330-340 4th St

Key Colony Beach, FL 33051

$1,849,000
Price
3
Beds
2,540 Sq. Ft.
$728 / Sq. Ft.
2,540
Sq. Ft.
$728
per Sq. Ft.
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a view of a swimming pool and lounge chairs in back yard of the house
Ocean Side - Bay Side 330-340 4th St, Ke
an aerial view of a city with lots of residential buildings and ocean view in back
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a view of swimming pool outdoor seating and hardwood
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a front view of a building
a view of a house with a yard and lake view
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a view of a backyard with sitting area
a view of a patio with swimming pool
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a front view of a house with garden
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a view of entryway
a living room with furniture and a chandelier
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a dining room with furniture and window
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a kitchen with stainless steel appliances granite countertop a refrigerator a stove a sink dishwasher and white cabinets with wooden floor
a kitchen with stainless steel appliances granite countertop a stove sink and cabinets
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a view of hallway with walk in closet
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a bedroom with a bed and a chandelier
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a bathroom with a granite countertop sink a toilet and shower curtain
a bathroom with a shower and a toilet
a bathroom with a granite countertop sink a mirror and shower
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a bedroom with a bed and a flat screen tv
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a bathroom with a bathtub and a sink
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a living room with furniture and gym equipment
a very nice looking living room with a couch and a window
a living room with furniture and a couch
a open dining room with stainless steel appliances a dining table and chairs with the bookshelf
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a kitchen with stainless steel appliances kitchen island granite countertop a sink and cabinets
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a bedroom with a bed and a chandelier
a bedroom with a bed and a tv in it
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a living room with furniture and a couch
a bathroom with a sink vanity mirror and toilet
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a view of backyard with garden
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a view of a lake with a house
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a view of a golf course with a lake
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a view of swimming pool with outdoor space

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...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!
  1. Listed by Dan Cloud • Water Vista Realty, Inc.

Property Details for 330-340 4th Street

Waterfront
Canal Front
Waterfront
Yes
Zoning
R-2A - Key Colony Two Family
Subdivision
Key Colony Beach (53.5)
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.
Vehicle Storage
Open Parking, Trailer Storage, RV Parking Open
Pets
Pets Allowed
LISTING UPDATED: 04/20/2026 10:08 AM

Property Details for 330-340 4th Street

StatusActive
MLS #619361
Days on Market56
Taxes$10,605 / year
HOA Fees-
Condo/Co-op Fees-
Property TypeMulti Family
MLS TypeResidential / Duplex
Year Built1971
Lot Size0.15 AC / 6,600 SF
CountyMonroe County
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Location

Listing Courtesy of Water Vista Realty, Inc.
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Building Information for 330-340 4th Street

Stories2Residences-Year Built1971Building Size-Lot Size0.15 AC / 6,600 SF

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$10,098 per month

30 year fixed, 6.36% Interest

Principal and Interest

$9,214

Property Taxes

$884

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

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Property Information for 330-340 4th Street

Summary
Location and General Information
  • Waterview: Canal View
  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • Absolute Longitude: 81.015727
  • Control Depth: 4
  • Listing Board: Florida Keys
  • Side: Ocean
  • Mile Marker: 53.5
  • Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
  • Neighborhood Feature: Community Boat Ramp, Bike Paths, Other Area Features, Beach, Tennis Courts
  • Key/Island: Key Colony
Taxes and HOA Information
  • Association Info: Mandatory Home Owners Asc: No
  • Association Info: 1st Right of Refusal: No
  • Fee Includes: None
  • Furnished: Negotiable
  • Tax Year: 2025
  • Tax Exemptions: Homestead
Property
Lot Information
  • Lot Size: 60 X 110
  • Acres: 0.15
  • Parcel #: 00072990-000000
  • Land Size: Less Than 1/4 Acre
Property and Assessments
  • 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
  • MLS Approved: Y
  • SqFt Source: Tax Records
  • Flood Zone: AE
  • Rentals Allowed: Yes
  • Deed Restrictions: No
  • Picture Count: 68
  • Document Count: 0
  • Building Style: Above Flood: No
  • Property Condition: Updated/Remodeled
  • Security: Patrolled Area, On Premises System
  • Title: Title Ins - Buyer
Utilities
  • Utilities: FKAA, Buyer to Verify, Municipal Sewer
  • Pub Sewer HkUp: Yes
  • Pool: Yes
  • Pool Info: Other: Chilled
  • Pool Info: Heated: Yes
  • Pool Info: In Ground, Decked, Fiberglass, Salt Water
  • Porch/Balcony: Open Porch/Balcony, Patio
Interior and Exterior Features
Interior Features
  • Floor: Tile, Laminate
  • 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
Exterior Features
  • Roof: Metal Roof
  • Shutters: Accordion, Bahama
  • Dockage: Dock Length: 60
  • Dockage: Dock: Concrete
  • Dockage: Seawall: Concrete
  • Construction: Frame, Hardi Board Siding
  • Dockage: Boat Lift
  • Exterior Features: Fencing, Storage, Shed, Outdoor Shower, Lighting
Room Information
  • Specialty Rooms: Laundry Room

Property History for 330-340 4th Street

DateEvent & SourcePriceAppreciation
Apr 4, 2026

Price Change

FKMLS #619361

$1,899,000—
Apr 4, 2026

Listed (Active)

FKMLS #619361

$1,849,000—
DateEvent & SourcePrice
04/04/2026

Price Change

FKMLS #619361

$1,899,000
04/04/2026

Listed (Active)

FKMLS #619361

$1,849,000

For completeness, we often displays two records for one sale: the MLS record and the public record.

Schools near 330-340 4th Street

This home is within Monroe.
Rating
School
Type
Grades
Distance
Stanley Switlik Elementary School
Public - PK to 5
Marathon School
Public - 6 to 12
Coral Shores High School
Public - 9 to 12
Big Pine Academy
Charter - PK to 5
Rating
School
Distance
Stanley Switlik Elementary School
PublicPK to 5

Marathon School
Public6 to 12

Coral Shores High School
Public9 to 12

Big Pine Academy
CharterPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 330-340 4th Street, Key Colony Beach, FL 33051

330-340 4th Street is a multi-family home for sale in Key Colony Beach, FL 33051. This property was listed for sale on April 4, 2026 by Water Vista Realty, Inc., it's currently listed at $1,849,000. This listing's school district is Monroe. Nearby schools include Stanley Switlik Elementary School, Marathon School and Coral Shores High School. 330-340 4th Street is a 3-bed, 4-bath, 2,540 sqft multi-family home built in 1971.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties make no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of Water Vista Realty, Inc.

Based on information from one of the following Multiple Listing Services: Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS®. Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.