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For sale
  • Price cut: $350K (6/9)
    $4,850,000

    31449 Avenue I, Big Pine Key, FL 33043

    5beds
    3,500sqft
    : 
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    Single Family Residence
    Built in 2025
    7,840 Square Feet Lot
    $4,629,800 Zestimate®
    $1,386/sqft
    $-- HOA

    What's special

    Round porthole windowSleek contemporary kitchenCustom ultra-modern smart homeTwo covered upper decksVaulted ceilingsSleek contemporary linesWalk-in closet
    Dolphinus del Sol is a Waterfront Estate Masterpiece! Enjoy this custom, ultra-modern smart home! This new construction, solid precast concrete home, offers unparalleled luxury, with vaulted ceilings, sleek contemporary lines, and expansive windows and doors showcasing breathtaking panoramic water views. Experience mesmerizing sun and moon rises over the water, views of distant islands, bridges, boats cruising by, sea life, etc. This tropical paradise features a boating canal and private dock, with vessel access to both the Gulf and the Atlantic Ocean. Bridge clearance is 11 ft. Entertain in style with the upper level, grand, open living room and kitchen area, which features soaring ceilings and walls of glass, with 8ft opening to the deck for al fresco dining. The sleek contemporary kitchen has a round porthole window. A mirror panel opens to a sliding appliance tray from the pantry. Black stainless steel smart appliances compliment the black, dazzling mirror fleck Silestone countertops. Floors throughout are custom designed, stained and sealed. The unique, curved wall master bedroom has a seating area by the glass doors, that open for a tropical breeze and a walk-in closet. The en suite master bath, is an expansive oasis featuring a jetted tub and 5 x 5 ft shower. The lower living level great room features a large theater/entertainment area with two walls of windows that have sweeping water views. This 3500 sq ft, 5 bedroom, 4 bath home also has outdoor space including two covered upper decks and a 500 sq ft ground level patio featuring sea life art. Also there is a garage and under house parking for up to 6 vehicles. The 2300 sq ft open waterfront area has ample space to add features overlooking the water. This construction exceeds 180 mph hurricane code. This is a solid, precast concrete panel construction, including the floors, roof and stairs. The poured concrete pilings go 9 ft below grade, 5 ft into caprock, connected with a 20 in deep grade beam.
    239 days
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    506
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    11
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    Zillow last checked:

    Listing updated:

    Listed by:

    Stephen Hachey 813-642-6030,

    Flat Fee MLS Realty

    Source: FLKMLS,MLS#: 617356MLS LogoOriginating MLS: Key West Association

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 4
      • Full bathrooms: 4
      Heating
      • Central, Electric
      Cooling
      • Central Air, Ceiling Fans(s)
      Appliances
      • Included: Washer, Ice Machine, Microwave, Range, Refrigerator, Dishwasher, Dryer
      Features
      • Cathedral Ceiling(s), Walk-In Closet(s), Other
      • Flooring: Concrete
      Interior area
      • Total interior livable area: 3,500 sqft

      Property

      Features
      • Levels: 3 Stories
      • Stories: 3
      • Patio & porch: Open Porch/Balcony, Patio
      • Exterior features: Storage
      • Has view: Yes
      • View description: Ocean, Canal
      • Has water view: Yes
      • Water view: Ocean,Canal
      • Waterfront features: Gulf Front, Waterfront, Dockage: Other Dockage
      Lot
      • Size: 7,840 Square Feet
      • Features: Less Than 1/4 Acre
      Details
      • Parcel number: 00110960000000
      • Zoning: OTH
      • Zoning description: Other Zoning

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Other Bldg Style
      • Property subtype: Single Family Residence
      Materials
      • Other
      • Roof: Concrete
      Condition
      • Year built: 2025

      Utilities & green energy

      • Sewer: Public Sewer
      • Utilities for property: Other - See Remarks

      Community & HOA

      Community
      • Security: Other
      • Subdivision: Sands Sub (31.0)
      HOA
      • Has HOA: No
      • Services included: None
      Location
      • Region: Big Pine Key

      Financial & listing details

      • Price per square foot: $1,386/sqft
      • Tax assessed value: $1,594,694
      • Annual tax amount: $4,414
      • Date on market: 11/18/2025
      • Listing terms: Cash,FHA,VA Loan,Conventional

        Estimated market value

        $4,629,800

        $4.40M - $4.86M

        $7,388/mo

        Price history

        DateEventPrice
        6/9/2026Price change$4,850,000-6.7%$1,386/sqft
        Source: Key West AOR #617356 Report a problem
        5/4/2026Price change$5,200,000-10.3%$1,486/sqft
        Source: FLKMLS #617356 Report a problem
        11/18/2025Listed for sale$5,800,000+2009.1%$1,657/sqft
        Source: Key West AOR #617356 Report a problem
        8/14/2020Sold$275,000-6.8%$79/sqft
        Source: FLKMLS #590363 Report a problem
        3/21/2020Listed for sale$295,000+181%$84/sqft
        Source: Coldwell Banker Schmitt RE Co. Lower Keys Office #590363 Report a problem
        4/16/1996Sold$105,000-19.2%$30/sqft
        Source: Public Record Report a problem
        6/19/1995Sold$130,000$37/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$13,155 +198%$1,328,925 +329.2%
        2024$4,415 +5.4%$309,614 +10%
        2023$4,188 +42.2%$281,467 +10%
        2022$2,946 +3.5%$255,879 +10%
        2021$2,845 +12.2%$232,617 +28.8%
        2020$2,536 $180,556 +10%
        2019$2,536 +13.6%$164,142 +5.6%
        2018$2,232 +2.1%$155,427 -52.2%
        2017$2,187 -36.4%$325,470 +19%
        2016$3,437 +7.8%$273,559 +12%
        2015$3,188 $244,142
        Find assessor info on the county website

        Monthly payment

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        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: 33043

        Getting around

        14 / 100
        Car-Dependent
        64 / 100
        Bikeable

        Nearby schools

        GreatSchools rating

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