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

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

$1,849,000

Virtual Tour

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Ocean Side - Bay Side 330-340 4th St, Ke

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

Current Price: $1,849,000 List Date: 4/04/2026 Last Modified: 9/16/2026

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

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

Association Info

Mandatory Home Owners Asc: No
1st Right of Refusal: No

Dockage

Dock Length: 60
Dock: Concrete
Seawall: Concrete

More Information

Building Style

Above Flood: No
# Stories: 2 Stories

Vehicle Storage

Car(s): 4+

Pool Info

Other: Chilled
Heated: Yes

Financial Status

Standard Sale: 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: September - 16 - 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.