Waterfront Duplex with Boat
For Sale
Under Contract
$2,750,000
139 Marina Avenue, Key Largo, FL 33037
Residential, Key Largo, FL
Property Size2,485 SF
Lot Size0.21 Acres
Price / SF$1,106
Days on Market134
Property Features for 139 Marina Avenue
General Information
Property type
Residential Multi Family
Property subtype
Duplex
Zoning
IS - Improved Subivision
Bedrooms
4
Bathrooms
5
Full bathrooms
4
Half bathrooms
2
Rooms
Bathroom 6, Bathroom 1, Bathroom 4, Bathroom 2, Bedroom 4, Bedroom 2, Bathroom 3, Bedroom 1, Bedroom 3, Bathroom 5
Parking features
Open
Security features
Security
Window features
Blinds
Patio and Porch features
Porch
Pets allowed
Yes
Pool private
1
Interior features
Built-in Cabinets, Smoke Alarms, Storage, Quartz Countertops
Exterior features
Chickee Hut, Fencing, Detached Guest Qtrs, Hot Tub, Lighting, Privacy Wall/Fence, Storage
Fencing
Fenced, Privacy
Appliances
Washer, Dryer, Dishwasher, Refrigerator, Range, Microwave, Disposal, Stainless Steel Appliance(s)
Subdivision
Port Largo (100.0)
View
Ocean
Directions
MM 100- Oceanside. Home is on the left- hand side of Marina Ave.
Standard status
Active Under Contract
APN
00452700000000
Size
2,485 SF
Lot size
0.21 Acres
Additional Details
Individually Metered Utilities
electricity, water
Taxes and HOA fees
Tax Year
2025
Tax Description
Lt 139 Port Largo-Key Largo Pb5-3 Or558-557 Or560-1023 Or795-373 Or825-1828 Or995-248 Or1454-234 Or1598-90 Or1651-2119 O
Tax Annual Amount
14394
HOA Fee
$300 Annually
Legal Description
Lt 139 Port Largo-Key Largo Pb5-3 Or558-557 Or560-1023 Or795-373 Or825-1828 Or995-248 Or1454-234 Or1598-90 Or1651-2119 O
Utilities
Heating system
Central
Cooling system
Central Air
Water front
1
Amenities
heated saltwater pool
concrete dock
20,000-pound Neptune boat lift
covered parking
spacious storage room
tiki hut
impact windows and doors
electric gated entrance
Building Details
Year built
1980
Flooring type
Tile, Vinyl
Building materials
CBS
Roof type
Concrete
Additional Structures
Storage
Buildings
1
Listing Agency:
American Caribbean Real Estate, Christie's International Real Estate
(305) 451-4078
Listed By:
Carlos Lorenzo · License #634298
(786) 251-4823
Added: Jun 24
Changed: Oct 26
Last Checked: Nov 4 at 8:06AM
MLS# 620392
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.
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Investment Insights
Based on property information with market context.
This 2,485-square-foot duplex contains two side-by-side residences, each with 2 bedrooms and 2.5 bathrooms. The combined layout provides 4 bedrooms, 4 full baths, and 2 half baths. Built in 1980 with concrete construction, the property has been renovated and includes updated kitchens, flooring, and bathrooms. Impact-rated windows and doors, separate electric and water meters, covered parking, and ground-level storage serve both units. Furnishings and decor are included.
The 0.21-acre parcel has 75 feet of waterfront along an 80-foot-wide deep-water canal, with ocean views and access to the Atlantic. Waterfront improvements include a concrete dock, a 20,000-pound boat lift, and a heated saltwater pool. Balconies face sunrise views; a nature preserve is across the street, and the Port Largo homeowners' park is nearby. An outdoor tiki hut and gated entrances on both sides complete the property.
The 0.21-acre parcel has 75 feet of waterfront along an 80-foot-wide deep-water canal, with ocean views and access to the Atlantic. Waterfront improvements include a concrete dock, a 20,000-pound boat lift, and a heated saltwater pool. Balconies face sunrise views; a nature preserve is across the street, and the Port Largo homeowners' park is nearby. An outdoor tiki hut and gated entrances on both sides complete the property.
Key Highlights
- Two attached units, each with 2 bedrooms and 2.5 bathrooms
- 2,485‑square‑foot building on a 0.21‑acre parcel
- 75 feet of waterfront along an 80‑foot‑wide deep‑water canal
Property Analytics
Who owns this building?
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Lease Details
2
Residential units
Yes
Utilities to site
Location Intelligence
Trade Area within ½ mile
533
Businesses Nearby
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Business Placement
Demographics for 33037, FL
13,875
Population
10,494
Households
1.3
Avg Household Size
53
Median Age
41%
College-Educated
95%
High-School Grad
32.9 sq mi
ZIP Area
422
Density / Sq Mi
$80,911
Median Household Income
$40,641
Median Earnings
$1,896
Median Rent
$660,700
Median Home Value
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Market
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Frequently Asked Questions
What type of property is this?
Duplex - Two attached residences offer separate utility meters, private en-suite bedrooms, and shared waterfront amenities.
Where is this duplex located?
The property is located at 139 Marina Avenue Key Largo, FL.
What is the asking price?
The asking price for this property is $2,750,000.
What are key features of this property?
This property features: Two attached units, each with 2 bedrooms and 2.5 bathrooms; 2,485‑square‑foot building on a 0.21‑acre parcel; 75 feet of waterfront along an 80‑foot‑wide deep‑water canal
