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$1,395,000

  • For Sale
  • Active
  • Duplex
  • 2 Beds
  • 3 Full Baths
  • 1,176 Sq. Ft.
  • Updated 6 hours ago

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This exceptional waterfront residence in Key Colony Beach offers the perfect blend of refined comfort, thoughtful design, and effortless island living. Lovingly owned, gently used, and never rented, the home reflects true pride of ownership throughout. An elevator, updated kitchen, and custom baths set the stage, while soaring wood ceilings and an open-concept kitchen, dining, and living area create a light-filled space that flows seamlessly through stackable sliders to a spacious screened porch ideal for entertaining or unwinding in the coastal breeze. The generous primary suite is a private retreat with porch access and a skylit spa-style bath featuring a jetted tub, walk-in tiled shower, and dual vanities. The lower level is designed for true indoor-outdoor living, featuring an custom, inground swimming pool surrounded by elegant marble decking, along with expansive covered and uncovered paved patios. Mature tropical landscaping enhances privacy, while ample covered and uncovered parking adds everyday convenience. Boaters will love the 37.5 foot dock with 15k boat lift, located on a wide, deep canal with quick, easy access, just minutes to both the open ocean and the Gulf via Vaca Cut. A permitted third full bathroom on the lower level sits next to a large air-conditioned storage area with sliders directly to the patio and dock, making it ideal as an angler's room for fishing gear and water toys. Key Colony Beach is one of the Florida Keys most desirable island communities, known for its wide, walkable streets, city-maintained infrastructure, and relaxed coastal charm. Residents enjoy access to marinas, a nine-hole golf course, tennis and pickleball courts, playgrounds, dining, and waterfront Sunset Park all just steps or a short bike ride away. Perfectly positioned in the Middle Keys, Key Colony Beach offers a rare combination of small-town island living, world class boating, and easy access to Marathon's shopping, dining, and local airport.

Full Property Details for 651 9th St

General

  • Price: $1,395,000
  • Taxes: $9,607 (2025)
  • Status: Active
  • Type: Duplex
  • Source: 927
  • MLS ID: 618394
  • Updated: 5/13/2026
  • Added to Site: 103 day(s) ago

Interior

  • Interior Features: Walk-in Closet(s), Built-in Cabinets, Cathedral Ceilings, Dade County Pine, Drapes/Blinds Incl, Elevator, Granite Counter Top, Smoke Alarms, Split Bedroom, Storage, Whirlpool Bath Tub, Window Treatments
  • Appliances: Stainless Steel Appliance(s), Dishwasher, Disposal, Dryer, Microwave, Range, Refrigerator, Washer
  • Flooring: Tile

Rooms

Bathrooms

  • Total Bathrooms: 3
  • Full Bathrooms: 3

Bedrooms

  • Total Bedrooms: 2

Additional Information

  • Shared Amenities: Bike Paths, Beach, Tennis Court(s), Airport/Runway
  • Pool: Yes
  • Pool Description: Heated, In Ground, Decked
  • Security/Safety: Patrolled Area

Exterior

  • Exterior Features: Lighting, Fencing
  • Deck/Patio: Open Porch/Balcony, Screened
  • Porch/Patio/Deck: Open Porch/Balcony, Screened

Parking

  • Parking Features: Guest, Off Street, Covered, Carport

Location

  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • County: Monroe
  • Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5)
  • Driving Directions: Overseas Hwy mile marker 53.5 turn at light onto Sadowski / KCB Causeway Turn right onto W. Ocean Turn right onto 9th Follow down to #651 on left

Community

  • Assoc. Fees Include: None
  • Pets Allowed: Yes

Heating & Cooling

  • Central air: Yes
  • Air Conditioning: Yes
  • Cooling Type: Central Air, Ceiling Fans(s)
  • Heating Type: Central

Structural Information

  • Architectural Style: Above Flood
  • Construction: CBS
  • Roof: Metal
  • Windows/Doors: Single Hung Windows, Sliding Glass Doors, Shutters
  • Square Feet: 1,176
  • Sq. Ft. Source: Property Data Card
  • Year Built: 1989

Lot Features

  • Property View: Canal
  • Lot Size (Acres): 0.1
  • Lot Size (Sq. Ft.): 4,125
  • Lot Size Source: Property Data Card
  • Lot Dimensions: 37.5 x 110
  • Zoning: R-2A - Key Colony Two Family

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front Desc.: Canal Front

Financial Considerations

  • Tax Amount: $9,607.1
  • Tax Year: 2025

Disclosures and Reports

  • Legal Description: BLK 10 N 1/2 LOT 28 KEY COLONY BEACH FIRST ADDN AMENDED PLAT PB4-11 SHELTER KEY
  • Flood Zone: AE
  • APN: 00075730-000000

Listed by Ocean Sotheby's International, Karen D Raspe (305) 393-9010 and Ocean Sotheby's International, Jo Ann Cook (305) 360-7968

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Listing agents

— 651 9th St —

  • Karen D Raspe

    Ocean Sotheby's International

  • Jo Ann Cook

    Ocean Sotheby's International

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 651 9th 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
6-123.7 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 651 9th St Get Price Alerts and Save Property

Date
Details
Price
Change
Source
1/30/2026
Listed
$1,395,000
26.82%
MLS
7/07/2022
Sold
$1,100,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 651 9th St

Year
Property Taxes
Change
Tax Assessment
Change
2025
$9,607
-4%
$972,572
-2%
2024
$9,993
4%
$987,672
5%
2023
$9,599
61%
$943,390
70%
2021
$5,949
-9%
$553,734
-22%
2022
$6,557
10%
$710,742
44%
2021
$5,949
12%
$494,898
-1%
2019
$5,302
14%
$500,585
11%
2018
$4,632
4%
$449,608
1%
2017
$4,468
—
$443,535
1%
2016
$4,486
10%
$441,132
16%
2015
$4,066
—
$380,165
3%
2014
$4,064
7%
$367,776
10%
2013
$3,801
—
$334,342
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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*These costs are estimates, and the interest rates assume exceptional credit standing.

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NMLS#: 1598647

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Listed by Ocean Sotheby's International, Karen D Raspe (305) 393-9010 and Ocean Sotheby's International, Jo Ann Cook (305) 360-7968

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651 9th Street, Key Colony Beach, FL 33051 (MLS# 618394) is a Duplex property with 2 bedrooms and 3 full bathrooms. 651 9th Street is currently listed for $1,395,000 and was received on January 30, 2026. Want to learn more about 651 9th Street? Do you have questions about finding other Duplex real estate for sale in Key Colony Beach? You can browse all Key Colony Beach real estate or contact a Coldwell Banker agent to request more information.

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