1,584 Sq. Ft.
$1,626 / Sq. Ft.
1,584
Sq. Ft.
$1,626
per Sq. Ft.

Description

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

Property Details for 520 12th Street

Waterfront
Canal Front
Waterfront
Yes
Zoning
R-1A - Key Colony Single Family
Subdivision
Key Colony Bch 2nd Addn (53.5)
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.
Vehicle Storage
Garage, Covered Parking
Pets
Pets Allowed
LISTING UPDATED: 01/23/2026 08:46 AM

Property Details for 520 12th Street

StatusActive
MLS #618093
Days on Market10
Taxes$14,635 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential / Single Family
Year Built1985
Lot Size0.19 AC / 8,250 SF
CountyMonroe County

Location

Listing Courtesy of Florida Keys Real Estate Group
Add your commute

Building Information for 520 12th Street

Stories-Year Built1985Building Size-Lot Size0.19 AC / 8,250 SF

Payment Calculator

$13,770 per month

30 year fixed, 6.15% Interest

Principal and Interest

$12,550

Property Taxes

$1,220

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 520 12th Street

Summary
Location and General Information
  • Waterview: Canal View
  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • Absolute Longitude: 81.025622
  • Control Depth: 4
  • Listing Board: Marathon/Lower Keys
  • Side: Ocean
  • Mile Marker: 53.5
  • Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
  • Neighborhood Feature: Tennis Courts, Other Area Features, Fire Hydrant
  • Key/Island: Key Colony
Taxes and HOA Information
  • Association Info: Mandatory Home Owners Asc: No
  • Association Info: 1st Right of Refusal: No
  • Fee Includes: None
  • Furnished: Negotiable
  • Tax Year: 2025
  • Tax Exemptions: None
Property
Lot Information
  • Acres: 0.19
  • SqFt Remarks: *Bonus space not included in SQFT
  • Parcel #: 00077500-000000
  • Land Size: Less Than 1/4 Acre
Property and Assessments
  • Legal: BK 12 N 62.5 FT LT 55 AND S 12.5 FT LT 54 KEY COLONY BEACH SECOND ADDN SHELTER KEY
  • MLS Approved: Y
  • Bank Owned: No
  • SqFt Source: Property Data Card
  • Flood Zone: AE
  • Rentals Allowed: Yes
  • Deed Restrictions: Unknown
  • Picture Count: 25
  • Document Count: 0
  • Building Style: Above Flood: Yes
  • Building Style: Stilt Column Height: Medium - 5Ft - 9Ft
  • Property Condition: Updated/Remodeled
  • Security: Other
  • Title: Negotiable
Utilities
  • Utilities: FKAA, Elect Separate Meter, Buyer to Verify, Municipal Sewer
  • Pub Sewer HkUp: Yes
  • Species List: No
  • Pool: Yes
  • Pool Info: In Ground, Fiberglass
  • Porch/Balcony: Open Porch/Balcony, Patio
Interior and Exterior Features
Interior Features
  • Floor: Tile, Laminate
  • Interior Features: Built-in Cabinets, Quartz Countertops, Bar, Window Treatments, Storage, Security System
  • Appliances: Washer, Disposal, Microwave, Range, Refrigerator, Dishwasher, Dryer
Exterior Features
  • Roof: Metal Roof
  • Dockage: Dock Length: 75
  • Dockage: Dock: Concrete
  • Construction: CBS
  • Exterior Features: Bar, Water Display, Storage, Outdoor Shower, Lighting
  • Windows/Doors: Other Windows/Doors, Impact Rstnce Window, Impact Rstnce Doors
Room Information
  • Specialty Rooms: Workshop

Property History for 520 12th Street

DateEvent & SourcePriceAppreciation
Jan 13, 2026

Price Change

FKMLS #618093

$2,675,000
Jan 13, 2026

Listed (Active)

FKMLS #618093

$2,575,000
Dec 18, 2024

Sold (Public Record)

Public Record #1547903774

$1,700,000
Dec 18, 2024

Sold

FKMLS #612403

$1,700,000
Nov 29, 2024

Pending

FKMLS #612403

Nov 29, 2024

Backup Contract

FKMLS #612403

Nov 23, 2024

Listed (Active)

FKMLS #612403

$1,764,999
Jun 21, 1999

Sold

FKMLS #413066

$387,500
Jan 14, 1999

Listed (Active)

FKMLS #413066

$400,000
DateEvent & SourcePrice
01/13/2026

Price Change

FKMLS #618093

$2,675,000
01/13/2026

Listed (Active)

FKMLS #618093

$2,575,000
12/18/2024

Sold (Public Record)

Public Record #1547903774

$1,700,000
12/18/2024

Sold

FKMLS #612403

$1,700,000
11/29/2024

Pending

FKMLS #612403

11/29/2024

Backup Contract

FKMLS #612403

11/23/2024

Listed (Active)

FKMLS #612403

$1,764,999
06/21/1999

Sold

FKMLS #413066

$387,500
01/14/1999

Listed (Active)

FKMLS #413066

$400,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 520 12th Street

Taxable ValueLand$907,500Additions$611,399Total$1,518,899
Tax Record2024$6,119 ($510 / month)
Home Facts
Beds2Baths2Total Finished SqFt1,584 SqFtAbove Grade Finished SqFt1,584 SqFtStories2Lot Size8,250 SqFtStyleSingle Family ResidenceYear Built1985Year Renovated2005CountyMONROEAPN00077500-000000

Schools near 520 12th Street

This home is within Monroe.
Rating
School
Type
Grades
Distance
Public - PK to 5
Public - 6 to 12
Public - 9 to 12
Charter - PK to 5
Rating
School
Distance
Stanley Switlik Elementary School
PublicPK to 5

Marathon School
Public6 to 12

Coral Shores High School
Public9 to 12

Big Pine Academy
CharterPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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520 12th Street is a single family home for sale in Key Colony Beach, FL 33051. This property was listed for sale on January 13, 2026 by Florida Keys Real Estate Group, it's currently listed at $2,575,000. It has been on the market for a total of 10 days and was last sold on December 18, 2024. This listing's school district is Monroe. Nearby schools include Stanley Switlik Elementary School, Marathon School and Coral Shores High School. 520 12th Street is a 3-bed, 2-bath, 1,584 sqft single family home built in 1985.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of Florida Keys Real Estate Group

Based on information from one of the following Multiple Listing Services: Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS®. Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.