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$1,899,000

  • For Sale
  • Active
  • Duplex
  • 3 Beds
  • 3 Full Baths
  • 1 Partial Bath
  • 2,540 Sq. Ft.
  • Updated 14 hours ago
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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!

Full Property Details for 330-340 4th St

General

  • Price: $1,899,000
  • Taxes: $10,604 (2025)
  • Status: Active
  • Type: Duplex
  • Source: 927
  • MLS ID: 619361
  • Updated: 4/4/2026
  • Added to Site: 9 day(s) ago

Interior

  • Rooms/Areas: Laundry Room
  • Interior Features: Drapes/Blinds Incl, Window Treatments, Storage, Smoke Alarms, Security System, Built-in Cabinets, Split Bedroom
  • Appliances: Washer, Ice Machine, Freezer, Oven, Range, Refrigerator, Dishwasher, Dryer
  • Furnishings: Negotiable
  • Flooring: Tile, Laminate

Rooms

Bathrooms

  • Total Bathrooms: 4
  • Full Bathrooms: 3
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 3

Additional Information

  • Shared Amenities: Community Boat Ramp, Bike Paths, Other Area Features, Beach, Tennis Courts
  • Pool: Yes
  • Pool Description: In Ground, Decked, Fiberglass, Salt Water, Chilled
  • Security/Safety: Patrolled Area, On Premises System

Exterior

  • Exterior Features: Fencing, Storage, Shed, Outdoor Shower, Lighting
  • Deck/Patio: Open Porch/Balcony, Patio

Parking

  • Parking: Open Parking, Trailer Storage, RV Parking Open

Location

  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • County: Monroe
  • Subdivision: Key Colony Beach (53.5)
  • Driving 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.

Community

  • Assoc. Fees Include: None
  • Pets Allowed: Yes

Heating & Cooling

  • Cooling Type: Central Air, Ceiling Fans(s)
  • Heating Type: Central

Utilities

  • Water: Canal View
  • Utility Description: FKAA, Buyer to Verify, Municipal Sewer

Structural Information

  • Architectural Style: Duplex
  • Construction Status: Updated/Remodeled
  • Construction: Frame, Hardi Board Siding
  • Roof: Metal Roof
  • Dock Size: 60
  • Stories/Levels: 2 Stories
  • Square Feet: 2,540
  • Sq. Ft. Source: Tax Records
  • Year Built: 1971
  • Property Condition: Updated/Remodeled

Lot Features

  • Lot Size (Sq. Ft.): 6,600
  • Lot Dimensions: 60 x 110
  • Zoning: R-2A - Key Colony Two Family

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front Type: Canal Front
  • Dock Description: Boat Lift

Financial Considerations

  • Tax Amount: $10,604
  • Tax Year: 2025
  • Terms: Cash, Conventional

Disclosures and Reports

  • Legal Description: 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
  • Flood Zone: AE
  • Rentals Allowed: Yes
  • APN: 00072990-000000

Listed by Water Vista Realty, Inc., Dan Cloud (305) 396-7844

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Listing agent

— 330-340 4th St —

  • Dan Cloud

    Water Vista Realty, Inc.

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with our affiliated lender
NMLS#: 1598647

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Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Price & Sales History for 330-340 4th St Get Price Alerts and Save Property

Date
Details
Price
Change
Source
4/04/2026
Listed
$1,899,000
99.89%
MLS
5/27/2021
Sold
$950,000
—
Public Record
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Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 330-340 4th St

Year
Property Taxes
Change
Tax Assessment
Change
2024
$10,549
—
$1,052,084
3%
2024
$10,549
4%
$1,022,434
3%
2023
$10,186
91%
$992,655
107%
2021
$5,336
-44%
$480,114
-48%
2022
$9,467
77%
$927,158
101%
2021
$5,336
7%
$461,854
2%
2019
$4,997
8%
$453,830
7%
2018
$4,617
9%
$423,393
-2%
2017
$4,242
—
$433,911
—
2016
$4,238
10%
$434,877
25%
2015
$3,867
2%
$347,681
6%
2014
$3,796
3%
$327,688
6%
2013
$3,690
—
$308,471
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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NMLS#: 1598647

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Listed by Water Vista Realty, Inc., Dan Cloud (305) 396-7844

330-340 4th Street, Key Colony, FL 33051 (MLS# 619361) is a Duplex property with 3 bedrooms, 3 full bathrooms and 1 partial bathroom. 330-340 4th Street is currently listed for $1,899,000 and was received on April 04, 2026. Want to learn more about 330-340 4th Street? Do you have questions about finding other Duplex real estate for sale in Key Colony? You can browse all Key Colony real estate or contact a Coldwell Banker agent to request more information.

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