: 2/14/2026
      • Listing terms: All Cash,Conventional

        Estimated market value

        $16,855,200

        $16.01M - $17.70M

        Not available

        Price history

        DateEventPrice
        2/14/2026Listed for sale$18,900,000+66.2%$2,241/sqft
        Source: MIAMI #A11954185 Report a problem
        3/9/2022Sold$11,375,000-18%$1,349/sqft
        Source: MIAMI #A11107677 Report a problem
        12/13/2021Pending sale$13,870,000$1,644/sqft
        Source: MIAMI #A11107677 Report a problem
        12/3/2021Contingent$13,870,000$1,644/sqft
        Source: MIAMI #A11107677 Report a problem
        10/9/2021Listed for sale$13,870,000+519.2%$1,644/sqft
        Source: MIAMI #A11107677 Report a problem
        12/16/1997Sold$2,240,000$266/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$129,559 -1.2%$8,365,000
        2024$131,071 -1.6%$8,365,000
        2023$133,167 +143.7%$8,365,000 +141.4%
        2022$54,649 -0.5%$3,465,817 +3%
        2021$54,926 +1.5%$3,364,871 +1.4%
        2020$54,141 +2.1%$3,318,414 +2.3%
        2019$53,041 +5.3%$3,243,807 +1.9%
        2018$50,350 $3,183,324 +2.1%
        2017$50,350 +1.2%$3,117,850 +2.1%
        2016$49,734 -1.7%$3,053,722 +0.7%
        2015$50,594 -1.5%$3,032,495 +0.8%
        2014$51,361 +3.1%$3,008,428 +1.5%
        2013$49,819 0%$2,963,969 +1.7%
        2012$49,819 +2.3%$2,914,424 +3%
        2011$48,690 -5.6%$2,829,538 +1.5%
        2010$51,577 +7.9%$2,787,723 +2.7%
        2009$47,783 +4.8%$2,714,434 +4.1%
        2007$45,577 -6.8%$2,607,741
        2006$48,916 --
        2005$48,916 +1.2%--
        2004$48,350 +3.5%--
        2003$46,728 +2.9%--
        2002$45,411 --
        2001$45,411 --
        Find assessor info on the county website

        Monthly payment

        Est. payment

        Payment breakdown

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        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: 33149

        Getting around

        49 / 100
        Car-Dependent
        54 / 100
        Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Keybiscayne

        Source: MIAMI. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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