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Home > Listings > FL > Key Colony > 431 12th St, Key Colony, FL 33051
Active

431 12th St, Key Colony, FL 33051

$3,900,000
$893 per ft²
4 Bed
4 Bath
4,369 Sq Ft
0.22 Acres
Listing Office: Florida Keys Real Estate Group
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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.

Listing Agent: Kristen Brenner

License Number: 3410920

Offered by: Florida Keys Real Estate Group

Office Phone: 305-743-8507

MLS: #A11992273

Miami MLS

Date Added: 04/01/2026 12:00:00 am

Last Update: 04/02/2026 05:56:07 pm

Days on Market: 6

Interior

  • General: First Floor Entry, Built-in Features, Entrance Foyer, Walk-In Closet(s), Media Room, Recreation Room, Utility Room/Laundry
  • Appliances: Dishwasher, Dryer, Microwave, Electric Range, Refrigerator, Washer
  • Laundry: Utility Room/Laundry
  • Flooring: Carpet, Ceramic Floor
  • A/C: true, Attic Fan, Ceiling Fan(s), Central Air
  • Heating: true, Central

Exterior

  • General: Open Balcony
  • Style: Attached, Two Story, Split Level
  • Other Structures: Open Balcony, Patio
  • Pool: In Ground, Concrete, Heated
  • Parking: Additional Spaces Available, Circular Driveway, Driveway, Paver Block

Construction

  • Roofing: Metal Roof
  • Windows: High Impact Windows, Impact Glass
  • General: CBS Construction

Location

  • Originating MLS: Miami Association of REALTORS®
  • County: Monroe County

Lot

  • Zoning: R-1A - Key Colony S, LT 13 COURY SUBDIVISION PB7-13 KEY COLONY OR801-2296 OR892-197 OR929-1531 OR940-336 OR942-2002C OR1050-558 OR1072-1943 OR1096-2403 OR1171-55, 00079871-001300
  • View: Canal, Pool, View

Utilities

  • Water: Municipal Water
  • Sewer: Public Sewer

Financial

  • Source: Miami Association of REALTORS®

Property

  • Year Built: 1993
  • Type: Single Family Home
  • Style: Attached, Two Story, Split Level
  • Parcel #: 00079871-001300
04/01/2026$3,900,000@ 893 per ft²Listed
04/01/2026Active

Listing Broker

1 @
Email: paul@ecillin.com
Phone: 5612717117

Property For Sale

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Last Updated: 04/02/2026 05:56:07 pm

Offered by: Kristen Brenner, 3410920, 305-743-8507 @ Florida Keys Real Estate Group

MLS: #A11992273

Source: Miami MLS

<IMG SRC='https://d37ukvrrv3in12.cloudfront.net/mls/logos/idx.png' ALT='IDX'> © 2026 Miami Association of REALTORS®. All rights reserved. The data relating to real estate on this web site comes in part from the Internet Data Exchange program of the MLS of the Miami Association of REALTORS®. All information is deemed reliable but not guaranteed by the MLS and should be independently verified. The MLS, this broker and their affiliates provide all content therein “AS IS” and without any warranty, express or implied. The information included in this listing is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. This property is offered without respect to any protected classes in accordance with the law. Data displayed may be a portion of, and not a complete set of all listings published in the MLS.

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Home > Listings > FL > Key Colony > 431 12th St, Key Colony, FL 33051

431 12th St, Key Colony, FL 33051 is a 4 Bed, 4 Bath, 4,369 Sq Ft, 0.22 Acres, Single Family Home built in 1993.

This property is currently available and was listed by Miami MLS on 04/01/2026 12:00:00 am. The MLS # for the property is MLS #A11992273.

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