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For sale
  • $1,495,000

    651 9th St, Key Colony Beach, FL 33051

    2beds
    1,176sqft
    : 
    Half Duplex, Single Family Residence
    Built in 1989
    4,356 Square Feet Lot
    $1,409,700 Zestimate®
    $1,271/sqft
    $-- HOA

    What's special

    Skylit spa-style bathExceptional waterfront residenceGenerous primary suiteSoaring wood ceilingsJetted tubElegant marble deckingLight-filled space
    This exceptional waterfront residence in Key Colony Beach offers the perfect blend of refined comfort, thoughtful design, and effortless island living. Lovingly owned, gently used, and never rented, the home reflects true pride of ownership throughout. An elevator, updated kitchen, and custom baths set the stage, while soaring wood ceilings and an open-concept kitchen, dining, and living area create a light-filled space that flows seamlessly through stackable sliders to a spacious screened porcha''ideal for entertaining or unwinding in the coastal breeze. The generous primary suite is a private retreat with porch access and a skylit spa-style bath featuring a jetted tub, walk-in tiled shower, and dual vanities. The lower level is designed for true indoor-outdoor living, featuring an custom, inground swimming pool surrounded by elegant marble decking, along with expansive covered and uncovered paved patios. Mature tropical landscaping enhances privacy, while ample covered and uncovered parking adds everyday convenience. Boaters will love the 37.5-foot dock with boat lift, located on a wide, deep canal with quick, easy access, just minutes to both the open ocean and the Gulf via Vaca Cut. A permitted third full bathroom on the lower level sits next to a large air-conditioned storage area with sliders directly to the patio and dock, making it ideal as an angler's room for fishing gear and water toys. Key Colony Beach is one of the Florida Keys' most desirable island communities, known for its wide, walkable streets, city-maintained infrastructure, and relaxed coastal charm. Residents enjoy access to marinas, a nine-hole golf course, tennis and pickleball courts, playgrounds, dining, and waterfront Sunset Park all just steps or a short bike ride away. Perfectly positioned in the Middle Keys, Key Colony Beach offers a rare combination of small-town island living, world-class boating, and easy access to Marathon's shopping, dining, and local airport.
    54 days
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    556
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    21
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    Zillow last checked: 7 hours ago

    Listing updated: February 27, 2026 at 08:10am

    Listed by:

    Karen D Raspe 305-393-9010,

    Ocean Sotheby's International Realty,

    Jo Ann Cook 305-360-7968,

    Ocean Sotheby's International Realty

    Source: FLKMLS,MLS#: 618394MLS LogoOriginating MLS: Marathon/Lower Keys

    Tour with a local agent

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 2
      • Bathrooms: 3
      • Full bathrooms: 3
      Heating
      • Central
      Cooling
      • Central Air, Ceiling Fans(s)
      Appliances
      • Included: Washer, Stainless Steel Appliance(s), Disposal, Microwave, Range, Refrigerator, Dishwasher, Dryer
      Features
      • Built-in Cabinets, Whirlpool Bath Tub, Walk-In Closet(s), Storage, Elevator, Dade County Pine, Granite Counters, Split Bedroom, Cathedral Ceiling(s)
      • Flooring: Tile
      • Doors: Sliding Glass Doors
      • Windows: Drapes/Blinds Incl, Window Treatments, Single Hung Windows, Accordion
      Interior area
      • Total interior livable area: 1,176 sqft

      Property

      Parking
      • Parking features: Carport, RV Parking Open, Covered, Trailer Storage, Off Street, Guest
      • Has carport: Yes
      • Has uncovered spaces: Yes
      Features
      • Patio & porch: Open Porch/Balcony, Screened P/B
      • Exterior features: Lighting
      • Has private pool: Yes
      • Pool features: Heated, In Ground, Decked
      • 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: 37, Dockage: Boat Lift
      Lot
      • Size: 4,356 Square Feet
      • Dimensions: 37.5 x 110
      • Features: Less Than 1/4 Acre
      Details
      • Parcel number: 00075730000000
      • Zoning: R-2A
      • Zoning description: Key Colony Two Family

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Half Duplex, Single Family Residence
      • Attached to another structure: Yes
      Materials
      • CBS
      • Roof: Metal
      Condition
      • Year built: 1989

      Utilities & green energy

      • Electric: Elect Separate Meter
      • Sewer: Community Swr Plant, Public Sewer
      • Water: Water Separate Meter
      • Utilities for property: FKAA, Cable Available, Buyer to Verify, Cable Connected

      Community & HOA

      Community
      • Features: Tennis Court(s), Bike Paths, Airport/Runway, Beach
      • Security: Smoke Detector(s), Patrolled Area
      • Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5)
      HOA
      • Has HOA: No
      • Services included: None
      Location
      • Region: Key Colony Beach

      Financial & listing details

      • Price per square foot: $1,271/sqft
      • Tax assessed value: $972,572
      • Annual tax amount: $9,607
      • Date on market: 1/30/2026
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        Estimated market value

        $1,409,700

        $1.34M - $1.48M

        $4,632/mo

        Price history

        Price history
        DateEventPrice
        1/30/2026Listed for sale$1,495,000+35.9%$1,271/sqft
        Source: FLKMLS #618394 Report a problem
        7/7/2022Sold$1,100,000$935/sqft
        Source: FLKMLS #601362 Report a problem
        6/23/2022Pending sale$1,100,000$935/sqft
        Source: FLKMLS #601362 Report a problem
        6/10/2022Listed for sale$1,100,000+411.6%$935/sqft
        Source: MLKAR #601362 Report a problem
        3/9/1994Sold$215,000$183/sqft
        Source: Public Record Report a problem

        Public tax history

        Public tax history
        YearProperty taxesTax assessment
        2025$9,607 -3.9%$972,572 -1.5%
        2024$9,993 +4.1%$987,672 +4.7%
        2023$9,599 +46.4%$943,390 +57.5%
        2022$6,557 +10.2%$598,827 +10%
        2021$5,949 +13.4%$544,388 +10%
        2020$5,246 $494,898 -1.1%
        2019$5,246 -1.1%$500,585 +11.3%
        2018$5,302 +14.5%$449,608 +1.4%
        2017$4,632 +3.7%$443,535 +0.5%
        2016$4,468 -0.4%$441,132 +16%
        2015$4,486 $380,165

        Find assessor info on the county website

        BuyAbility℠ payment

        Est. payment
        $8,637/mo
        Principal & interest
        $7615
        Property taxes
        $1022
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          Climate risks

          Neighborhood: 33051

          Getting around

          3 / 100
          Car-Dependent
          28 / 100
          Somewhat Bikeable

          Nearby schools

          GreatSchools rating

          Local experts in 33051

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