WATERFRONT BEAUTIFULLY RENOVATED DUPLEX 330-340, 2BR 2BA Upper

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Home For Sale

330-340 4th St

Key Colony Beach, Florida 33051

Monroe County

Waterfront: Yes

Community: Key Colony Beach (535)

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$1,849,000 3 br, 4.0 bath 2540 sq. ft. 0.150 acres

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, 2 RVs, and 2 Boats/Trailers 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 a 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!

Interior:
  • Bedrooms: 3
  • Baths: 4.0
  • Sq Ft: 2540
  • Year Built: 1971
  • Utilities: 
  • Fireplaces: 
  • Stories: 2
  • Heat/AC: 
  • Garage: Open, RV
Exterior:
  • Lot Size: 0.150 acre
  • Lot Dimensions: 
  • Waterfront: Yes
  • View Types: 
  • Yard: 
  • Siding: Frame
  • Roof: Metal
  • Property Taxes: $10,605
  • MLS #: 619361
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Contact Information:
Beach Home For Sale in Key Colony Beach, Florida
Listing Agent: Dan Cloud, Water Vista Realty LLC, 305-396-7844, 305-396-7844 Listing Site, Listing Status: Active
Copyright © 2026 Florida Keys Board of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Ad Number: 7522884
Viewed 42 times.
Updated: Apr 18, 2026

This property is a Home located at 330-340 4th St, Key Colony Beach, Florida 33051, and is currently For Sale at $1,849,000. This Home has 3 bedrooms, 4.0 baths, 2540 sq ft.