Date
Details
Price
Change
Source
8/20/2026
Listed
$3,200,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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1/84
$3,200,000 Just Listed
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Property Description
Turn-Key Duplex on a Wide, Deep Canal - Key Colony Beach Welcome to one of the most sought-after settings in the Florida Keys -Key Colony Beach -- a private, tucked-away island community known for its quiet streets, boater-friendly waterways, and true Keys lifestyle. This full duplex sits on a impressively wide, clean, deep canal (100 ft across), offering easy access for boats of all sizes and some of the best water views in the neighborhood. Each side of the duplex mirrors the other in quality and layout: upstairs you'll find 2 spacious bedrooms and 2 full baths, while downstairs offers a convenient pool bath plus a bonus game room/flex space with extra storage -- perfect for kayaks, fishing gear, or beach toys. Both units have been tastefully updated and fully furnished, right down to the dishes, pots, pans, and bedding. Just bring your suitcase. This property is as flexible as it is beautiful. Rent both sides for strong dual-income potential, create the ultimate family compound with room for everyone, or live in one side while renting the other for built-in income. However you use it, you're getting two turn-key homes in one of the safest, most tranquil pockets of the Florida Keys. Located just minutes from open water, world-class fishing, and the laid-back charm Key Colony Beach is known for -- this is Keys living at its most effortless. Two homes. One incredible canal. Endless possibilities. SELLING ONLY AS DUPLEX - will not split them Contact Dawn McComish, P.A. -- The Singing Realtor® -- for a private showing.
Full Property Details
Full Property Details for 321 & 331 9th St
General
- Price: $3,200,000
- Taxes: $13,968 (2025)
- Status: Active
- Type: Duplex
- Source: 927
- MLS ID: 621036
- Updated: 8/20/2026
- Added to Site: 2 day(s) ago
Interior
- Interior Features: Smoke Alarms, Sun/Florida Room
- Appliances: Stainless Steel Appliance(s), Dishwasher, Dryer, Microwave, Oven, Refrigerator, Washer
- Flooring: Tile, Laminate
Rooms
Bathrooms
- Total Bathrooms: 6
- Full Bathrooms: 4
- Half Bathrooms: 2
Bedrooms
- Total Bedrooms: 4
Additional Information
- Shared Amenities: Bike Paths, Tennis Court(s)
- Pool: Yes
- Pool Description: In Ground, Fiberglass, Decked
- Security/Safety: Patrolled Area
Exterior
- Exterior Features: Storage
Parking
- Garage: Yes
Location
- Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
- County: Monroe
- Subdivision: Key Colony Beach (53.5)
Community
- Assoc. Fees Include: None
- Pets Allowed: Yes
Heating & Cooling
- Central air: Yes
- Air Conditioning: Yes
- Cooling Type: Central Air
Structural Information
- Architectural Style: Above Flood
- Construction Status: Updated/Remodeled
- Construction: CBS
- Roof: Metal
- Windows/Doors: Impact Rstnce Doors, Impact Rstnce Window
- Square Feet: 3,080
- Sq. Ft. Source: Property Data Card
- Year Built: 1988
- Property Condition: Updated/Remodeled
Unit Information
- Units in Building: 2
Lot Features
- Property View: Canal
- Lot Size (Acres): 0.19
- Lot Size (Sq. Ft.): 8,250
- Lot Size Source: Property Data Card
- Zoning: R-2A - Key Colony Two Family
Water Features
- Water Front: Yes
- Water View: Yes
- Water Front Desc.: Canal Front
Financial Considerations
- Tax Amount: $13,968.6
- Tax Year: 2025
Disclosures and Reports
- Legal Description: KEY COLONY BEACH FIRST ADD AMENDED PLAT PB4-11 SHELTER KEY and N 1/2 LOT 12 BLK 10
- APN: 00075560-000000
Listed by LPT Realty, LLC, Dawn M McComish (305) 395-3300
We Value Your Privacy
We Value Your Privacy
We Value Your Privacy
Listing agent
— 321 & 331 9th St —
Dawn M McComish
LPT Realty, LLC
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 321 & 331 9th St
School District:Monroe County School District, Middle Torch Key, FL
| Name | Grades | Distance |
|---|---|---|
Stanley Switlik Elementary School 3400 Overseas Highway, Marathon, FL 33050 | PK-5 | 4.6 mi |
Marathon School 350 Sombrero Beach Road, Marathon, FL 33050 | 6-12 | 3.7 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 321 & 331 9th St
Estimate the Cost
Estimate the Cost for 321 & 331 9th St
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- Single Family
- Active
- Updated 3 days ago
- 3Beds
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- 1,623Sq. Ft.
- Single Family
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- Single Family
- Active
- Updated 1 day ago
- 2Beds
- 2Total Baths
- 1,170Sq. Ft.
- Single Family
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- Townhouse
- Active
- Updated 5 days ago
- 3Beds
- 3Total Baths
- 1,488Sq. Ft.
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321 & 331 9th Street, Key Colony, FL 33051 (MLS# 621036) is a Duplex property with 4 bedrooms, 4 full bathrooms and 2 partial bathrooms. 321 & 331 9th Street is currently listed for $3,200,000 and was received on August 20, 2026. Want to learn more about 321 & 331 9th Street? 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.