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$1,120,000

  • Sold
  • Closed
  • Duplex
  • 1,830 Sq. Ft.
See This Home
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Spacious 4 bed, 4 bath half duplex in the heart of Key Colony Beach. Built in 1994 with over 1,800 sq ft of living space, perfect for full-time living, vacation rental, or investment. Enjoy 37.5 ft of canal frontage with private dock-ideal for boating. Open living area, covered parking, storage, and lush tropical landscaping. Located in a resort-style community with parks, restaurants, golf course, and beach access. Strong rental potential in one of the most desirable neighborhoods in the Florida Keys.

Full Property Details for 521 8th St

General

  • Sold For: $1,120,000
  • Taxes: $9,354 (2024)
  • Status: Closed
  • Type: Duplex
  • Source: Greater_Miami
  • MLS ID: A11797921
  • Added to Site: 255 day(s) ago

Rental Information

  • Rent Includes: Trash Collection

Interior

  • Flooring: Carpet, Terrazzo, Tile

Exterior

  • Exterior Features: Balcony, Exterior Lights, Tennis Court(s)

Parking

  • Total Spaces: 4

Location

  • Area: Key Colony Beach 1st Add
  • County: Monroe County
  • Subdivision: KEY COLONY BEACH 1ST ADD
  • Building Name: KEY COLONY BEACH 1ST ADD

Community

  • Community Name: Key Colony Beach 1st Add
  • Units Assoc/Comm: 1

Heating & Cooling

  • Air Conditioning: Yes
  • Cooling Type: Central Air, Electric
  • Heating Type: Electric

Utilities

  • Sewer: Public Sewer

Structural Information

  • Architectural Style: Attached
  • Structure Type: Duplex
  • Detached/Attached: Detached
  • Construction: CBS Construction, Elevated Construction
  • Roof: Barrel Roof, Curved/S-Tile Roof
  • Windows: Hurricane Shutters
  • Stories/Levels: 2
  • Building Size: 3893
  • Square Feet: 1,830
  • Living Area: 1,830 Sq. Ft.
  • Year Built: 1994

Unit Information

  • Units in Complex: 1

Lot Features

  • Frontage Feet: 37
  • Lot Features: Less Than 1/4 Acre Lot
  • Potential Use: Unknown/Withheld
  • Zoning: Duplex

Water Features

  • Water Front: Yes
  • Water Front Desc.: Canal Front, Canal Width 81-120 Feet, Ocean Access

Financial Considerations

  • Price Per Sq. Ft.: $612.02
  • Tax Amount: $9,354
  • Tax Year: 2024
  • Terms: All Cash, Conventional, VA Loan

Disclosures and Reports

  • Documents Avail.: Appraisal, Other Available Information
  • Legal Description: S 1/2 LOT 22 BK 9 KEY COLONY BEACH FIRST ADDN AMD PLAT PB4-11 SHELTER KEY OR417-586 OR863-1397 OR868-1820AFF SPLIT PER SURVEY-OWNER REQ 2-3-
  • Inclusions: Private Dock, Unrestricted Salt Water Access, Beach Access, Dock Owned/Included, Private Dock, UP to 40 Ft Boat, Up to 50 Ft Boat, Up to 60 Ft Boat
  • Property ID: 00075000-000000

Listed by Move Miami, LLC.
Sold by Avanti Way Realty LLC

Listing agent

— 521 8th St —

  • Move Miami, LLC.

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NMLS#: 1598647

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Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Schools serving 521 8th St

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Stanley Switlik Elementary School
3400 Overseas Highway, Marathon, FL 33050
PK-54.6 mi
Marathon School
350 Sombrero Beach Road, Marathon, FL 33050
6-123.8 mi
Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 521 8th St

Date
Details
Price
Change
Source
7/22/2025
Sold
$1,120,000
-10.33%
MLS
5/20/2025
Price Increased
$1,249,000
24.9%
MLS
5/06/2025
Listed
$999,999
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Listed by Move Miami, LLC.
Sold by Avanti Way Realty LLC

Recent Sales near 521 8th St

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11284 3rd Ave Ocean Ave, Marathon, FL 33050 - Photo 1 Sold
$1,100,000

11284 3rd Ave Ocean Ave  Marathon, FL 33050

  • Single Family
  • Closed
  • 3
    Beds
  • 2
    Total Baths
  • 1,152
    Sq. Ft.
Listed by Cypress Realty, Inc., Shane Murray Wilson
Sold by Non Res Member, Non Res Agent
11280 1st Ave, Marathon, FL 33050 - Photo 1 Sold
$982,000

11280 1st Ave  Marathon, FL 33050

  • Single Family
  • Closed
  • 3
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  • 1,842
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1190 91st Ct Ocean, Marathon, FL 33050 - Photo 1 Sold
$1,100,000

1190 91st Ct Ocean  Marathon, FL 33050

  • Single Family
  • Closed
  • 3
    Beds
  • 2
    Total Baths
  • 1,056
    Sq. Ft.
1190 91st St Ocean, Marathon, FL 33050 - Photo 1 Sold
$1,100,000

1190 91st St Ocean  Marathon, FL 33050

  • Single Family
  • Closed
  • 3
    Beds
  • 2
    Total Baths
  • 1,056
    Sq. Ft.
Listed and Sold by La Costa Homes Realty, Maria Nazur

521 8th St, Key Colony, FL 33051 (MLS# A11797921) is a Duplex property that was sold at $1,120,000 on July 22, 2025. Want to learn more about 521 8th St? Do you have questions about finding other Duplex real estate for sale in Key Colony? You can browse all Key Colony real estate or contact a Coldwell Banker agent to request more information.