OFF MARKET

Off market may 2018 for $435K

$986,945

•

1,536

sq ft

280 - 290 3rd St, Key Colony, FL 33051

About this home

Key Colony Beach Legal DUPLEX. Being Sold in AS IS condition! NEW METAL ROOF IS PLACE. INVESTMENT OPPORTUNITY IN FABULOUS KEY COLONY BEACH, MARATHON. Multi-Unit/Duplex located offers many great features and is in close proximity to marinas, shopping, restaurants, schools, etc. Each side has 2 bedrooms & 2 full baths, full kitchen, open floor plan. Great yard, fenced, with grass, carport for each side, & separate stairs & parking for each side. Great Price! Just a few yards from the Beach! Two electric and water meters. Call Today!

Multi-familyProperty Type

1988Year Built

6,600 sq ftLot Size

$643Est. Price/Sq.Ft.

2 spacesParking

Listed by Robert Valenzuela, PA • Century 21 Circle

Bought with outside of mls mls • Outside Of MLS

Redfin checked: 2 minutes ago

•Source:FLKMLS #574054

Redfin Estimate

$986,945

$552K since sold in May 2018$85K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 34.6% lower than the average sale price ($1.51M) of 6 comparable homes.

SOLD MAR 4, 2026
$1,310,000
A
3 beds4 baths1,596 sq ft
640 9th St, Key Colony Beach, FL 33051
SOLD SEP 1, 2026
$1,790,000
B
4 beds3 baths1,860 sq ft
600 12Th St, Key Colony, FL 33051
SOLD JUL 9, 2026
$1,275,000
C
3 beds2 baths1,642 sq ft
292 Sadowski, KEY COL BCH, FL 33051
SOLD MAY 22, 2026
$1,100,000
D
3 beds3 baths1,511 sq ft
351 8Th St, Key Colony, FL 33051
SOLD APR 10, 2026
$1,340,000
E
4 beds3 baths1,813 sq ft
351 10th St, Key Colony Beach, FL 33051
SOLD APR 20, 2026
$2,237,500
F
3 beds2 baths1,584 sq ft
520 12Th St, Key Colony Beach, FL 33051

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Market trends in 33051, FL

Last updated September 2026

Buyer's Market

Seller's Market

Buyer's market

Sale-to-List Price

96.5%

+0.1% MoM

Median sale price

$497K

$38K MoM

Avg. days on market

257d

173 days MoM

Recently sold homes

1 MoM

Provided by Redfin

Sale history for 280 - 290 3rd St

Public record

Beds

—

Baths

—

Stories

—

Lot width

—

Lot depth

—

Lot size

—

Year renovated

—

Sq. Ft.

—

Year built

—

Style

Multi-Family (2-4 Unit)

County

Monroe County

APN

00072600-000000

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 1, 2026.

Property details

Parking

Parking / Garage Information
Vehicle Storage: Carport, Covered Parking
Vehicle Storage: Car(s): 2

Interior

Interior Features
Flooring: Tile Floor
Cooling/Heating: Central A/C, Ceiling Fans
Appliances: Dishwasher, Oven, Range, Refrigerator
Furnished: Unfurnished

Bathroom Information
# of Full Baths: 4

Multi-Unit Information
# of Total Units: 2

Exterior

Boat Slip/Dock Information
Dockage: Other Dockage, None

Exterior Features
Porch/Balcony: Open Porch/Balcony, Patio

Property Features
Waterfront Type: None
Waterview: No Waterview

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

Lot Information
Acres: 0.15
Zoning: R-3 - Multi Unit Res
Land Size: Less Than 1/4 Acre
Flood Zone: AE

Building Information
Year Built: 1,988
Sq. Ft. Source: Property Data Card
Building Style: Above Flood: No
Construction: CBS, Combo Construction, Frame
Roof: Shingle Roof

Subdivision/Neighborhood
Subdivision: Key Colony Beach (53.5)

Financial

Tax Information
Taxes: $3,596.24
Tax Year: 2,016
Tax Exemptions: None

Utilities

Utility Information
Utilities: FKAA, Elect Separate Meter, Water Separate Meter, Municipal Sewer
Has Public Sewer Hook-up

Location

Homeowners Association Information
Association Info: 1st Right of Refusal: No
Fee Includes: None

Location Information
Side: Ocean
Mile Marker: 53.50
Directions: Overseas Hwy (US 1) traffic light at Sadowski Causeway which is Key Colony Beach Entrance drive towards the Ocean make a left at end of road Make a left at 3rd Street, property will be on your right.

Public facts

Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: —
Style: Multi-Family (2-4 Unit)
Year Built: —
Year Renovated: —
County: Monroe County
APN: 00072600-000000

Home facts updated by county records on Oct 1, 2026

Around this home

Schools

Stanley Switlik Elementary School

Public PreK-5 • Assigned • 5.1mi

5/10

Marathon School

Public 6-12 • Assigned • 4.2mi

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

93/ 100

Exceptional sunlight

Sunscore

There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8.9 hrs

6.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$938,000 – $1.14M

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

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Home values near 280 - 290 3rd St

Data from public records.

Address	Redfin Estimate
330 3rd Street, Key Colony Beach, FL 3 Beds \| 2 Baths \| 1300 Sq. Ft.	$855,637
300 3rd Street, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1031 Sq. Ft.	$681,440

Address	Redfin Estimate
310 3rd Street, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1031 Sq. Ft.	$598,157
311 3rd Street, Key Colony Beach, FL 2 Beds \| 1 Baths \| 882 Sq. Ft.	$642,254

Address	Redfin Estimate
281 3rd Street, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1206 Sq. Ft.	$1,167,331
290 3rd Street, Key Colony Beach, FL 4 Beds \| 4 Baths \| 1536 Sq. Ft.	—

Property information provided by FLKMLS when last listed in 2017. This data may not match . Learn more.

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All mortgage lending products and information are provided by Rocket Mortgage, LLC | NMLS #3030; www.NMLSConsumerAccess.org. Licensed in 50 states. This site is not authorized by the New York State Department of Financial Services for mortgage solicitation or loan applications activities related to properties located in the State of New York.

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GreatSchools Ratings provided by GreatSchools.org.

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