431 12th St, Key Colony, FL 33051 - Photo 1

Save This Listing

Close

1/33

View All Photos

$3,900,000 Just Listed

For Sale
Active
Single Family
4 Beds
4 Full Baths
4,369 Sq. Ft.
Updated 2 days ago

See This Home

Save This Listing

Close

1/33

Property 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.

Virtual Tour

Full Property Details

Full Property Details for 431 12th St

General

Price: $3,900,000
Taxes: $14,023 (2025)
Status: Active
Type: Single Family
Source: Greater_Miami
MLS ID: A11992273
Updated: 4/2/2026
Added to Site: 3 day(s) ago

Interior

Interior Features: 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
Flooring: Carpet, Ceramic Floor

Rooms

Bathrooms

Total Bathrooms: 4
Full Bathrooms: 4
Primary Bathroom: Dual Sinks, Separate Tub & Shower, Whirlpool/Spa

Bedrooms

Total Bedrooms: 4
Bedroom Features: At Least 1 Bedroom Ground Level, Primary Bath Shower, Primary Bath Tub, Primary Bedroom Upstairs

Other Rooms

Living Room: Media Room, Recreation Roo Sq. Ft.
Dining Room: Breakfast Area, Formal Dining
Laundry: Utility Room/Laundry

Additional Information

Pool: Yes
Pool Description: In Ground, Concrete, Heated
Security/Safety: Smoke Detector

Exterior

Exterior Features: Open Balcony
Deck/Patio: Open Balcony, Patio

Parking

Garage: Yes
Attached garage: Yes
Garage Spaces: 2
Covered Spaces: 2
Parking Features: Additional Spaces Available, Circular Driveway, Driveway, Paver Block

Location

Area: Coury Subd
County: Monroe County
Subdivision: COURY SUBD
Building Name: COURY SUBD
Driving Directions: Overseas Highway to Sadowski Causeway. Turn right onto W Ocean Dr. Turn right onto 12th St to 431 12th St on the left.
Direction Faces: Southwest

Community

Community Name: Coury Subd
Pets Allowed: Yes

Heating & Cooling

Air Conditioning: Yes
Cooling Type: Attic Fan, Ceiling Fan(s), Central Air
Heating Type: Central

Utilities

Sewer: Public Sewer
Water: Municipal Water

Structural Information

Architectural Style: Attached, Two Story, Split Level
Structure Type: House
Detached/Attached: Detached
Construction: CBS Construction
Roof: Metal Roof
Windows: High Impact Windows, Impact Glass
Entry Location: Foyer
Building Size: 5361
Square Feet: 4,369
Living Area: 4,369 Sq. Ft.
Year Built: 1993

Lot Features

Property View: Canal, Pool
Lot Size (Sq. Ft.): 9,600
Frontage Feet: 80
Lot Features: Less Than 1/4 Acre Lot
Zoning: R-1A - Key Colony S

Water Features

Water Front: Yes
Water View: Yes
Water Front Desc.: Ocean Access, Canal Front, Canal Width 1-80 Feet, No Fixed Bridges

Financial Considerations

Price Per Sq. Ft.: $892.65
Tax Amount: $14,023
Tax Year: 2025
Terms: All Cash, Conventional

Disclosures and Reports

Legal Description: 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
Restrictions: No Restrictions
Inclusions: Boatlift, Private Dock, Unrestricted Salt Water Access
Property ID: 00079871-001300

Listed by Florida Keys Real Estate Group

Quickly Find Out More

* Indicates a required field

Comment optional

Full Name *

Email Address *

Mobile Phone Number *

See this property in person

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Send Message, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If an Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby’s International Realty®). I acknowledge that I have read and agree to the Terms of Use and Privacy Notice.

We Value Your Privacy

Listing agent

— 431 12th St —

Florida Keys Real Estate Group

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender

NMLS#: 1598647

Get Pre-Approved

Schools

Schools serving 431 12th St

School District:Monroe County School District, Middle Torch Key, FL

Name	Grades	Distance
Stanley Switlik Elementary School 3400 Overseas Highway, Marathon, FL 33050	PK-5	4.4 mi
Marathon School 350 Sombrero Beach Road, Marathon, FL 33050	6-12	3.5 mi

Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 431 12th St Get Price Alerts and Save Property

Date

Details

Price

Change

Source

4/01/2026

Listed

$3,900,000

255.35%

MLS

8/09/2013

Sold

$1,097,500

—

Public Record

Get Price Alerts and Save Property

Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History

Tax History for 431 12th St

Year

Property Taxes

Change

Tax Assessment

Change

2024

$14,001

—

$1,494,967

3%

2024

$14,001

2%

$1,452,835

3%

2023

$13,685

3%

$1,410,520

6%

2021

$13,347

1%

$1,329,551

-3%

2022

$13,176

-1%

$1,369,437

20%

2021

$13,347

13%

$1,145,578

-2%

2019

$11,807

—

$1,174,021

-2%

2018

$11,820

13%

$1,200,877

7%

2017

$10,440

6%

$1,122,045

13%

2016

$9,837

-3%

$992,460

-2%

2015

$10,119

1%

$1,008,422

3%

2014

$10,053

-9%

$974,515

-7%

2013

$11,077

—

$1,050,615

—

View All

Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost

Estimate the Cost for 431 12th St

431 12th St, Key Colony, FL 33051 (MLS# A11992273) is a Single Family property with 4 bedrooms and 4 full bathrooms. 431 12th St is currently listed for $3,900,000 and was received on April 01, 2026. Want to learn more about 431 12th St? Do you have questions about finding other Single Family real estate for sale in Key Colony? You can browse all Key Colony real estate or contact a Coldwell Banker agent to request more information.

431 12th St Key Colony, FL 33051