330-340 4th Street, Key Colony, FL 33051 (MLS# 619361)

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

New Listing

$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: 4/05/2026

Overview

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. Upgra ... (Read more)

Listing Details MLS# 619361

Location, Tax & Legal

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
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

Contract Information

Listing Board: Florida Keys

General Property Description

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

Association Info

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

Dockage

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

More Information

Building Style

Above Flood: No
Stories: 2 Stories

Vehicle Storage

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

Pool Info

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

Financial Status

Standard Sale: Yes

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.

Fee Includes

None: Yes

Tax Exemptions

Homestead: Yes

Appliances

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

Pets

Pets Allowed: Yes

Cooling

Ceiling Fans(s): Yes
Central Air: Yes

Heating

Central: Yes

Waterfront

Canal Front: Yes

Waterview

Canal View: Yes

Floor

Laminate: Yes
Tile: Yes

Neighborhood Feature

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

Interior Features

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

Property Condition

Updated/Remodeled: Yes

Specialty Rooms

Laundry Room: Yes

Security

On Premises System: Yes
Patrolled Area: Yes

Construction

Frame: Yes
Hardi Board Siding: Yes

Land Size

Less Than 1/4 Acre: Yes

Furnished

Negotiable: Yes

Terms

Cash: Yes
Conventional: Yes

Utilities

Buyer to Verify: Yes
FKAA: Yes
Municipal Sewer: Yes

Porch/Balcony

Open Porch/Balcony: Yes
Patio: Yes

Title

Title Ins - Buyer: Yes

Exterior Features

Fencing: Yes
Lighting: Yes
Outdoor Shower: Yes
Shed: Yes
Storage: Yes

Roof

Metal Roof: Yes

Shutters

Accordion: Yes
Bahama: Yes

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 - 05 - 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.