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For sale
  • $4,400,000

    771 12th St, Key Colony Beach, FL 33051

    4beds
    3,878sqft
    : 
    Single Family Residence
    Built in 1986
    0.33 Acres Lot
    $3,972,900 Zestimate®
    $1,135/sqft
    $-- HOA

    What's special

    Extra large lot
    Experience the essence of refined coastal living in this stunning waterfront residence. 120 foot of rare deep water, private, seawalled dockage. 350 ft to open water access Gulf OR Ocean warm turquoise waters! This is an area said to be some of the best fishing grounds worldwide. Located in one the area's most sought-after luxurious neighborhoods . This home sits on an extra large lot. Land areas include 1 lot plus additional 1/2 lot. Room for additional building on the land. Designed for both elegance and ease, this home blends contemporary sophistication with a relaxed tropical ambiance-ideal for entertaining, hosting, or unwinding by the water.The home features two distinct living areas, offering flexibility and space for both lively gatherings and quiet retreats. There are 4 spacious bedrooms, each with its own ensuite bath, providing privacy and comfort, while large windows invite in natural light and serene views of the surrounding palms and canal.Off the pool, a separate 1 bedroom, 1 bath guest suite offers the perfect retreat for family or visitors, with its own private entrance.The AC'd garage, elevated above flood level, provides a versatile space for storage, vehicles & game room. As a flex space with square footage accounted for in the overall total, it can easily be transformed into additional guest quarters, or creative workspace to suit your lifestyle needs.Use the 3-story elevator to ascend to the expansive rooftop terrace, where endless sky and water views set the stage for unforgettable sunsets or evening gatherings.Outdoors, lush tropical landscaping surrounds the home, offering both privacy and natural beauty. A private 120'' dock provides room for all your toys and direct canal access for boating, kayaking, and fishing--inviting you to fully embrace the waterfront lifestyle.Additional features include a full house generator, under house storage separate from the garage, and a large underground cistern.Owner is also the agent.
    91 days
    |
    363
    |
    8
    |

    Zillow last checked: 7 hours ago

    Listing updated: February 03, 2026 at 11:57am

    Listed by:

    Gail V Borysiewicz 305-481-6887,

    Gail's Island Realty, Inc.

    Source: FLKMLS,MLS#: 617826MLS LogoOriginating MLS: Marathon/Lower Keys

    Tour with a local agent

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 4
      • Bathrooms: 5
      • Full bathrooms: 4
      • 1/2 bathrooms: 1
      Heating
      • Central
      Cooling
      • Central Air, Ceiling Fans(s)
      Appliances
      • Included: Washer, Ice Machine, Freezer, Disposal, Microwave, Oven, Range, Refrigerator, Dishwasher, Dryer
      Features
      • Entrance Foyer, Granite Counters, Storage, Elevator, Other Specialty Room
      • Flooring: Tile
      • Doors: Sliding Glass Doors
      • Windows: Window Treatments, Accordion
      Interior area
      • Total interior livable area: 3,878 sqft

      Property

      Parking
      • Parking features: Garage, Off Street
      • Has garage: Yes
      Features
      • Levels: Two
      • Stories: 2
      • Patio & porch: Open Porch/Balcony, Roof Top Deck, Deck
      • Exterior features: Built-in Barbecue
      • Has private pool: Yes
      • Pool features: Heated, In Ground
      • Has spa: Yes
      • Spa features: Private
      • Fencing: Fenced
      • Has view: Yes
      • View description: Canal
      • Has water view: Yes
      • Water view: Canal
      • Waterfront features: Canal Front, Waterfront, Seawall: Concrete, Dock: Wood, Dock Length: 120, Dockage: Boat Lift
      Lot
      • Size: 0.33 Acres
      • Features: 1/4 - 1/2 Acre
      Details
      • Additional structures: Chickee Hut
      • Parcel number: 00079871003000
      • Zoning: R-1A
      • Zoning description: Key Colony Single Family

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Single Family Residence
      Materials
      • CBS
      • Roof: Concrete
      Condition
      • Year built: 1986

      Utilities & green energy

      • Sewer: Municipal Sewer, Public Sewer
      • Utilities for property: FKAA, Cable Available, Buyer to Verify, Cable Connected

      Community & HOA

      Community
      • Features: Tennis Court(s), Bike Paths, Other
      • Security: Smoke Detector(s), Patrolled Area
      • Subdivision: Coury Sub (53.5)
      HOA
      • Has HOA: No
      • Services included: None
      Location
      • Region: Key Colony Beach

      Financial & listing details

      • Price per square foot: $1,135/sqft
      • Tax assessed value: $2,543,440
      • Annual tax amount: $11,745
      • Date on market: 12/25/2025
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        Estimated market value

        $3,972,900

        $3.77M - $4.17M

        $7,889/mo

        Price history

        Price history
        DateEventPrice
        12/25/2025Listed for sale$4,400,000+69.2%$1,135/sqft
        Source: Key West AOR #617826 Report a problem
        6/2/2021Listing removed--
        Source: MLKAR Report a problem
        4/16/2021Listed for sale$2,600,000+100.8%$670/sqft
        Source: MLKAR #595665 Report a problem
        9/19/2014Sold$1,295,000$334/sqft
        Source: FLKMLS #560636 Report a problem
        4/13/2014Listed for sale$1,295,000$334/sqft
        Source: American Caribbean Real Estate Report a problem

        Public tax history

        Public tax history
        YearProperty taxesTax assessment
        2025$11,771 +0.2%$1,250,220 +2.9%
        2024$11,746 +2.5%$1,214,986 +3%
        2023$11,463 +3.9%$1,179,599 +3%
        2022$11,037 -1.2%$1,145,242 +3%
        2021$11,172 +4.9%$1,111,886 +1.4%
        2020$10,651 $1,096,535 +3.3%
        2019$10,651 +3.1%$1,062,011 +1.9%
        2018$10,326 +5.9%$1,042,210 +2.1%
        2017$9,752 +4.6%$1,020,774 +2.1%
        2016$9,327 -2%$999,779 +1.4%
        2015$9,521 $986,044

        Find assessor info on the county website

        BuyAbility℠ payment

        Est. payment
        $25,434/mo
        Principal & interest
        $22427
        Property taxes
        $3007
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          Neighborhood: 33051

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