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

Overview

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 a ... (Read more)

Listing Details MLS# 619302

Location, Tax & Legal

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
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

Contract Information

Listing Board: Marathon/Lower Keys

General Property Description

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

Association Info

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

Dockage

Dock Length: 80
Dock: Composite
Boat Lift: Yes

More Information

Building Style

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

Vehicle Storage

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

Pool Info

Heated: Yes
In Ground: Yes
Concrete: Yes

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.

Fee Includes

None: Yes

Tax Exemptions

None: Yes

Appliances

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

Pets

Pets Allowed: Yes

Cooling

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

Waterfront

Canal Front: Yes

Waterview

Canal View: Yes

Floor

Carpet: Yes
Tile: Yes

Neighborhood Feature

Bike Paths: Yes
Fire Hydrant: Yes
Tennis Courts: Yes

Interior Features

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

Specialty Rooms

Laundry Room: Yes

Windows/Doors

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

Security

No Security: Yes

Construction

CBS: Yes
Concrete: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Negotiable: Yes

Terms

Cash: Yes
Conventional: Yes

Utilities

Elect Separate Meter: Yes
FKAA: Yes
Municipal Sewer: Yes

Porch/Balcony

Patio: Yes

Title

Title Ins - Buyer: Yes

Exterior Features

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

Roof

Metal Roof: Yes

Accessibility Feat

None: Yes

Shutters

Other: Yes

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.