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431 12th Street
Key Colony FL 33051 US

$3,700,000

Active Listing ID 619302
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4 bed
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4.00 Bath (4 Full)
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Lot: 0.22 Acres
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Single Family Residence

$3,700,000

Active Listing ID 619302
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431 12th Street Discover an exceptional D'Asign Source designer home in prestigious Key Colony Beach, set on a beautifully landscaped lot with effortless access to both the bay and the open ocean. This spacious 4 bedroom 4 bath, light-filled residence offers generous living areas with soaring ceilings and oversized windows that seamlessly connect the indoors with the stunning natural surroundings. The expansive ground floor is perfectly designed for entertaining and family living, featuring a large living room, gourmet kitchen, formal dining area, and a dedicated media room and one guest bedroom and a two-car garage currently used as a versatile game room. A whole-home stereo system adds to the refined ambiance throughout. Built with enduring quality, the waterfront home features all-concrete construction and a brand-new custom metal imitation barrel tile roof. At the heart of this private oasis lies a beautiful swimming pool with an inviting tiki hut -- an ideal retreat for family gatherings and relaxed entertaining. Complementing this is a deep-water dock equipped with a powerful 30, 000-pound hydraulic boat lift, offering effortless access to the bay and beyond. Perfectly suited for a large family or those who love to host, this magnificent Key Colony Beach estate delivers space, luxury, and unparalleled waterfront living in one of the Florida Keys' most sought-after communities.

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Property Features

  • Facts
  • Lot Size: 0.22 Acres
  • Property Type: Residential
  • Property Sub-type: Single Family Residence
  • Features
  • Full Bathrooms: 4
  • Cooling System: Attic Fan, Central Air
  • Exterior Finish: Fencing, Gazebo, Rain Gutters, Lighting, Sprinkler System
  • Floor Covering: Carpet, Tile
  • Roof Type: Metal
  • Additional Features
  • Patio
  • Pool
  • Waterfront

Property

  • propertytype: Residential
  • propertysubtype: Single Family Residence
  • listprice: 3700000
  • unparsedaddress: 431 12th Street
  • postalcity: Key Colony
  • stateorprovince: FL
  • country: US
  • postalcode: 33051
  • bathroomsfull: 4
  • bathroomshalf: 0
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 0.22
  • lotsizeunits: Acres
  • lotsizearea: 0.22
  • livingarea: 4369
  • livingareaunits: Square Feet
  • latitude: 24.721648
  • longitude: -81.025879
  • listagentfullname: Brenner Scheel Casey
  • listagentemail: flakeysrealestategroup@gmail.com
  • listagentkey: 3yd-MLKARFL-20260103165710310680000000
  • listagentmlsid: 200
  • listagentpreferredphone: 3057833395
  • listagentofficephone: 3057833395
  • listofficekey: 3yd-MLKARFL-20170803193027566074000000
  • listagentstatelicense: BK339103, BK3179545, SL3504409
  • listofficemlsid: 1055699
  • disclaimer: Copyright © 2026 Marathon and Lower Keys Association of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
  • sourcesystemid: MLKARFL
  • yearbuilt: 1993
  • listingcontractdate: 2026-03-23
  • listagenturl: http://flakeysrealestategroup@gmail.com
  • countyorparish: Monroe
  • parcelnumber: 00079871001300
  • appliances: Washer, Dryer, Dishwasher, Refrigerator, Range, Microwave, Disposal, Ice Machine
  • cooling: Attic Fan, Central Air
  • constructionmaterials: CBS, Concrete
  • flooring: Carpet, Tile
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 2
  • parkingtotal: 0
  • roof: Metal
  • waterfrontyn: True
  • franchiseaffiliation: Independent
  • interiorfeatures: Built-in Cabinets, Granite Counter Top, Storage, Walk-in Closet(s)
  • exteriorfeatures: Fencing, Gazebo, Rain Gutters, Lighting, Sprinkler System
  • rooms: Bedroom 4, Bedroom 1, Bathroom 4, Bathroom 3, Bedroom 2, Bedroom 3, Bathroom 2, Bathroom 1
  • securityfeatures: Security
  • otherstructures: Storage, Gazebo
  • patioandporchfeatures: Patio
  • dock: False
  • poolprivateyn: True
  • spayn: False
  • fencing: Fenced
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • location: -81.02588, 24.721647
  • openhouse: { "AppointmentRequiredYN": false, "ListingKey": "3yd-MLKARFL-619302", "OpenHouseEndTime": "2026-07-04 13:00:00", "OpenHouseId": "6248279", "OpenHouseRemarks": "KEY COLONY BEACH - Huge deepwater home with a PRIVATE swimming pool, 30, 000 LB hydraulic boat lift and so much more! Come and see for yourself!", "OpenHouseStartTime": "2026-07-04 11:00:00", "OpenHouseType": null, "VirtualOpenHouseURL": null }
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"Florida Keys Real Estate Group", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "CustomSourceId":null, "Expenses":[], "GeocodeOptions":null, "LeadRoutingEmail":"flakeysrealestategroup@gmail.com", "ListBrokerageCity":"Marathon", "ListBrokerageCountry":"US", "ListBrokerageEmail":"duckkeyfl7@gmail.com", "ListBrokerageLogoUrl":null, "ListBrokerageName":"Florida Keys Real Estate Group", "ListBrokeragePhone":"(305) 664-1453", "ListBrokeragePostalCode":"33050", "ListBrokerageStateOrProvince":"FL", "ListBrokerageUnitNumber":null, "ListBrokerageUnparsedAddress":"11287 Overseas Highway", "ListBrokerageWebsiteUrl":"https://www.floridakeysrealestategroup.com/", "ListOfficeAddress1":"11287 Overseas Highway ", "ListOfficeAddress2":null, "ListOfficeBrokerMlsId":"20170803193027566074000000", "ListOfficeCity":"Marathon", "ListOfficeCountry":"US", "ListOfficeEmail":"duckkeyfl7@gmail.com", "ListOfficePostalCode":"33050", "ListOfficeStateOrProvince":"FL", "ListPriceCurrencyType":"USD", "ListingTitle":"SINGLE_FAMILY - Key Colony, FL", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/431-12th-St_Key-Colony-Beach_FL_33051_M58307-01061?f=listhub&s=MLKARFL&m=619302&c=rexren", "MLSModificationTimestamp":"2026-07-05 06:36:33", "Neighborhoods":[{"Description":null, "Name":"Coury Sub (53.5)"}], "PostalCode":null, "RoomCount":null, "StateOrProvince":null, "Taxes":[{"TaxAnnualAmount":14023, "TaxDescription":"Lt 13 Coury Subdivision Pb7-13 Key Colony Or801-2296 Or892-197 Or929-1531 Or940-336 Or942-2002C Or1050-558 Or1072-1943 O", "TaxYear":"2025"}], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 7/11/2026 3:15:20 AM GMT
Source Updated Date: 7/12/2026 12:43:58 AM GMT

Courtesy of: Brenner Scheel Casey, Florida Keys Real Estate Group, flakeysrealestategroup@gmail.com

Copyright © 2026 Marathon and Lower Keys Association of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.