SOLD APR 20, 2026

Off market apr 2026 for $2.2M

$2,251,871

Est. refi paymentEst. refi $15,832/mo

•

1,584

sq ft

520 12Th St, Key Colony Beach, FL 33051

About this home

Welcome to an exceptional island retreat in the heart of Key Colony Beach. This beautifully elevated single-family residence embodies refined coastal luxury, offering 3 bedrooms and 2 bathrooms, bonus space with no detail overlooked. Thoughtfully renovated, the home features a new metal roof, impact-rated windows and doors, elegant LVT flooring, designer lighting, custom cabinetry, and exquisite Cambria quartz countertops throughout. Outdoors, the property transforms into a private resort. Lush tropical landscaping and ambient exterior lighting set the tone, while an outdoor shower, custom bar, and sparkling pool create the perfect setting for entertaining or unwinding in complete privacy. Boating enthusiasts will appreciate 75 feet of concrete dockage with a composite step-down system, seamlessly blending function with style. An expansive, titled upper deck offers a sophisticated space for gatherings, sunset cocktails, and elevated island living. Ideally positioned just moments from the iconic Sunset Park, this residence delivers a rare combination of luxury, lifestyle, and location. A truly turnkey opportunity to own a distinguished piece of paradise in Key Colony Beach. Schedule your private showing today.

Single-familyProperty Type

1985Year Built

8,250 sq ftLot Size

$1,422Est. Price/Sq.Ft.

Listed by Brenner Scheel Casey Casey • Florida Keys Real Estate Group

Bought with Ally Kelley • Ocean Sotheby's International

Redfin checked: 2 minutes ago

•Source:FLKMLS #618093

Redfin Estimate

$2,251,871

$14K since sold in April 2026$13K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 95.7% higher than the average sale price ($1.15M) of 6 comparable homes.

SOLD SEP 22, 2026
$535,000
A
3 beds2 baths1,152 sq ft
103 Stirrup Key Woods Rd, Marathon, FL 33050
SOLD FEB 3, 2026
$1,600,000
B
3 beds2 baths1,776 sq ft
501 11th St, Key Colony, FL 33051
SOLD JUN 12, 2026
$1,900,000
C
2 beds2 baths1,705 sq ft
220 15Th Cir, Key Colony Beach, FL 33051
SOLD SEP 25, 2026
$995,000
D
2 beds2 baths1,288 sq ft
350 11th St, Key Colony Beach, FL 33051
SOLD JUL 9, 2026
$1,275,000
E
3 beds2 baths1,642 sq ft
292 Sadowski, KEY COL BCH, FL 33051
SOLD JUL 6, 2026
$600,000
F
3 beds2 baths1,152 sq ft
22 Stirrup Key Rd, Marathon, FL 33050

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Earn from this home

Refinance

Est. cash available

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Rent

$2,520/mo

Redfin rental estimate

List your home for rent

Market trends in Key Colony Beach, FL

Last updated October 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

$764,000
4 beds2 baths1,380 sq ft
360 3rd St Ocean St, Key Colony, FL 33051
$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 520 12Th St

Date

Event

Price

Public Records

Apr 20, 2026

Sold

$2,125,000

$1,342/sq ft

FLKMLS #618093

Apr 20, 2026

Sold

$2,237,500

$1,413/sq ft

Apr 1, 2026

Contingent

—

Feb 16, 2026

Price Changed

$2,350,000

$1,484/sq ft

Feb 2, 2026

Price Changed

$2,495,000

$1,575/sq ft

Jan 22, 2026

Price Changed

$2,575,000

$1,626/sq ft

Jan 13, 2026

Listed

$2,675,000

$1,689/sq ft

FLKMLS #612403

Dec 18, 2024

Sold

$1,700,000

$1,073/sq ft

Nov 29, 2024

Contingent

—

Nov 23, 2024

Listed

$1,764,999

$1,114/sq ft

+44

Welcome to the Island of Key Colony Beach and to this Single-Family Home on 100 ft wide, deep water canal with access to both the open ocean and Gulf in just five minutes. The 75-foot dock is perfect for all of your vessels, paddle boards and kayaks. Boating, fishing, snorkeling and diving enthusiasts will be overjoyed to call this home in the middle of the Fabulous FL Keys. Enjoy island lifestyle with pool and a covered patio, plus additional outdoor, upper patio accessible from both the kitchen and living room. This home is part of the city of Key Colony Beach, featuring walking and biking paths that connect to the marina, local restaurants, Post Office and City Hall: including golf, pickleball, tennis, and basketball courts. With its own police department and the tranquil Sunset Park nearby, this property offers a rare combination of privacy and convenience. Ideal for those who want the best of boating, outdoor activities, and relaxed living. Bring your bathing suit and ideas to create your ideal retirement home, island getaway or vacation rental. .. .the vast options are up to you!

FLKMLS #413066

Jun 21, 1999

Sold

$387,500

$245/sq ft

Jan 14, 1999

Listed

$400,000

$253/sq ft

Public Records

Apr 1, 1984

Sold

$40,000

$25/sq ft

Tax history for 520 12Th St

*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

8,250 Sq. Ft.

Year renovated

2005

Sq. Ft.

1,584

Year built

1985

Style

Single Family Residential

County

Monroe County

APN

0566 33 00077500000000

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, Covered Parking

Interior

Interior Features
Interior Features: Built-in Cabinets, Quartz Countertops, Bar, Window Treatments, Storage, Security System
Flooring: Tile Floor, Laminate
Windows/Doors: Other Windows/Doors, Impact Rstnce Window, Impact Rstnce Doors
Cooling/Heating: Central A/C, Ceiling Fans
Appliances: Washer, Disposal, Microwave, Range, Refrigerator, Dishwasher, Dryer
Furnished: Furniture Negotiable

Bathroom Information
# of Full Baths: 2

Specialty Room Information
Specialty Rooms: Workshop

Exterior

Boat Slip/Dock Information
Dockage: Dock Length: 75
Dockage: Dock: Concrete

Exterior Features
Exterior Features: Bar, Water Display, Storage, Outdoor Shower, Landscape Lighting
Has Pool
Pool Information: In Ground, Fiberglass
Porch/Balcony: Open Porch/Balcony, Patio

Security
Other Security

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

Property Information
Property Condition: Updated/Remodeled
Deed Restrictions: Unknown
Pets: Pets Allowed
Rentals Allowed: Yes
Min Rental Days: 7

Lot Information
Acres: 0.19
Zoning: R-1A - Key Colony Single Family
Land Size: Less Than 1/4 Acre
Control Depth: 4
Flood Zone: AE

Building Information
Year Built: 1,985
Sq. Ft. Source: Property Data Card
Sq. Ft. Remarks: * Bonus space not included in SQFT
Building Style: Above Flood: Yes
Building Style: Stilt Column Height: Medium - 5Ft - 9Ft
Construction: CBS
Roof: Metal Roof

Subdivision/Neighborhood
Subdivision: Key Colony Bch 2nd Addn (53.5)
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)

Financial

Tax Information
Taxes: $14,634.65
Tax Year: 2,025
Tax Exemptions: None

Financial Information
Terms: Seller Finance Psble, Conventional, Cash

Utilities

Utility Information
Utilities: FKAA, Elect Separate Meter, Buyer to Verify, Municipal Sewer
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: Overseas Highway to the light at Key Colony. Turn into Key Colony, Take Sadowski Cswy, Turn Right on W Ocean Dr, Turn Right on 12th St.

Neighborhood Features
Tennis Courts, Other Area Features, Fire Hydrant

Public facts

Beds: 2
Baths: 2.0
Sq. Ft.: 1,584
Stories: 2.0
Lot Size: 8,250 square feet
Style: Single Family Residential
Year Built: 1985
Year Renovated: 2005
County: Monroe County
APN: 0566 33 00077500000000

Home facts updated by county records on Jul 10, 2026

Other

Auction Information
Financial Status: Auction: No

Around this home

Schools

K - 12
Preschool & daycare

Stanley Switlik Elementary School

Public PreK-5 • Assigned • 4.4mi

4/10

Marathon School

Public 6-12 • Assigned • 3.5mi

4/10

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

96/ 100

Exceptional sunlight

Sunscore

This home receives average direct sun exposure in Key Colony Beach. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

9 hrs

7.1 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.14M – $2.59M

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

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New listings for sale in 33051

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Spacious backyard • Patio • Storage

$764,000

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Spacious backyard • Patio • Storage

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Home values near 520 12Th St

Data from public records.

Address	Redfin Estimate
501 12th Street, Key Colony Beach, FL 4 Beds \| 3 Baths \| 4218 Sq. Ft.	$2,469,988
581 12th Street, Key Colony Beach, FL 4 Beds \| 2 Baths \| 1800 Sq. Ft.	—

Address	Redfin Estimate
541 12th Street, Key Colony Beach, FL 3 Beds \| 3 Baths \| 1600 Sq. Ft.	$2,532,582
471 12th Street, Key Colony Beach, FL 2 Beds \| 2.5 Baths \| 2256 Sq. Ft.	$1,782,727

Address	Redfin Estimate
561 12th Street, Key Colony Beach, FL 3 Beds \| 3 Baths \| 1716 Sq. Ft.	$1,925,175
521 12th Street, Key Colony Beach, FL 2 Beds \| 2 Baths \| 1470 Sq. Ft.	$1,650,338

Property information provided by FLKMLS when last listed in 2026. 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 520 12Th St

Tax history for 520 12Th 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 520 12Th St

More real estate resources