640 9th St

Key Colony Beach, FL 33051

$1,400,000
Price
3
Beds
1,596 Sq. Ft.
$877 / Sq. Ft.
1,596
Sq. Ft.
$877
per Sq. Ft.
a view of a house with swimming pool and sitting area
a view of a house with a yard
a view of a swimming pool with a lake view
a living room with furniture a rug and a flat screen tv
a view of a dining room and livingroom view
a kitchen with stainless steel appliances granite countertop a sink and a stove
a bedroom with a bed and a painting on the wall
a bathroom with a sink vanity granite and a mirror
a view of a chairs and table on the terrace
a view of a house with a patio
an aerial view of ocean and residential houses with outdoor space
an aerial view of a city with ocean view
an aerial view of a house with a yard and lake view
an aerial view of a house with swimming pool
a view of entryway and hall
a view of a house with backyard and deck
a lake view with a garden
a view of swimming pool with seating area and barbeque oven
a aerial view of a house with swimming pool lawn chairs and a yard
a view of a patio with a dining table and chairs
a view of a chairs and table in patio with a lake view
a view of a lake with a table and a chairs
a living room with furniture and a large window
a living room with furniture a flat screen tv and a floor to ceiling window
a view of a dining room with furniture
a kitchen with a sink cabinets and window
a kitchen with stainless steel appliances a sink stove and refrigerator
a view of a dining room with furniture and chandelier
a bedroom with a bed and a mirror
a bedroom with a bed and a window
a bedroom with a bed and a flat screen tv
a bathroom with a sink a toilet and a mirror
a view of a hallway with washer and dryer
a view of a entryway
a living room with furniture and a flat screen tv
a bedroom with a bed and a television
640 9th Street
a bathroom with a granite countertop sink toilet and shower
a outdoor space with furniture
640 9th Street
640 9th Street
a view of an empty room with a balcony
a living room with furniture and a flat screen tv
a living room with furniture a flat screen tv and a large window
a living room with furniture and a flat screen tv
a bathroom with a sink toilet and shower
640 9th Street
a view of a room with gym equipment
a view of a lake with houses with outdoor space
640 9th Street
a view of a house with a yard and plants
a view of a house with backyard porch and sitting area
an aerial view of residential houses with outdoor space
640 9th Street
640 9th Street
an aerial view of a city with lots of residential buildings
a view of a lake with a big yard
Pickleball Courts
Par 3 Golf
a view of swimming pool with a yard
a view of a house with potted plants and a bench
Golf
a view of yard with swimming pool
a view of a yard with a tree
Plaground 2
a swimming pool with outdoor seating and yard
Sunset Park
a view of ocean with boats and trees in the background
KCB The GEM of the FL Keys
a picture of a floor plan

Description

Welcome to this inviting east facing, waterfront, stilted half duplex in Key Colony Beach, offering three bedrooms, four bathrooms, and nearly 1,600 square feet of interior living space. With 37.5 feet of concrete seawall, step down wooden dock with concrete pilings, heated and chilled pool, and a spacious concrete patio for lounging and entertaining, this property is perfectly designed for the Keys lifestyle. Peace of mind features include metal roof, Hardie board siding, recently upgraded impact...Welcome to this inviting east facing, waterfront, stilted half duplex in Key Colony Beach, offering three bedrooms, four bathrooms, and nearly 1,600 square feet of interior living space. With 37.5 feet of concrete seawall, step down wooden dock with concrete pilings, heated and chilled pool, and a spacious concrete patio for lounging and entertaining, this property is perfectly designed for the Keys lifestyle. Peace of mind features include metal roof, Hardie board siding, recently upgraded impact windows and doors, and a 2020 AC. A generous carport and driveway provide ample parking, along with a downstairs enclosure that features a full convenience bathroom, air conditioned cabana room, and a one car garage for storage of toys and gear. Saltillo tile flows throughout the first level, where you will find an open concept great room with soaring ceilings that connect the kitchen, dining, and living areas. Enjoy indoor to outdoor living from the large covered second floor patio ideal for al fresco meals, morning coffee, or watching stunning sunrises over the canal. The newly renovated primary bathroom showcases a spacious step-in tiled shower, quartz topped vanity, and elegant gold finishes. A comfortable guest bedroom and bathroom are conveniently located on the same level, with laundry in the hallway closet. Upstairs, the loft offers a third bedroom and full bathroom with plank flooring, creating a private retreat for guests or family. Your Key Colony Beach haven awaits. The City of Key Colony Beach offers its own police department, City Hall, tennis and pickleball courts, dog park, nine hole par three golf course, two playgrounds, and two new restaurants opening soon. Enjoy the walkable island lifestyle and the best of coastal living here!
  1. Listed by Karen D Raspe, PA • Ocean Sotheby's International
  2. Listed by Ally Kelley • Ocean Sotheby's International

Property Details for 640 9th Street

Waterfront
Canal Front
Waterfront
Yes
Zoning
R-2A - Key Colony Two Family
Subdivision
Key Colony Beach (53.5)
Directions
From US-1, turn at light onto Sadowski / KCB Causeway. Turn right onto W Ocean Dr. Turn right onto 9th Street & follow to 640 9th toward the end.
Vehicle Storage
Garage, RV Parking Open, Covered Parking, Trailer Storage, Open Parking, Attached, Carport
Pets
Pets Allowed
LISTING UPDATED: 12/12/2025 04:20 PM

Property Details for 640 9th Street

StatusActive
MLS #617620
Days on Market19
Taxes$8,412 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeUnit Duplex
MLS TypeResidential / Half Duplex
Year Built1988
Lot Size0.09 AC / 4,125 SF
CountyMonroe County

Location

Listing Courtesy of Ocean Sotheby's International
Add your commute

Building Information for 640 9th Street

Stories-Residences-Year Built1988Lot Size0.09 AC / 4,125 SF

Payment Calculator

$7,619 per month

30 year fixed, 6.28% Interest

Principal and Interest

$6,918

Property Taxes

$701

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 640 9th Street

Summary
Location and General Information
  • Waterview: Canal View
  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • Absolute Longitude: 81.022785
  • Control Depth: 5
  • Off Shore Island: No
  • Listing Board: Marathon/Lower Keys
  • Side: Ocean
  • Mile Marker: 53.5
  • Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
  • Neighborhood Feature: Community Boat Ramp, Bike Paths, Airstrip, Beach, Tennis Courts
  • 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: Furnished
  • Tax Year: 2025
  • Tax Exemptions: None
Property
Lot Information
  • Lot Size: 37.5 X 110
  • Acres: 0.09
  • Parcel #: 00075170-000100
  • Land Size: Less Than 1/4 Acre
Property and Assessments
  • Legal: BK 9 SLY 1/2 LOT 39 KEY COLONY BEACH FIRST ADDN AMD PLAT PB4-11 SHELTER KEY
  • MLS Approved: Y
  • SqFt Source: Property Data Card
  • Flood Zone: AE
  • Rentals Allowed: Yes
  • Deed Restrictions: Unknown
  • Picture Count: 73
  • Document Count: 0
  • Building Style: Above Flood: Yes
  • Building Style: Stilt Column Height: Medium - 5Ft - 9Ft
  • Property Condition: Updated/Remodeled
  • Security: Patrolled Area
  • Title: Title Ins - Buyer
Utilities
  • Utilities: FKAA, Cable Available, Buyer to Verify, Community Swr Plant
  • Pub Sewer HkUp: Yes
  • Species List: No
  • Pool: Yes
  • Pool Info: In Ground, Decked, Concrete
  • Porch/Balcony: Open Porch/Balcony, Patio
Interior and Exterior Features
Interior Features
  • Floor: Tile
  • Interior Features: Cathedral Ceilings, Granite Counter Top, Storage, Smoke Alarms
  • Pre-Wired: Cable
  • Appliances: Washer, Stainless Steel Appliance(s), Microwave, Range, Refrigerator, Dishwasher, Dryer
Exterior Features
  • Roof: Metal Roof
  • Shutters: Accordion
  • Dockage: Dock Length: 375
  • Dockage: Dock: Wood
  • Dockage: Seawall: Concrete
  • Construction: CBS
  • Exterior Features: Privacy Wall/Fence
  • Windows/Doors: Sliding Glass Doors, Impact Rstnce Window, Other Windows/Doors

Property History for 640 9th Street

DateEvent & SourcePriceAppreciation
Dec 6, 2025

Listed (Active)

FKMLS #617620

$1,400,000—
Jun 10, 2022

Sold

FKMLS #600605

$1,352,000—
Jun 7, 2022

Sold (Public Record)

Public Record #1492521570

$1,352,000

+30.2% / yr

May 4, 2022

Backup Contract

FKMLS #600605

—
Apr 18, 2022

Pending

FKMLS #600605

—
Apr 15, 2022

Listed (Active)

FKMLS #600605

$1,352,000—
Feb 14, 2020

Sold (Public Record)

Public Record #664824107

$735,000

+8.2% / yr

Jun 17, 2016

Sold (Public Record)

Public Record #575066939

$550,000—
Jun 17, 2016

Sold

FKMLS #568932

$550,000—
May 12, 2016

Pending

FKMLS #568932

—
Nov 11, 2015

Listed (Active)

FKMLS #568932

$598,000—
Apr 15, 1999

Sold

FKMLS #408899

$290,000—
Jan 23, 1998

Listed (Active)

FKMLS #408899

$290,000—
DateEvent & SourcePrice
12/06/2025

Listed (Active)

FKMLS #617620

$1,400,000
06/10/2022

Sold

FKMLS #600605

$1,352,000
06/07/2022

Sold (Public Record)

Public Record #1492521570

$1,352,000

+30.2% / yr

05/04/2022

Backup Contract

FKMLS #600605

—
04/18/2022

Pending

FKMLS #600605

—
04/15/2022

Listed (Active)

FKMLS #600605

$1,352,000
02/14/2020

Sold (Public Record)

Public Record #664824107

$735,000

+8.2% / yr

06/17/2016

Sold (Public Record)

Public Record #575066939

$550,000
06/17/2016

Sold

FKMLS #568932

$550,000
05/12/2016

Pending

FKMLS #568932

—
11/11/2015

Listed (Active)

FKMLS #568932

$598,000
04/15/1999

Sold

FKMLS #408899

$290,000
01/23/1998

Listed (Active)

FKMLS #408899

$290,000

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

Public Records for 640 9th Street

Taxable ValueLand$486,750Additions$393,977Total$880,727
Tax Record2024$8,972 ($748 / month)
Home Facts
Beds3Baths3Total Finished SqFt1,596 SqFtAbove Grade Finished SqFt1,596 SqFtStories3Lot Size4,125 SqFtStyleSingle Family ResidenceYear Built1988Year Renovated2008CountyMONROEAPN00075170-000100

Schools near 640 9th Street

This home is within Monroe.
Rating
School
Type
Grades
Distance
Stanley Switlik Elementary School
Public - PK to 5
Marathon School
Public - 6 to 12
Coral Shores High School
Public - 9 to 12
Big Pine Academy
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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More information about 640 9th Street, Key Colony Beach, FL 33051

640 9th Street is for sale in Key Colony Beach, FL 33051. This property was listed for sale on December 6, 2025 by Ocean Sotheby's International, it's currently listed at $1,400,000. It has been on the market for a total of 19 days and was last sold on June 10, 2022. This listing's school district is Monroe. Nearby schools include Stanley Switlik Elementary School, Marathon School and Coral Shores High School. 640 9th Street is a 3-bed, 4-bath, 1,596 sqft built in 1988.

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 Ocean Sotheby's International

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.