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For sale
  • Price cut: $405K (3/18)
    $3,995,000

    360 12th St, Marathon, FL 33051

    5beds
    3,578sqft
    : 
    Single Family Residence
    Built in 1977
    0.42 Acres Lot
    $3,638,800 Zestimate®
    $1,117/sqft
    $-- HOA

    What's special

    Waterfront estateOne-car garageGenerous islandLarge bedroomTwo full lotsGenerously sized laundry roomGreat room
    A Truly Rare Waterfront Estate in Key Colony Beach -- Privacy, Scale, and Turnkey PerfectionPerfectly centered on two full lots, this exceptional Key Colony Beach residence offers a rare level of privacy and space paired with 165 feet of deep-water canal frontage & premier boating access.Fully renovated in 2024, the two-story home is thoughtfully designed for entertaining, guest comfort & everyday coastal living. The first floor serves as a private guest and recreation level, featuring a large bedroom & a spacious nearby full bathroom with double vanities & a separate shower and toilet room. A comfortable TV and lounge area is complemented by a bar, refrigerator, & game table, creating an ideal space for relaxing or hosting guests. This level also includes a one-car garage, a dedicated half-garage for bikes and gear, air-conditioned storage ideal for dive or fishing equipment, & a rare full-length pass-through garage connecting the front of the home directly to the waterfront, with a golf-cart-sized rear garage door providing seamless dock access.The second floor is the main living level & showcases an expansive open-concept kitchen, great room, and oversized dining area with seating for twelve. Filled with natural light, the space is equally suited for large gatherings or relaxed everyday living. The chef's kitchen features premium cabinetry, high-end appliances, and a generous island. Four additional bedrooms are located on this level each with its own en-suite bathroom. The primary suite includes a private balcony, walk-in closet, double vanity, private water closet, and spa-style shower, with a generously sized laundry room also located on this level.Outdoor living defines the property, with two boat lifts rated for 24K & 15K pounds, quick access to both the ocean and Gulf, and a completely remodeled heated saltwater pool surrounded by expansive covered and open patio areas. The east-facing rear exposure offers beautiful morning light & shaded afternoons
    121 days
    |
    473
    |
    18
    |

    Zillow last checked: 7 hours ago

    Listing updated: March 17, 2026 at 01:30pm

    Listed by:

    Jessica Borraccino 305-619-2648,

    Coldwell Banker Schmitt Real Estate Co.

    Source: FLKMLS,MLS#: 617684MLS LogoOriginating MLS: Marathon/Lower Keys

    Tour with a local agent

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 6
      • Full bathrooms: 5
      • 1/2 bathrooms: 1
      Cooling
      • Central Air, Ceiling Fans(s)
      Appliances
      • Included: Washer, Microwave, Oven, Range, Refrigerator, Dishwasher, Dryer
      Features
      • Wet Bar, Storage, Walk-In Closet(s), Pantry, Split Bedroom
      • Doors: Impact Rstnce Doors
      • Windows: Impact Rstnce Window
      Interior area
      • Total interior livable area: 3,578 sqft

      Property

      Parking
      • Parking features: Garage, Trailer Storage, Off Street
      • Has garage: Yes
      Features
      • Levels: Two
      • Stories: 2
      • Patio & porch: Open Porch/Balcony
      • Exterior features: Bar, Storage, Outdoor Kitchen, Lighting
      • Has private pool: Yes
      • Pool features: Heated, In Ground, Concrete
      • Fencing: Fenced
      • Has view: Yes
      • View description: Canal
      • Has water view: Yes
      • Water view: Canal
      • Waterfront features: Canal Front, Waterfront, Dock: Concrete, Dock Length: 165, Dockage: Boat Lift
      Lot
      • Size: 0.42 Acres
      • Features: More than 1 Lot
      Details
      • Parcel number: 00077580000000
      • Zoning: R-1A
      • Zoning description: Key Colony Single Family

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Single Family Residence
      Materials
      • Combo Construction
      • Roof: Metal
      Condition
      • Updated/Remodeled
      • New construction: No
      • Year built: 1977

      Utilities & green energy

      • Electric: Elect Separate Meter
      • Sewer: Public Sewer
      • Utilities for property: FKAA, Buyer to Verify

      Community & HOA

      Community
      • Features: Tennis Court(s), Bike Paths, Airport/Runway, Beach
      • Security: Patrolled Area
      • Subdivision: Key Colony Bch 2nd Addn (53.5)
      HOA
      • Has HOA: No
      • Services included: None
      Location
      • Region: Marathon

      Financial & listing details

      • Price per square foot: $1,117/sqft
      • Tax assessed value: $2,786,460
      • Annual tax amount: $19,336
      • Date on market: 12/12/2025
      • Listing terms: Cash,Conventional
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        Estimated market value

        $3,638,800

        $3.46M - $3.82M

        $7,940/mo

        Price history

        Price history
        DateEventPrice
        3/18/2026Price change$3,995,000-9.2%$1,117/sqft
        Source: Key West AOR #617684 Report a problem
        12/12/2025Listed for sale$4,400,000+76%$1,230/sqft
        Source: Key West AOR #617684 Report a problem
        8/25/2022Sold$2,500,000-23.1%$699/sqft
        Source: MIAMI #A11214871 Report a problem
        8/2/2022Pending sale$3,250,000$908/sqft
        Source: FLKMLS #600863 Report a problem
        7/21/2022Contingent$3,250,000$908/sqft
        Source: Key West AOR #600863 Report a problem
        7/19/2022Price change$3,250,000-7.1%$908/sqft
        Source: Key West AOR #600863 Report a problem
        5/4/2022Listed for sale$3,500,000+84.2%$978/sqft
        Source: Key West AOR #600863 Report a problem
        8/11/2004Sold$1,900,000$531/sqft
        Source: Public Record Report a problem

        Public tax history

        Public tax history
        YearProperty taxesTax assessment
        2025$22,594 +16.8%$2,194,085 +11.2%
        2024$19,336 -13.7%$1,973,111 -13.2%
        2023$22,397 +147.6%$2,273,544 +142.8%
        2022$9,045 -1.1%$936,509 +3%
        2021$9,147 +4.9%$909,233 +1.4%
        2020$8,723 $896,680 +2.3%
        2019$8,723 +2.2%$876,521 +1.9%
        2018$8,534 +5.8%$860,178 +3.2%
        2017$8,063 +5.7%$833,182 +2.1%
        2016$7,628 -2%$816,046 +0.7%
        2015$7,783 $810,373

        Find assessor info on the county website

        Monthly payment

        Est. payment
        $22,813/mo
        Principal & interest
        $20083
        Property taxes
        $2730
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          Climate risks

          Neighborhood: 33051

          Getting around

          4 / 100
          Car-Dependent
          27 / 100
          Somewhat Bikeable

          Nearby schools

          GreatSchools rating

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