321 & 331 9th Street, Key Colony, FL 33051

New Listing

$3,200,000

Virtual Tour

https://www.zillow.com/view-imx/ef4bb6b6-8cdc-4850-a5e8-e3ae89a8a406?setAttribution=mls&wl=true&initialViewType=pano&utm_source=dashboard

Property Type: Residential Bedrooms: 4 Baths: 6 Square Footage: 3,080 Lot Size (sq. ft.): 8,250 Status: Active

Current Price: $3,200,000 List Date: 8/20/2026 Last Modified: 8/20/2026

Overview

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 comp ... (Read more)

Listing Details MLS# 621036

Location, Tax & Legal

Street #: 321 & 331
Street Name: 9th
Street Suffix: Street
Key/Island: Key Colony
State/Province: FL
Zip Code: 33051
County: Monroe
Subdivision: Key Colony Beach (53.5)
Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
City: KEY COLONY
Mile Marker: 53.5
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
Side: Ocean
Alternate Key #: 1081116
Add'l Parcel #1: 00075560-000100
Parcel #: 00075560-000000
Zoning: R-2A - Key Colony Two Family
Deed Restrictions: Unknown
Legal: KEY COLONY BEACH FIRST ADD AMENDED PLAT PB4-11 SHELTER KEY and N 1/2 LOT 12 BLK 10
Taxes: 13968.6
Tax Year: 2025
Pub Sewer HkUp: Yes

Contract Information

Listing Board: Marathon/Lower Keys
As is Rght to Inspct: Yes
Potential Short Sale: No
Bank Owned: No

General Property Description

Realtor.COM Type: Residential - Single Family
Style: Duplex
Waterfront: Yes
Control Depth: 4
Pool: Yes
Year Built: 1988
Total Units: 2
Lot SqFt: 8250
Lot Sqft Source: Property Data Card
Living Apx SqFt: 3080
SqFt Source: Property Data Card
Total Bedrooms: 4
Full Baths: 4
Half Baths: 2
Total Baths: 6
Rentals Allowed: Yes
Min Rental Days: 7

Association Info

Mandatory Home Owners Asc: No
1st Right of Refusal: No
Association Fee $: 0

License Info

# of City License: 2

More Information

Dockage

Dock Length: 75
Dock: Composite
Seawall: Concrete
Boat Lift: Yes

Building Style

Above Flood: Yes

Financial Status

Auction: No
Bank Owned: No
Potential Short Sale: No
Standard Sale: Yes

Remarks & Misc

Remarks – Consumer: 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.

Fee Includes

None: Yes

Tax Exemptions

Disability: Yes
Homestead: Yes

Appliances

Dishwasher: Yes
Dryer: Yes
Microwave: Yes
Oven: Yes
Refrigerator: Yes
Stainless Steel Appliance(s): Yes
Washer: Yes

Pets

Pets Allowed: Yes

Cooling

Central Air: Yes

Waterfront

Canal Front: Yes

Waterview

Canal View: Yes

Floor

Laminate: Yes
Tile: Yes

Neighborhood Feature

Bike Paths: Yes
Tennis Courts: Yes

Interior Features

Smoke Alarms: Yes

Property Condition

Updated/Remodeled: Yes

Specialty Rooms

Sun/Florida Room: Yes

Windows/Doors

Impact Rstnce Doors: Yes
Impact Rstnce Window: Yes

Vehicle Storage

Garage: Yes
RV Parking Open: Yes
Trailer Storage: Yes

Security

Patrolled Area: Yes

Construction

CBS: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Furnished: Yes

Terms

Cash: Yes
Conventional: Yes
FHA: Yes
No Seller Finance: Yes

Utilities

Buyer to Verify: Yes
Cable Available: Yes
Elect Separate Meter: Yes
FKAA: Yes
Water Separate Meter: Yes

Title

Title Ins - Buyer: Yes

Exterior Features

Storage: Yes

Pool Info

In Ground: Yes
Fiberglass: Yes
Decked: Yes

Pre-Wired

Cable: Yes

Roof

Metal Roof: Yes

Property Features

Fee Includes: None Tax Exemptions: Disability; Homestead Waterfront: Canal Front Waterview: Canal View Dockage: Boat Lift Property Condition: Updated/Remodeled Vehicle Storage: Garage; RV Parking Open; Trailer Storage Furnished: Furnished Cooling: Central Air Utilities: Buyer to Verify; Cable Available; Elect Separate Meter; FKAA; Water Separate Meter Interior Features: Smoke Alarms Pre-Wired: Cable Specialty Rooms: Sun/Florida Room Appliances: Dishwasher; Dryer; Microwave; Oven; Refrigerator; Stainless Steel Appliance(s); Washer Exterior Features: Storage Pool Info: In Ground; Fiberglass; Decked Construction: CBS Floor: Laminate; Tile Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Bike Paths; Tennis Courts Security: Patrolled Area Land Size: Less Than 1/4 Acre Terms: Cash; Conventional; FHA; No Seller Finance Title: Title Ins - Buyer

Listing Office: LPT Realty, LLC

Last Updated: August - 20 - 2026

The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.

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