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  • 431 12th Street, Key Colony, FL 33051 (MLS# 619302)

431 12th Street, Key Colony, FL 33051

New Listing
$3,900,000
Property Type: Residential Bedrooms: 4 Baths: 4 Square Footage: 4,369 Lot Size (sq. ft.): 9,600 Status: Active
Current Price: $3,900,000 List Date: 4/01/2026 Last Modified: 4/01/2026

Description

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.

More Information MLS# 619302

Contract Information

Listing Board: Marathon/Lower Keys Current Price: $3,900,000 Listing Date: 2026-03-23 List Price: $3,900,000

Location, Tax & Legal

City: KEY COLONY Mile Marker: 53.5 Marathon Neighborhood: N/A Side: Ocean Flood Zone: AE Alternate Key #: 8553536 Parcel #: 00079871001300 Zoning: R-1A - Key Colony Single Family Deed Restrictions: Unknown Legal: Lt 13 Coury Subdivision Pb7-13 Key Colony Or801-2296 Or892-197 Or929-1531 Or940-336 Or942-2002C Or1050-558 Or1072-1943 O Taxes: 14023.44 Tax Year: 2025 Pub Sewer HkUp: Yes Street #: 431 Street Name: 12th Street Suffix: Street Key/Island: Key Colony State/Province: FL Zip Code: 33051 County: Monroe Subdivision: Coury Sub (53.5) Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony

General Property Description

Realtor.COM Type: Residential - Single Family Waterfront: Yes Control Depth: 6 Lot Size: 80 X 120 Lot SqFt: 9600 Pool: Yes Lot Sqft Source: Property Data Card Acres: 0.22 SqFt Source: Property Data Card Rentals Allowed: Yes Min Rental Days: 7 Style: Single Family Year Built: 1993 Living Apx SqFt: 4369 Total Bedrooms: 4 Full Baths: 4 Total Baths: 4

Remarks & Misc

Remarks – Consumer: 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. Directions: Overseas Highway to Sadowski Causeway. Turn right onto W Ocean Dr. Turn right onto 12th St to 431 12th St on the left.

Association Info

Mandatory Home Owners Asc: No 1st Right of Refusal: No Association Fee $: 0

Fee Includes

None: 1

Dockage

Dock Length: 80 Dock: Composite Boat Lift: 1

Tax Exemptions

None: 1

Appliances

Dishwasher: 1 Disposal: 1 Dryer: 1 Ice Machine: 1 Microwave: 1 Range: 1 Refrigerator: 1 Washer: 1

Pets

Pets Allowed: 1

Cooling

Attic Fan: 1 Ceiling Fans(s): 1 Central Air: 1

Waterfront

Canal Front: 1

Waterview

Canal View: 1

Floor

Carpet: 1 Tile: 1

Neighborhood Feature

Bike Paths: 1 Fire Hydrant: 1 Tennis Courts: 1

Interior Features

Built-in Cabinets: 1 Cathedral Ceilings: 1 Drapes/Blinds Incl: 1 Entrance Foyer: 1 Granite Counter Top: 1 Smoke Alarms: 1 Split Bedroom: 1 Storage: 1 Walk-in Closet(s): 1 Window Treatments: 1

Specialty Rooms

Laundry Room: 1

Building Style

Above Flood: Unknown Split Level: 1 Stories: 2 Stories

Windows/Doors

Impact Rstnce Doors: 1 Impact Rstnce Window: 1 Other Windows/Doors: 1

Vehicle Storage

Car(s): 2 Garage: 1 Guest Parking: 1 Attached: 1

Security

No Security: 1

Construction

CBS: 1 Concrete: 1

Land Size

Less Than 1/4 Acre: 1

Furnished

Negotiable: 1

Terms

Cash: 1 Conventional: 1

Utilities

Elect Separate Meter: 1 FKAA: 1 Municipal Sewer: 1

Porch/Balcony

Patio: 1

Title

Title Ins - Buyer: 1

Exterior Features

Fencing: 1 Gazebo: 1 Lighting: 1 Rain Gutters: 1 Sprinkler System: 1

Pool Info

In Ground: 1 Heated: Yes Concrete: 1

Roof

Metal Roof: 1

Accessibility Feat

None: 1

Shutters

Other: 1

Status Change Info

Status: Active

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View Dockage: Boat Lift Building Style: Split Level Vehicle Storage: Garage; Attached; Guest Parking Furnished: Negotiable Cooling: Attic Fan; Ceiling Fans(s); Central Air Utilities: Elect Separate Meter; FKAA; Municipal Sewer Interior Features: Built-in Cabinets; Cathedral Ceilings; Drapes/Blinds Incl; Entrance Foyer; Granite Counter Top; Smoke Alarms; Split Bedroom; Storage; Walk-in Closet(s); Window Treatments Specialty Rooms: Laundry Room Appliances: Dishwasher; Disposal; Dryer; Ice Machine; Microwave; Range; Refrigerator; Washer Exterior Features: Fencing; Gazebo; Lighting; Rain Gutters; Sprinkler System Accessibility Feat: None Pool Info: In Ground; Concrete Construction: CBS; Concrete Shutters: Other Floor: Carpet; Tile Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Bike Paths; Fire Hydrant; Tennis Courts Security: No Security Land Size: Less Than 1/4 Acre Terms: Cash; Conventional Title: Title Ins - Buyer
Listing Office: Florida Keys Real Estate Group
Last Updated: April - 01 - 2026
The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.

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