SOLD NOV 14, 2025

Off market nov 2025 for $625K

—

•

885

sq ft

421 10Th St, Key Colony, FL 33051

About this home

Waterfront Living in Key Colony Beach! Opportunity to update this 2-bedroom, 2-bathroom half duplex situated on a wide canal in the heart of Key Colony Beach to make it your own! Offers 37.5 feet of dockage, providing effortless access to both the Ocean and the Gulf via nearby Vaca Cut. Inside, this home offers a comfortable and functional layout, making it ideal for full-time living, a vacation retreat, or an investment rental. Located in the highly sought-after Key Colony Beach, you'll have access to playgrounds, scenic walking paths, a par-3 golf course, Sunset Park, and popular restaurants—all just a short stroll away. Whether you're an avid boater, golfer, or simply love the laid-back island lifestyle, this home is a perfect fit. Don't miss this incredible opportunity to own a waterfront gem in the Florida Keys!

Multi-familyProperty Type

1970Year Built

4,125 sq ftLot Size

$706Price/Sq.Ft.

Listed by Natalie Ardis • Coldwell Banker Schmitt Real Estate Co.

Bought with Germain Garcia • Lifestyle International Realty

Redfin checked: a few seconds ago

•Source:FLKMLS #614159

Redfin Estimate

Unfortunately, we don't have enough data to generate an accurate Estimate at this time.

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

3 MoM

New listings for sale

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$2,200,000
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NEW 8 HRS AGO
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$3,300,000
4 beds3.5 baths2,540 sq ft
355 Stirrup Key Blvd, Marathon, FL 33050
(305) 743-5181
OPEN FRI, 1PM TO 3PM
$550,000
2 beds2 baths973 sq ft
303 Sombrero Blvd #207, Marathon, FL 33050
NEW 12 HRS AGO
$825,000
3 beds3 baths1,320 sq ft
712 26th St, Marathon, FL 33050
$1,999,950
3 beds2 baths1,710 sq ft
415 Sombrero Beach Rd, Marathon, FL 33050
$150,000
— beds— baths— sq ft
10684 7th Avenue Gulf, Marathon, FL 33050
$150,000
— beds— baths— sq ft
4 of 4 Tbr 22nd St. Ocean-no RE, Marathon, FL 33050
$150,000
— beds— baths— sq ft
TBR 125 117th Street Ocean, Marathon, FL 33050
$110,000
— beds— baths— sq ft
000 Overseas Hwy, Marathon, FL 33050
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— beds— baths— sq ft
39th Tbr Only St, Marathon, FL
See all

Provided by Redfin

Sale history for 421 10Th St

Date

Event

Price

FLKMLS #614159

Nov 14, 2025

Sold

$625,000

$706/sq ft

Oct 10, 2025

Contingent

—

Sep 26, 2025

Price Changed

$649,000

$733/sq ft

May 7, 2025

Price Changed

$699,000

$790/sq ft

Mar 13, 2025

Listed

$725,000

$819/sq ft

FLKMLS #535123

May 15, 2020

Listing Removed

—

Mar 18, 2006

Listed

$750,000

$847/sq ft

FLKMLS #548562

Aug 31, 2010

Sold

$225,000

$254/sq ft

Apr 21, 2009

Listed

$385,000

$435/sq ft

FLKMLS #521648

Feb 25, 2005

Sold

$585,000

$661/sq ft

Apr 26, 2004

Listed

$599,000

$677/sq ft

FLKMLS #522456

Jun 14, 2004

Sold

$525,000

$593/sq ft

Jun 14, 2004

Listed

$525,000

$593/sq ft

FLKMLS #508963

Jan 8, 2002

Listing Removed

—

Oct 29, 2001

Listed

$299,000

$338/sq ft

FLKMLS #500725

Jan 31, 2000

Sold

$159,000

$180/sq ft

Jan 12, 2000

Listed

$159,000

$180/sq ft

Public record

Beds

—

Baths

—

Stories

—

Lot width

—

Lot depth

—

Lot size

—

Year renovated

—

Sq. Ft.

—

Year built

—

Style

Single Family Residential

County

Monroe County

APN

00076320-000100

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Mar 13, 2025.

Property details

Parking

Parking / Garage Information
Vehicle Storage: Open Parking, Off Street Parking, Guest Parking

Interior

Interior Features
Interior Features: Smoke Alarms
Flooring: Tile Floor
Windows/Doors: Single Hung Windows, Sliding Glass Doors
Heating: Electric
Cooling/Heating: Central A/C
Appliances: Washer, Microwave, Oven, Range, Refrigerator, Dishwasher, Dryer
Furnished: Unfurnished

Bathroom Information
# of Full Baths: 2

Exterior

Boat Slip/Dock Information
Dockage: Seawall: Concrete

Exterior Features
Porch/Balcony: Screened P/B
Shutters: Accordion, Bahama

Security
Patrolled Area

Property Features
On Waterfront
Waterfront Type: Canal Front
Waterview: Canal View

Property Information
Deed Restrictions: Unknown
Pets: Pets Allowed
Rentals Allowed: With Restrictions
Min Rental Days: 7

Lot Information
Acres: 0.09
Zoning: R-2A - Key Colony Two Family
Land Size: Less Than 1/4 Acre
Control Depth: 4
Flood Zone: AE

Building Information
Year Built: 1,970
Sq. Ft. Source: Property Data Card
Building Style: Conch
Building Style: Above Flood: No
Construction: CBS
Roof: Tar/Gravel Roof

Subdivision/Neighborhood
Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5)
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)

Financial

Tax Information
Taxes: $6,012.75
Tax Year: 2,024
Tax Exemptions: None

Financial Information
Terms: No Seller Finance

Utilities

Utility Information
Utilities: FKAA, Buyer to Verify, Municipal Sewer
Pre-Wired: Cable
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: US-1 to Sadowski Cswy turn right onto W. Ocean Dr. turn right on 10th street about half way down on the left.

Neighborhood Features
Tennis Courts, Bike Paths

Public facts

Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: —
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: Monroe County
APN: 00076320-000100

Home facts updated by county records on Mar 13, 2025

Around this home

Schools

Stanley Switlik Elementary School

Public PreK-5 • Assigned • 4.5mi

5/10

Marathon School

Public 6-12 • Assigned • 3.6mi

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)

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

Sell confidently with a local market expert in Key Colony. 3 minutes to get started.

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Home values near 421 10Th St

Data from public records.

Address	Redfin Estimate
471 10th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 908 Sq. Ft.	$1,026,414
441 10th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 885 Sq. Ft.	$845,881

Address	Redfin Estimate
381 10th St, Key Colony Beach, FL 3 Beds \| 3 Baths \| 2166 Sq. Ft.	$1,129,744
371 10th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1302 Sq. Ft.	$896,429

Address	Redfin Estimate
431 10th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 885 Sq. Ft.	$810,180
361 10th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1302 Sq. Ft.	$842,245

Property information provided by FLKMLS when last listed in 2025. This data may not match . Learn more.

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About this home

Redfin Estimate

Market trends in Key Colony Beach, FL

Sale history for 421 10Th St

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 33050

Home values near 421 10Th St

More real estate resources