330-340 4th Street, Key Colony, FL 33051

$1,899,000

Virtual Tour

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Property Type: Residential Bedrooms: 3 Baths: 4 Square Footage: 2,540 Lot Size (sq. ft.): 6,600 Status: Active

Current Price: $1,899,000 List Date: 4/04/2026 Last Modified: 4/13/2026

Description

WATERFRONT BEAUTIFULLY RENOVATED DUPLEX 330-340, 2BR 2BA Upper Level, 1BR 1.5BA Lower Level, both with Full Kitchens, in Key Colony Beach, a NO HOA Municipality, on Marathon Island MM53. New 15K lbs. Boat Lift 2022, 60 Ft Deep Water Dock, Extra Wide Canal, Multiple Electrical Outlets, 3 Fresh Water Spigots. House is equipped with Surge Protection, and a Transfer Switch for a portable generator. Exterior Motion Lights equipped with Security Cameras. EXCELLENT RENTAL INCOME OPPORTUNITY, 7 Day Rentals allowed. Rent the Upper and Lower units to separate parties at the same time, and or live in one and rent the other unit. Beautiful New Pool Heated-Chilled 2022, with a Saltwater system that uses a salt generator, offering lower maintenance, softer water, and reduced skin-eye irritation. New Pool-Cool Deck concrete patio in 2022, that reduces surface temperatures. Outdoor Shower. Metal Roof 2013. Hurricane Accordion and Metal Bahama Shutters in 2021. Upgraded Electrical system in 2022. Upgraded Flooring, Doors, and Windows. Mini-Split AC unit 2021. Upper Level Covered Balcony, beautiful views of the new Sparkling Pool and Boat Dock-Canal. Ample Storage, 3 large outdoor access rooms, and a shed. Excellent Parking, 12 Cars, RV, and Boat-Trailer storage. Ocean side, minutes to World Class Fishing-Diving in the Gulfstream, Coffins Patch Reef, and Sombrero Reef Lighthouse. Easy Bayside access via Vaca Cut in minutes. Join the Cabana Club, steps away, for beach access and excellent dining. Key Colony Beach amenities includes: Golf Course 9 Hole Par 3, Tennis and Pickle Ball Courts, Basketball, Bocce Ball, Corn Hole, Horseshoes. Enjoy the Parks, Playgrounds, Walking and Bike pathways. Key Colony Beach, Paradise Awaits!

More Information MLS# 619361

Contract Information

Listing Board: Florida Keys Current Price: $1,899,000 Listing Date: 2026-04-04 List Price: $1,899,000

Location, Tax & Legal

City: KEY COLONY Mile Marker: 53.5 Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca) Side: Ocean Flood Zone: AE Alternate Key #: 1077062 Parcel #: 00072990-000000 Zoning: R-2A - Key Colony Two Family Deed Restrictions: No Legal: BK 3 LT 33 KEY COLONY BEACH PB3-120 SHELTER KEY OR380-643 OR455-607 OR687-619 OR1098-2040 OR1098-2046 1098-2047 OR1285-1 Taxes: 10604.95 Tax Year: 2025 Pub Sewer HkUp: Yes Street #: 330-340 Street Name: 4th 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

General Property Description

Realtor.COM Type: Multi-family Waterfront: Yes Control Depth: 4 Lot Size: 60 X 110 Lot SqFt: 6600 Pool: Yes Total Units: 0 Acres: 0.15 SqFt Source: Tax Records Rentals Allowed: Yes Style: Duplex Year Built: 1971 Living Apx SqFt: 2540 Total Bedrooms: 3 Full Baths: 3 Half Baths: 1 Total Baths: 4

Remarks & Misc

Remarks – Consumer: WATERFRONT BEAUTIFULLY RENOVATED DUPLEX 330-340, 2BR 2BA Upper Level, 1BR 1.5BA Lower Level, both with Full Kitchens, in Key Colony Beach, a NO HOA Municipality, on Marathon Island MM53. New 15K lbs. Boat Lift 2022, 60 Ft Deep Water Dock, Extra Wide Canal, Multiple Electrical Outlets, 3 Fresh Water Spigots. House is equipped with Surge Protection, and a Transfer Switch for a portable generator. Exterior Motion Lights equipped with Security Cameras. EXCELLENT RENTAL INCOME OPPORTUNITY, 7 Day Rentals allowed. Rent the Upper and Lower units to separate parties at the same time, and or live in one and rent the other unit. Beautiful New Pool Heated-Chilled 2022, with a Saltwater system that uses a salt generator, offering lower maintenance, softer water, and reduced skin-eye irritation. New Pool-Cool Deck concrete patio in 2022, that reduces surface temperatures. Outdoor Shower. Metal Roof 2013. Hurricane Accordion and Metal Bahama Shutters in 2021. Upgraded Electrical system in 2022. Upgraded Flooring, Doors, and Windows. Mini-Split AC unit 2021. Upper Level Covered Balcony, beautiful views of the new Sparkling Pool and Boat Dock-Canal. Ample Storage, 3 large outdoor access rooms, and a shed. Excellent Parking, 12 Cars, RV, and Boat-Trailer storage. Ocean side, minutes to World Class Fishing-Diving in the Gulfstream, Coffins Patch Reef, and Sombrero Reef Lighthouse. Easy Bayside access via Vaca Cut in minutes. Join the Cabana Club, steps away, for beach access and excellent dining. Key Colony Beach amenities includes: Golf Course 9 Hole Par 3, Tennis and Pickle Ball Courts, Basketball, Bocce Ball, Corn Hole, Horseshoes. Enjoy the Parks, Playgrounds, Walking and Bike pathways. Key Colony Beach, Paradise Awaits! Directions: Overseas Hwy US-1 Ocean Side turn onto Sadowski Cswy. Go to the end of Sadowski and follow the curve to the left onto E Ocean Dr to 4th Street turn left, house is on the right at 330-340.

Association Info

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

Fee Includes

None: 1

Dockage

Dock Length: 60 Dock: Concrete Boat Lift: 1 Seawall: Concrete

Tax Exemptions

Homestead: 1

Appliances

Dishwasher: 1 Dryer: 1 Freezer: 1 Ice Machine: 1 Oven: 1 Range: 1 Refrigerator: 1 Washer: 1

Pets

Pets Allowed: 1

Cooling

Ceiling Fans(s): 1 Central Air: 1

Heating

Central: 1

Waterfront

Canal Front: 1

Waterview

Canal View: 1

Floor

Laminate: 1 Tile: 1

Neighborhood Feature

Beach: 1 Bike Paths: 1 Community Boat Ramp: 1 Tennis Courts: 1 Other Area Features: 1

Interior Features

Built-in Cabinets: 1 Drapes/Blinds Incl: 1 Security System: 1 Smoke Alarms: 1 Split Bedroom: 1 Storage: 1 Window Treatments: 1

Property Condition

Updated/Remodeled: 1

Specialty Rooms

Laundry Room: 1

Building Style

Above Flood: No Stories: 2 Stories

Vehicle Storage

Car(s): 4+ Open Parking: 1 RV Parking Open: 1 Trailer Storage: 1

Security

On Premises System: 1 Patrolled Area: 1

Construction

Frame: 1 Hardi Board Siding: 1

Land Size

Less Than 1/4 Acre: 1

Furnished

Negotiable: 1

Terms

Cash: 1 Conventional: 1

Utilities

Buyer to Verify: 1 FKAA: 1 Municipal Sewer: 1

Porch/Balcony

Open Porch/Balcony: 1 Patio: 1

Title

Title Ins - Buyer: 1

Exterior Features

Fencing: 1 Lighting: 1 Outdoor Shower: 1 Shed: 1 Storage: 1

Pool Info

In Ground: 1 Salt Water: 1 Other: Chilled Heated: Yes Fiberglass: 1 Decked: 1

Roof

Metal Roof: 1

Financial Status

Standard Sale: Yes

Shutters

Accordion: 1 Bahama: 1

Status Change Info

Status: Active

Property Features

Fee Includes: None Tax Exemptions: Homestead Waterfront: Canal Front Waterview: Canal View Dockage: Boat Lift Property Condition: Updated/Remodeled Vehicle Storage: Open Parking; RV Parking Open; Trailer Storage Furnished: Negotiable Cooling: Ceiling Fans(s); Central Air Heating: Central Utilities: Buyer to Verify; FKAA; Municipal Sewer Interior Features: Built-in Cabinets; Drapes/Blinds Incl; Security System; Smoke Alarms; Split Bedroom; Storage; Window Treatments Specialty Rooms: Laundry Room Appliances: Dishwasher; Dryer; Freezer; Ice Machine; Oven; Range; Refrigerator; Washer Exterior Features: Fencing; Lighting; Outdoor Shower; Shed; Storage Pool Info: In Ground; Salt Water; Fiberglass; Decked Construction: Frame; Hardi Board Siding Shutters: Accordion; Bahama Floor: Laminate; Tile Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Beach; Bike Paths; Community Boat Ramp; Tennis Courts; Other Area Features Security: On Premises System; Patrolled Area Land Size: Less Than 1/4 Acre Terms: Cash; Conventional Title: Title Ins - Buyer

Listing Office: Water Vista Realty, Inc.

Last Updated: April - 13 - 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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