About This Home

This 4-bedroom, 4-bathroom single family at 431 12th Street in Key Colony, FL is listed for $3,700,000 ($847 per sqft). Built in 1993, the home offers 4,369 sqft of living space on a 0.22 acres lot.

Key Features

  • Built in 1993
  • 0.22 acre lot
  • 2 stories
  • Private pool
  • Waterfront

Property Details

2 stories
4 full
1993

Amenities

PoolWaterfrontA/C
Listing 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.

Monthly Cost Estimate

$19,788/mo

20% down · 6.5% · 30 years

Principal$2,676
Interest$16,033
Insurance$1,079

Estimates only. Actual payments may vary.

Location

431 12th Street

Key Colony, FL 33051

Coury Sub (53.5)

Features & Amenities

Interior Features

Cathedral CeilingsSplit BedroomEntrance FoyerBuilt-in CabinetsGranite Counter TopSmoke AlarmsStorageWalk-in Closet(s)Window Treatments

Exterior Features

FencingGazeboRain GuttersLightingSprinkler System

Property Details

Flooring

CarpetTile

Construction

CBS Concrete

Pool Features

Pool

Outdoor Features

Patio

Cooling

Central AirAttic Fan

Appliances

WasherDryerDishwasherRefrigeratorRangeMicrowaveDisposalIce Machine

Questions & Answers

This 4-bedroom, 4-bathroom single family at 431 12th Street is listed at $3,700,000 ($847/sqft). The estimated monthly payment is $19,788 based on 20% down, a 30-year loan at 6.5% interest, estimated insurance.

Key features include: Built in 1993, 0.22 acre lot, 2 stories, Private pool, Waterfront. Interior Features: Cathedral Ceilings, Split Bedroom, Entrance Foyer. Exterior Features: Fencing, Gazebo, Rain Gutters.

This property is listed by Brenner Scheel Casey.

BC

Brenner Scheel Casey

License BK339103, BK3179545, SL3504409

Agent at Florida Keys Real Estate Group

Listed by Florida Keys Real Estate Group · Broker phone: (305) 664-1453 · View on Broker Site · Broker website

MLS# 619302· Source: Marathon and Lower Keys Association of Realtors· 220 days on PropertySimple

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.

431 12th Street, Key Colony, FL 33051

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