DockOnly™

The only MLS search built exclusively for boaters. Find your dock home.

Company

  • About
  • Contact
  • Blog

Search

  • By City
  • By County
  • Dockominiums

Services

  • Marine Services
  • Dock Builders
  • Find Contractors

For Agents

  • Become a Partner
  • Referral Program
  • Featured Listings

Legal

  • Privacy Policy
  • Terms of Use
  • MLS Compliance

© 2026 DockOnly™. All rights reserved.

DockOnly™ and Dock Score™ are trademarks of Blue Mar Real Estate Group Inc.

Blue Mar Real Estate Group

Blue Mar Real Estate Group Inc.

Licensed Florida Real Estate Broker

DBPR License CQ1018554

Listing data provided by Miami Realtors MLS via Bridge Data Output. Information deemed reliable but not guaranteed. Dock Score™ is a DockOnly.com rating and is not provided by or affiliated with the MLS or listing broker. NOAA chart data is public domain and for reference only — not for navigation. Full MLS Compliance

Equal Housing OpportunityEqual Housing Opportunity

© 2026 Miami Association of REALTORS®. IDX information provided exclusively for personal, non-commercial use. Listing data last updated every 30 minutes.

This website complies with the Fair Housing Act. We do not discriminate on the basis of race, color, religion, sex, national origin, familial status, or disability.

DockOnly™
SearchMarketsDockominiums
SearchMarketsDockominiumsSaved
Real Estate Agents
Home
SearchSaved
431 12th St photo 1
431 12th St photo 2
431 12th St photo 3
431 12th St photo 4
431 12th St photo 5
431 12th St photo 6
431 12th St photo 7
431 12th St photo 8
431 12th St photo 9
431 12th St photo 10
431 12th St photo 11
431 12th St photo 12
431 12th St photo 13
431 12th St photo 14
431 12th St photo 15
431 12th St photo 16
431 12th St photo 17
431 12th St photo 18
431 12th St photo 19
431 12th St photo 20
431 12th St photo 21
431 12th St photo 22
431 12th St photo 23
431 12th St photo 24
431 12th St photo 25
1 / 25
431 12th St
25 photos
431 12th St photo 2
431 12th St photo 3
431 12th St photo 4
431 12th St photo 5
+20

431 12th St

Key Colony, FL, 33051

Active

$3,700,000

431 12th St

Key Colony, FL, 33051

Active

$3,700,000

4

Bedrooms

4

Bathrooms

4,369 sqft

Living Area

1993

Year Built

Mortgage Calculator

Estimate your monthly payment for this waterfront property

20%

$740,000 down

%
Principal & Interest$19,199/mo
Property Tax (est. ~1.2%, varies by county)$3,700/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$23,149
Loan Amount: $2,960,000Rate: 6.75%
Get Pre-Qualified

Estimated payments only. Actual rates and terms may vary.

Comparable Sales

$3,700,000Tour the dockSchedule a Showing
Navigation note: Navigation routes show the shortest mapped path to open water. A vessel taller than the binding bridge clearance may still reach open water via a longer alternate route that we don't currently map — verify navigability with a local captain or surveyor before relying on it.

9,600

Lot Size (sqft)

27

Days on Market

Dock Score™

DockOnly
94
Excellent

What shaped this score

✓Ocean Access
✓Dock with boat lift
✓No fixed bridges
✓Fits boats up to ~58ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

Dock & Water AccessMLS

Ocean AccessCanal FrontCanal Width 1-80 FeetNo Fixed Bridges📝 30K-lb boat lift📝 deep water

AI Aerial Imagery Detection

Dock DetectedSeawall DetectedDeep Water Indicators~49-67 ft dock

Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.

Canal WidthDockOnly

At the dock

County parcel data
106ft
dock106 ft105.8104106

Width sampled every 10 ft from dock · perpendicular measurement

Measured perpendicular from this parcel's waterfront edge to the parcel directly across the canal, using surveyed county GIS boundaries.

Will it turn around?

Up to 26 ft

Easy
handling

26–35 ft

Fits
with care

35–40 ft

Tight
(back-in)

Boats over 40 ft can't turn around here — back in/out only. Clear channel ≈ 53 ft once boats are docked both sides (Monroe rules cap each side ~26 ft). Wide-beam yachts need the upper end of each range.

Navigation RouteDockOnly

Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.

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.

Schedule a Showing

See the property and tour the dock. A licensed waterfront specialist will arrange your private showing.

Select a date

Location

Key Colony, FL, 33051

No price history available for this property.

Listing courtesy of Florida Keys Real Estate Group

Last updated: 6/16/2026

© 2026 Miami Association of REALTORS®, Inc. All rights reserved. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the Miami Association of REALTORS®. Information is deemed reliable but not guaranteed. All properties are subject to prior sale, change, or withdrawal.

IDX information is provided exclusively for consumers' personal, non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Dock Score™

DockOnly
94
Excellent

What shaped this score

✓Ocean Access
✓Dock with boat lift
✓No fixed bridges
✓Fits boats up to ~58ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

Nearest Bridge Clearances

Florida Keys — critical for tall/large vessels

No bridge data available for this location.
FEMA Flood Zone AE
BFE: 7ft

Special Flood Hazard Area

View FEMA Flood Map →
Loading nearby marinas…
Loading nearby sandbars…

Similar Listings

145 Venetian Drive$3.4M

145 Venetian Drive

Islamorada, FL

4 4 3,182 sqft

Listed by Langley Knight Gardner Islamorada

231 E Shore Drive Unit 2$4.3M

231 E Shore Drive Unit 2

Key West, FL

5 4,103 sqft

Listed by Serhant

$2.6M

Islamorada, FL

3 4 1,768 sqft

Listed by American Caribbean Real Estate

865 50th Street Gulf$4.5M

865 50th Street Gulf

Marathon, FL

5 5 3,826 sqft

Listed by AmeriFirst Realty

44 W Plaza Del Lago$4.8M

44 W Plaza Del Lago

Lower Keys, FL

4 5 4,464 sqft

Listed by Pine River Realty, LLC.

231 E Shore Drive Unit 6$4.4M

231 E Shore Drive Unit 6

Key West, FL

5 4,103 sqft

Listed by Serhant

Swipe or use arrows to see more