OFF MARKET

Off market sep 2025 for $950K

$1,096,349

Est. refi paymentEst. refi $7,284/mo

•

1,260

sq ft

511 9Th St, Key Colony Beach, FL 33051

About this home

Are you looking for a dream home in Key Colony Beach? You can enjoy the outdoors with plenty of entertaining space. This stilted half duplex with an open balcony overlooks a 100' wide deep water canal with 37.5 of dockage that could be yours! New windows throughout, 2 bedrooms and 2 baths with ample parking and storage. Currently a vacation rental. Also the other side of the duplex is also available for purchase, 501 9TH ST. KCB. Ideally you could own the FULL duplex in Paradise. Key Colony Beach features recreational facilities include 4 parks, 2 playgrounds, bocce courts, pickleball courts, tennis courts, shuffleboard, and a 9-hole par-3 golf course. Call today for your private tour.

Single-familyProperty Type

1986Year Built

4,125 sq ftLot Size

$870Est. Price/Sq.Ft.

Listed by Aimee Kornetti • Coldwell Banker Schmitt Real Estate Co.

Listed by Lynn Goodwin, P.A. • Coldwell Banker Schmitt Real Estate Co.

Bought with outside of mls mls • Outside Of MLS

Redfin checked: 2 minutes ago

•Source:FLKMLS #615272

Redfin Estimate

$1,096,349

$146K since sold in September 2025$17K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.4% higher than the average sale price ($1.05M) of 6 comparable homes.

SOLD SEP 25, 2026
$995,000
A
2 beds2 baths1,288 sq ft
350 11th St, Key Colony Beach, FL 33051
SOLD JUN 3, 2026
$1,000,000
B
2 beds2 baths1,269 sq ft
580 9Th St, Key Colony Beach, FL 33051
SOLD MAR 31, 2026
$1,025,000
C
2 beds2 baths1,269 sq ft
590 9th St, Key Colony Beach, FL 33051
SOLD SEP 14, 2026
$1,232,000
D
2 beds3 baths1,176 sq ft
651 9th St, Key Colony Beach, FL 33051
SOLD DEC 1, 2025
$1,250,000
E
2 beds2 baths1,300 sq ft
470 9Th St, Key Colony Beach, FL 33051
SOLD JUL 20, 2026
$800,000
F
2 beds2 baths1,023 sq ft
741 9Th St, Key Colony Beach, FL 33051

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Earn from this home

Refinance

Est. cash available

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Rent

$2,413/mo

Redfin rental estimate

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Market trends in Key Colony Beach, FL

Last updated September 2026

Buyer's Market

Seller's Market

Buyer's market

Sale-to-list price

94.1%

1.2% MoM

Median sale price

$1.3M

$516K MoM

Avg. days on market

203d

1 days MoM

Recently sold homes

1 MoM

New listings for sale

NEW 7 HRS AGO
$764,000
4 beds2 baths1,380 sq ft
360 3rd St Ocean St, Key Colony, FL 33051
NEW 7 HRS AGO
$764,000
4 beds2 baths1,380 sq ft
360 3rd St, Key Colony, FL 33051
(305) 570-4305
See all

Provided by Redfin

Sale history for 511 9Th St

Year

Property tax

Land + Additions

Assessment*

2025

$7,666 (+3.2%)

2024

$7,430 (+7.5%)

2023

$6,909 (+16.6%)

2022

$5,925 (+10.7%)

2021

$5,354 (+11.2%)

$260,906 + $226,963

$487,869

2020

$4,814 (−3.8%)

$247,500 + $202,625

$450,125

2019

$5,004 (+3.4%)

$247,500 + $202,625

$450,125

2018

$4,841 (+2.3%)

$247,500 + $224,643

$472,143

2017

$4,733 (+12.1%)

$247,500 + $227,088

$474,588

2015

$4,220 (+4.0%)

$247,500 + $222,906

$470,406

2014

$4,059

Tax history for 511 9Th St

Year

Property tax

Land + Additions

Assessment*

2025

$7,666 (+3.2%)

2024

$7,430 (+7.5%)

2023

$6,909 (+16.6%)

2022

$5,925 (+10.7%)

2021

$5,354 (+11.2%)

$260,906 + $226,963

$487,869

2020

$4,814 (−3.8%)

$247,500 + $202,625

$450,125

2019

$5,004 (+3.4%)

$247,500 + $202,625

$450,125

2018

$4,841 (+2.3%)

$247,500 + $224,643

$472,143

2017

$4,733 (+12.1%)

$247,500 + $227,088

$474,588

2015

$4,220 (+4.0%)

$247,500 + $222,906

$470,406

2014

$4,059

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Public record
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

4,125 Sq. Ft.

Year renovated

2006

Sq. Ft.

1,260

Year built

1986

Style

Single Family Residential

County

Monroe County

APN

0566 33 00075660000100

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 10, 2026.

Property details

Parking

Parking / Garage Information
Vehicle Storage: Garage, Open Parking, Attached, Carport

Interior

Virtual Tour

Interior Features
Interior Features: Smoke Alarms
Flooring: Tile Floor
Windows/Doors: Impact Rstnce Window
Cooling/Heating: Central A/C, Ceiling Fans
Appliances: Washer, Microwave, Oven, Refrigerator, Dishwasher, Dryer
Furnished: Furnished

Bathroom Information
# of Full Baths: 2

Specialty Room Information
Specialty Rooms: Other

Exterior

Boat Slip/Dock Information
Dockage: Dock Length: 37
Dockage: Seawall: Concrete
Dockage: Dock: Concrete

Exterior Features
Porch/Balcony: Open Porch/Balcony
Shutters: Accordion

Security
Patrolled Area

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

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

Lot Information
Acres: 0.09
Zoning: R-1A - Key Colony Single Family
Land Size: Less Than 1/4 Acre
Control Depth: 5
Flood Zone: AE

Building Information
Year Built: 1,986
Sq. Ft. Source: Property Data Card
Building Style: Stories: 2
Building Style: Above Flood: Unknown
Construction: CBS, Concrete
Roof: Shingle 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: $7,430.04
Tax Year: 2,024
Tax Exemptions: None

Financial Information
Terms: Cash, Conventional

Utilities

Utility Information
Utilities: FKAA, Buyer to Verify
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

Neighborhood Features
Other Area Features, Bike Paths

Public facts

Beds: 2
Baths: 2.0
Sq. Ft.: 1,260
Stories: 2.0
Lot Size: 4,125 square feet
Style: Single Family Residential
Year Built: 1986
Year Renovated: 2006
County: Monroe County
APN: 0566 33 00075660000100

Home facts updated by county records on Jul 10, 2026

Around this home

Schools

Stanley Switlik Elementary School

Public PreK-5 • Assigned • 4.6mi

5/10

Marathon School

Public 6-12 • Assigned • 3.7mi

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 Beach, 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

Estimated sale price

$1.04M – $1.26M

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

Nearby similar homes

NEW 7 HRS AGO

$764,000

4 beds2 baths1,380 sq ft

360 3rd St Ocean St, Key Colony, FL 33051

Spacious backyard • Patio • Storage

$1,700,000

Land— sq ft

122 N Indies Dr, Duck Key, FL 33050

Water frontage • Concrete dock • Concrete seawall

3D WALKTHROUGH

$2,695,000

2 beds2 baths1,344 sq ft

57457 Morton St, Grassy Key, FL 33050

Private beach • Waterfront dock • Heated concrete pool

3D WALKTHROUGH

$9,999,000

5 beds5 baths5,048 sq ft

65760 Overseas Hwy, Long Key, FL 33001

Atlantic ocean views • Oceanfront pool • Private sandy beach

$140,000

— beds— baths— sq ft

4 of 4 Tbr 22nd St. Ocean-no RE, Marathon, FL 33050

Listed 26 days

$3,275,000

5 beds3 baths2,922 sq ft

59 W Plaza Del Sol, Islamorada, FL 33036

7,500 sq ft lot • Garage • Built 1992

(786) 556-3434

New listings for sale in 33051

NEW 7 HRS AGO

$764,000

4 beds2 baths1,380 sq ft

360 3rd St Ocean St, Key Colony, FL 33051

Spacious backyard • Patio • Storage

NEW 7 HRS AGO

$764,000

4 beds2 baths1,380 sq ft

360 3rd St, Key Colony, FL 33051

Spacious backyard • Patio • Storage

(305) 570-4305

Home values near 511 9Th St

Data from public records.

Address	Redfin Estimate
451 9th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1200 Sq. Ft.	$830,648
521 9th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1418 Sq. Ft.	$1,099,905

Address	Redfin Estimate
571 9th St, Key Colony Beach, FL 3 Beds \| 3 Baths \| 1418 Sq. Ft.	$1,168,155
510 9th St, Key Colony Beach, FL 4 Beds \| 4 Baths \| 1977 Sq. Ft.	$1,539,981

Address	Redfin Estimate
501 9th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1260 Sq. Ft.	$1,134,255
461 9th St, Key Colony Beach, FL 2 Beds \| 2 Baths \| 854 Sq. Ft.	$774,994

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

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in Key Colony Beach, FL

Sale history for 511 9Th St

Tax history for 511 9Th St

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 33051

Home values near 511 9Th St

More real estate resources