Renovated Waterfront Duplex with
For Sale
$1,849,000
330-340 4th Street, Key Colony Beach, FL 33051
Residential, Key Colony, FL
Property Size2,540 SF
Lot Size0.15 Acres
Price / SF$727.95
Days on Market187
Property Features for 330-340 4th Street
General Information
Property type
Residential Multi Family
Property subtype
Duplex
Zoning
R-2A - Key Colony Two Fam
Bedrooms
3
Bathrooms
4
Full bathrooms
3
Half bathrooms
1
Rooms
Bathroom 1, Bathroom 3, Bedroom 3, Bedroom 2, Bathroom 2, Bathroom 4, Bedroom 1
Parking features
RV, Open
Security features
Security System
Patio and Porch features
Patio, Porch
Pets allowed
Yes
Pool private
1
Interior features
Built-in Cabinets, Security System, Storage
Exterior features
Fencing, Lighting, Outdoor Shower, Shed, Storage
Fencing
Fenced
Appliances
Washer, Dryer, Dishwasher, Refrigerator, Range, Oven, Freezer, Ice Machine
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.
Standard status
Active
APN
00072990-000000
Size
2,540 SF
Lot size
0.15 Acres
Taxes and HOA fees
Tax Year
2025
Tax 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
Tax Annual Amount
10605
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
Utilities
Heating system
Central
Cooling system
Central Air
Water front
1
Amenities
pool
outdoor shower
covered balcony
boat lift
deep water dock
security cameras
storage
shed
Building Details
Year built
1971
Flooring type
Laminate, Tile
Building materials
Frame, Hardi Board Siding
Roof type
Metal
Additional Structures
Storage
Listing Agency:
Water Vista Realty, Inc.
Listed By:
Dan Cloud · License #3144777
(305) 396-7844
Added: Apr 4
Changed: Oct 1
Last Checked: Oct 7 at 6:06AM
MLS# 619361
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.
Investment Insights
Based on property information with market context.
Located at 330-340 4th Street in Key Colony, this 2,540-square-foot duplex offers an upper residence with two bedrooms and two bathrooms plus a lower residence with one bedroom and one-and-a-half bathrooms. Both units have full kitchens. The property includes a private heated and chilled pool with a saltwater system, a covered upper-level balcony, outdoor shower, storage areas, and a shed. Metal roofing, upgraded electrical service, flooring, doors, windows, and storm protection contribute to the updated configuration.
Waterfront improvements include a 60 Ft deep-water dock, extra-wide canal, multiple electrical outlets, three fresh-water spigots, and a 15K lbs. boat lift installed in 2022. The site also provides parking and storage capacity for 12 cars, 2 RVs, and 2 boats/trailers. Seven-day rentals are allowed, and the R-2A - Key Colony Two Fam zoning supports the duplex configuration.
Waterfront improvements include a 60 Ft deep-water dock, extra-wide canal, multiple electrical outlets, three fresh-water spigots, and a 15K lbs. boat lift installed in 2022. The site also provides parking and storage capacity for 12 cars, 2 RVs, and 2 boats/trailers. Seven-day rentals are allowed, and the R-2A - Key Colony Two Fam zoning supports the duplex configuration.
Key Highlights
- 2,540 Square Feet on a 0.15‑acre waterfront lot
- Upper 2BR/2BA unit and lower 1BR/1.5BA unit, each with a full kitchen
- 60 Ft deep‑water dock on an extra‑wide canal
Property Analytics
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Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
172
Businesses Nearby
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Business Placement
Demographics for 33051, FL
790
Population
1,132
Households
0.7
Avg Household Size
63
Median Age
48%
College-Educated
95%
High-School Grad
0.4 sq mi
ZIP Area
1,975
Density / Sq Mi
$94,531
Median Household Income
$38,860
Median Earnings
$1,849
Median Rent
$834,800
Median Home Value
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Market
Vacancy Rate% for Multifamily in South region
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Frequently Asked Questions
What type of property is this?
Duplex - Two renovated units each feature a full kitchen, with short-term rentals permitted.
Where is this duplex located?
The property is located at 330-340 4th Street Key Colony Beach, FL.
What is the asking price?
The asking price for this property is $1,849,000.
What are key features of this property?
This property features: 2,540 Square Feet on a 0.15‑acre waterfront lot; Upper 2BR/2BA unit and lower 1BR/1.5BA unit, each with a full kitchen; 60 Ft deep‑water dock on an extra‑wide canal
