Turnkey Waterfront Duplex
For Sale
$2,750,000
139 Marina Avenue, Key Largo, FL 33037
MULTI_FAMILY - Key Largo, FL
Property Size2,485 SF
Lot Size0.21 Acres
Price / SF$1,106
Days on Market37
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 5, Bathroom 2, Bathroom 4, Bedroom 2, Bedroom 4, Bedroom 1, Bathroom 1, Bedroom 3, Bathroom 3, Bathroom 6
Parking features
Open
Security features
Security
Patio and Porch features
Porch
Pets allowed
Yes
Pool private
1
Interior features
Built-in Cabinets, Storage, Quartz Countertops
Exterior features
Chickee Hut, Fencing, Detached Guest Qtrs, Hot Tub, Lighting, Privacy Wall/Fence, Storage
Fencing
Privacy, Fenced
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
APN
00452700000000
Size
2,485 SF
Lot size
0.21 Acres
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
Building Details
Year built
1980
Flooring type
Tile, Vinyl
Building materials
CBS
Roof type
Concrete
Additional Structures
Storage
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: Jul 24
Last Checked: Jul 30 at 1:06PM
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.
Investment Insights
Based on property information with market context.
This turnkey waterfront duplex consists of two side-by-side townhomes, each with 2 bedrooms and 2.5 bathrooms, for a total of 4 bedrooms, 4 full bathrooms, and 2 half bathrooms. The residence is described as built entirely of concrete and fully renovated, with updated kitchens, flooring, and baths. Each bedroom is noted as having a private en-suite bath. Outdoor and water-access features include a brand-new heated saltwater pool, a concrete dock, and a 20,000-pound Neptune boat lift. Additional improvements include all impact windows and doors, separate electric and water meters for each unit, and furnishings and decor included. The ground level provides a storage room, covered parking, and a spacious tiki hut for outdoor living.
The property is located at 139 Marina Avenue in Key Largo, set on 75 feet of waterfront along an 80-foot deep-water canal, with ocean access described as quick. The remarks also indicate sunrise views from balconies and a nature preserve directly across the street, plus proximity to the private Port Largo homeowners' park.
For tenants, buyers, or owners seeking a concrete, renovated duplex setup with two separate utility meters and strong flexibility, this offering provides two complete townhome residences paired with dock and boating amenities. It may also appeal as a family compound or waterfront retreat due to the dual-unit configuration and included furnishings.
The property is located at 139 Marina Avenue in Key Largo, set on 75 feet of waterfront along an 80-foot deep-water canal, with ocean access described as quick. The remarks also indicate sunrise views from balconies and a nature preserve directly across the street, plus proximity to the private Port Largo homeowners' park.
For tenants, buyers, or owners seeking a concrete, renovated duplex setup with two separate utility meters and strong flexibility, this offering provides two complete townhome residences paired with dock and boating amenities. It may also appeal as a family compound or waterfront retreat due to the dual-unit configuration and included furnishings.
Key Highlights
- Legally permitted duplex with 2 side‑by‑side townhomes; each has 2 bedrooms and 2.5 bathrooms (4 bedrooms total).
- 75 ft waterfront with ocean‑access deep‑water canal; features a concrete dock and 20,000‑lb Neptune boat lift.
- Brand‑new heated saltwater pool plus hot tub, tiki hut, and porch for outdoor living.
Property Analytics
Property Profile
Current Use
Lease Details
2
Residential units
Multi-tenant
Tenancy
Location Intelligence
Trade Area within ½ mile
662
Businesses Nearby
Explore this area
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
Market
Vacancy Rate% for Multifamily in South region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Duplex - Concrete, renovated duplex with ocean-view townhomes, private en-suite bedrooms, dock, and boat lift for flexible income or personal use.
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: Legally permitted duplex with 2 side‑by‑side townhomes; each has 2 bedrooms and 2.5 bathrooms (4 bedrooms total).; 75 ft waterfront with ocean‑access deep‑water canal; features a concrete dock and 20,000‑lb Neptune boat lift.; Brand‑new heated saltwater pool plus hot tub, tiki hut, and porch for outdoor living.
