* * NEW IMPROVED PRICE * * MOTIVATED SELLER * * Bring an offer for this fabulous 2-bedroom, 2-bathroom half-duplex, which is situated along a clean, wide canal with 30 feet of dock space, providing easy access to the open ocean. The property boasts an updated kitchen and bathrooms, spacious bedrooms, and a lovely screened-in porch. It comes fully furnished, making it ready for immediate move-in. Located at the end of the street, it offers privacy and a view of Shelter Bay. There are bikes, kayaks, and a fish-cleaning table. Key Colony is known as the 'GEM' of the Florida Keys. You can walk or bike to the pickleball courts, 9-hole golf course, walking path, sunset park, restaurants, shopping, marina, and post office. Only an hour to Key West or Key Largo. Own your very own piece of paradise!!!
Single-familyProperty Type
1967Year Built
3,300 sq ftLot Size
$870Est. Price/Sq.Ft.
Listed by Sally Pasteris• Key Colony Beach Realty
Bought with Karen Raspe• Ocean Sotheby's International
Claim this home to receive a free report every month with insights on the changing estimate.
Earn from this home
Rent
$2,221/mo
Redfin rental estimate
List your home for rent
Market trends in Key Colony Beach, FL
Last updated September 2026
Buyer's Market
Seller's Market
Buyer's market
Sale-to-List Price
95.3%
+0.0% MoM
Median sale price
$1.8M
$214K MoM
Avg. days on market
204d
20 days MoM
Recently sold homes
18
3 MoM
Provided by Redfin
Sale history for 520 4Th St
Date
Event
Price
FLKMLS #612507
May 22, 2025
Sold
$700,000
$791/sq ft
Mar 21, 2025
Contingent
—
Mar 7, 2025
Price Changed
$750,000
$847/sq ft
Jan 30, 2025
Price Changed
$787,499
$890/sq ft
Jan 1, 2025
Price Changed
$799,999
$904/sq ft
Dec 1, 2024
Listed
$810,000
$915/sq ft
FLKMLS #610204
Dec 1, 2024
Listing Removed
—
Oct 7, 2024
Price Changed
$810,000
$915/sq ft
Aug 9, 2024
Price Changed
$815,000
$921/sq ft
May 29, 2024
Listed
$825,000
$932/sq ft
FLKMLS #603009
Feb 28, 2023
Sold
$755,000
$853/sq ft
Jan 31, 2023
Contingent
—
Jan 24, 2023
Relisted
—
Dec 29, 2022
Contingent
—
Nov 6, 2022
Listed
$765,000
$864/sq ft
+24
MOTIVATED SELLER! Adorable 2 bedroom, 2 bath half duplex on clean, wide canal with 30 feet of dockage! Enjoy the East facing backyard offering nice afternoon shade while enjoying your waterfront views. Being sold furnished and turn key enabling you to continue successful vacation rental income. Located at the end of the street offering privacy and a peek of Shelter Bay. Cabana Club membership in place and can be transferred, plus you're in close walking distance to the club! A great opportunity to own on Key Colony Beach!
FLKMLS #588907
Apr 30, 2020
Sold
$524,000
$592/sq ft
Dec 31, 2019
Listed
$549,000
$620/sq ft
FLKMLS #567270
May 15, 2020
Listing Removed
—
Apr 20, 2015
Listed
$520,000
$588/sq ft
FLKMLS #563451
May 15, 2020
Listing Removed
—
Feb 10, 2014
Listed
$479,000
$541/sq ft
As the MLS and public records start to fill up, we'll list the details here.
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
Financial
Tax Information
Taxes: $6,131.43
Tax Year: 2,023
Tax Exemptions: None
Utilities
Utility Information
Utilities: FKAA, Community Sewer Plant
Has Public Sewer Hook-up
Location
Homeowners Association Information
Association Info: 1st Right of Refusal: No
Association Info: Association Fee $: 0.00
Fee Includes: None
Location Information
Side: Ocean
Mile Marker: 53.50
Directions: Turn onto Sadowski Causeway continue around the curve and 4th will be your 2nd left. Property is near the end of the street on the right hand side.
Neighborhood Features
Beach
Public facts
Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: —
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: Monroe County
APN: 00072900-000100
Home facts updated by county records on Dec 2, 2025
Around this home
Schools
Stanley Switlik Elementary School
Public PreK-5 • Assigned • 5.0mi
5/10
Marathon School
Public 6-12 • Assigned • 4.1mi
5/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
Heat Factor
We're working on getting current and accurate heat risk information for this home.
10/10 Wind Factor
99% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Key Colony, FL • 33051
Average low and high temperatures (°F)
73
64
75
68
79
71
81
75
85
79
87
81
89
82
90
82
87
79
84
78
79
73
77
70
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10 hours in
June and 7.3 hours in December, placing it above the
U.S. average for solar exposure.
10 hrs
7.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$732,000 – $886,000
Sell confidently with a local market expert in Key Colony. 3 minutes to get started.