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Canalfront Duplex
For Sale
$1,170,000

440 9th Street, Key Colony Beach, FL 33051

Residential, Key Colony, FL

Property Size1,682 SF
Lot Size0.10 Acres
Price / SF$695.60
Days on Market162

Property Features for 440 9th Street

General Information

Property type Residential
Property subtype Duplex
Zoning R-2A - Key Colony Two Fam
Bedrooms 3
Bathrooms 2
Full bathrooms 2
Rooms Bedroom 2, Bathroom 1, Bathroom 2, Bedroom 3, Bedroom 1
Parking features Open, RV
Patio and Porch features Deck, Patio
Pets allowed Yes
Interior features Storage, Quartz Countertops
Appliances Washer, Dryer, Dishwasher, Refrigerator, Range, Microwave
Subdivision Key Colony Bch 1st Addn Amd Plat (53.5)
Directions Overseas Hwy mile marker 53.5 turn at light onto Sadowski/KCB Causeway. Turn right onto W. Ocean Dr. Turn right onto 9th St. Follow to #440 9th on the right
Standard status Active
Size 1,682 SF
Lot size 0.10 Acres

Taxes and HOA fees

Tax Year 2025
Tax Description BK 9 S 1/2 LT 49 KEY COLONY BEACH FIRST ADDN PB4-11 SHELTER KEY OR1378-2402 OR1531-2373 OR1531-2382/84 OR2616-52/53 OR29
Tax Annual Amount 7477
Legal Description BK 9 S 1/2 LT 49 KEY COLONY BEACH FIRST ADDN PB4-11 SHELTER KEY OR1378-2402 OR1531-2373 OR1531-2382/84 OR2616-52/53 OR29

Utilities

Utilities Cable Available
Cooling system Central Air
Water front 1

Amenities

deck
private dock
boat lift

Building Details

Year built 1995
Floors in Building 1
Flooring type Tile
Building materials CBS
Roof type Metal
Additional Structures Storage
Listing Agency: Ocean Sotheby's International · Sotheby's International Realty
Listed By: Karen D Raspe · License #3226605
Added: May 11 Changed: Oct 17 Last Checked: Oct 19 at 10:06PM
MLS# 619889

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.

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Investment Insights

Based on property information with market context.

This 1,682-square-foot duplex property on a 0.1-acre lot includes three bedrooms and two bathrooms. The 1995-built home has an open living, dining, and kitchen area, quartz countertops, tile flooring, central air, and storage. Sliding doors connect the interior to a deck and patio. A private dock with a 10,000-pound lift serves the 37.5 feet of deep-water canal frontage. The roof is metal, and the property has CBS construction.

Located in Key Colony Beach, the property is approximately five minutes from the open ocean and Gulf, with Marathon International Airport 3 miles away. Zoning is R-2A - Key Colony Two Fam. Additional features include open parking with RV parking, cable availability, and a washer, dryer, dishwasher, refrigerator, range, and microwave.

Key Highlights

  • 37.5 feet of deep‑water canal frontage
  • Private dock with 10,000‑pound boat lift
  • 1,682 square feet on a 0.1‑acre lot

Property Analytics

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Location Intelligence

Trade Area within ½ mile

409
Businesses Nearby

Demographics for 33051, FL

790
Population
1,132
Households
0.7
Avg Household Size
63
Median Age
48%
College-Educated
95%
High-School Grad
0.4 sq mi
ZIP Area
1,975
Density / Sq Mi
$94,531
Median Household Income
$38,860
Median Earnings
$1,849
Median Rent
$834,800
Median Home Value
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Market

Vacancy Rate% for Multifamily in South region

8.5% 2022
10.2% 2023
11.4% 2024
11.3% 2025

Frequently Asked Questions

What type of property is this?
Duplex - Updated island residence with private dock and boat lift along a deep-water canal.
Where is this duplex located?
The property is located at 440 9th Street Key Colony Beach, FL.
What is the asking price?
The asking price for this property is $1,170,000.
What are key features of this property?
This property features: 37.5 feet of deep‑water canal frontage; Private dock with 10,000‑pound boat lift; 1,682 square feet on a 0.1‑acre lot
More about this property
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