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New construction
  • Price cut: $4M (4/30)
    $29,500,000

    57783 Morton St, Grassy Key, FL 33050

    10beds
    10,000sqft
    : 
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    Single Family Residence
    Built in 2022
    3.07 Acres Lot
    $-- Zestimate®
    $2,950/sqft
    $-- HOA

    What's special

    Guest and pool housesDeepwater navigable dockQuartzite countersGenerous room proportionsSmart home systemsLuxe outdoor livingPorcelain flooring
    Newly Built Gulf-front Sanctuary with Panoramic Views, Guest and Pool Houses, Luxe Outdoor Living, and a Deepwater Navigable Dock.Set on 3 secluded acres+/- along one of the most protected stretches of the Gulf of America, 57783 Morton Street is a newly completed estate of rare scale, privacy, and modern coastal design. Surrounded by water, sandscape, and tidal ponds alive with marine life, the property offers more than 200'+/- of direct water frontage and uninterrupted views across the open Gulf.Completed in 2025 by builder and developer Alderuccio Corporation, this resilient, elevated retreat is constructed entirely of concrete and impact glass and is designed for effortless indoor-outdoor living. With three distinct finished living spaces totaling approximately 10,000 SF+/-, the estate functions as a private resort offering privacy, recreation, and exceptional access to the best of the Florida Keys.Though private and serene, the estate remains close to everything that defines Keys living. Dining, marinas, and shopping are less than ten minutes away, and the Florida Keys Marathon International Airport lies 4 miles+/- from the property for seamless private aviation access. Deepwater routes, snorkeling coves, and renowned fishing grounds are just moments from the protected 100' dock.The architecture emphasizes clarity, durability, and immersion in water and light. Walls of impact glass capture views of the Gulf, the bay, and the property's own tidal ponds, allowing natural light to animate the interiors throughout the day. Generous room proportions, ceiling heights of 10' to 12', and open circulation reinforce a sense of airiness and connection.Every finish, from porcelain flooring to quartzite counters and exterior of shell-stone, was selected for both resilience and refined coastal style. Smart home systems, solar power with battery backup, and integrated storm protection underscore a commitment to performance and longevity.
    38 days
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    2,302
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    91
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    Zillow last checked:

    Listing updated:

    Listed by:

    Brett Harris PA 305-800-9030,

    Bespoke Real Estate

    Source: FLKMLS,MLS#: 619972MLS LogoOriginating MLS: Marathon/Lower Keys

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 10
      • Bathrooms: 13
      • Full bathrooms: 11
      • 1/2 bathrooms: 2
      Heating
      • Central, Solar, Electric
      Cooling
      • Central Air, Ceiling Fans(s)
      Appliances
      • Included: Washer, Stainless Steel Appliance(s), Ice Machine, Freezer, Microwave, Oven, Refrigerator, Dryer, Other Appliances
      • Laundry: Laundry Room
      Features
      • Fireplace(s), Walk-In Closet(s), Elevator, Built-in Cabinets, Gym, Other Specialty Room, Sun/Florida Room, Media Room
      • Doors: Impact Rstnce Doors
      • Has fireplace: Yes
      Interior area
      • Total interior livable area: 10,000 sqft

      Property

      Parking
      • Total spaces: 3
      • Parking features: Garage, Detached
      • Has garage: Yes
      Features
      • Levels: Two
      • Stories: 2
      • Patio & porch: Open Porch/Balcony, Deck, Screened Patio, Patio
      • Exterior features: Built-in Barbecue, Sandy Beach, Outdoor Shower
      • Has private pool: Yes
      • Pool features: In Ground
      • Has view: Yes
      • View description: Bay/Gulf View
      • Has water view: Yes
      • Water view: Bay/Gulf View
      • Waterfront features: Gulf Front, Waterfront, Sandy Beach, Seawall: Cut/Natural, Dock: Wood, Dock Length: 100, Dockage: Boat Lift, Boat Ramp
      Lot
      • Size: 3.07 Acres
      • Dimensions: 60 x 725
      • Features: 2 Less Than 5 Acres
      Details
      • Additional structures: Detached Guest Qtrs
      • Parcel number: 00375000000000
      • Zoning: RM
      • Zoning description: Residential Medium

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Single Family Residence
      Materials
      • Stucco
      Condition
      • New Construction
      • New construction: Yes
      • Year built: 2022

      Utilities & green energy

      • Sewer: Municipal Sewer
      Green energy
      • Energy generation: Solar

      Community & HOA

      Community
      • Subdivision: Crains Sub (58.0)
      HOA
      • Has HOA: No
      • Services included: None
      Location
      • Region: Grassy Key

      Financial & listing details

      • Price per square foot: $2,950/sqft
      • Tax assessed value: $5,549,027
      • Annual tax amount: $33,507
      • Date on market: 5/20/2026

        Estimated market value

        Not available

        Estimated sales range

        Not available

        $4,934/mo

        Price history

        DateEventPrice
        4/30/2026Price change$29,500,000-11.9%$2,950/sqft
        Source: MIAMI #A11977067 Report a problem
        3/5/2026Listed for sale$33,500,000$3,350/sqft
        Source: MIAMI #A11977067 Report a problem
        1/23/2026Listing removed$33,500,000$3,350/sqft
        Source: MIAMI #A11925907 Report a problem
        12/5/2025Listed for sale$33,500,000+2006.9%$3,350/sqft
        Source: MIAMI #A11925907 Report a problem
        11/1/2018Sold$1,590,000-0.6%$159/sqft
        Source: FLKMLS #577677 Report a problem
        5/24/2018Price change$1,599,000-3%$160/sqft
        Source: Water Vista Realty LLC #577677 Report a problem
        4/26/2018Price change$1,649,000-2.9%$165/sqft
        Source: Water Vista Realty LLC #577677 Report a problem
        12/1/2017Listed for sale$1,699,000-2.9%$170/sqft
        Source: Water Vista Realty LLC #577677 Report a problem
        11/1/2017Listing removed$1,750,000$175/sqft
        Source: Owner Report a problem
        5/2/2017Listed for sale$1,750,000$175/sqft
        Source: Owner Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$33,508 -2.6%$3,852,382 +2.9%
        2024$34,409 +92.4%$3,743,812 +100.9%
        2023$17,887 +79%$1,863,068 +79.2%
        2022$9,994 +8.9%$1,039,497 +14.7%
        2021$9,179 +2.8%$906,195 +1.4%
        2020$8,928 $893,684 -26.6%
        2019$8,928 -28.6%$1,217,976 +30.1%
        2018$12,503 +34.6%$935,920 +21.2%
        2017$9,292 +12.1%$772,333 -5%
        2016$8,287 -7.2%$813,398 -2.1%
        2015$8,926 $830,813

        Find assessor info on the county website

        Monthly payment

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          Payment breakdown

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          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: 33050

          Getting around

          4 / 100
          Car-Dependent
          41 / 100
          Somewhat Bikeable

          Nearby schools

          GreatSchools rating

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