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Marathon Duplex & Multi-Family Homes for Sale
Income Properties in the Middle Florida Keys
Duplexes and multi-family homes in Marathon offer opportunities for rental income, multi-generational living, or owner-occupant investment. These properties appeal to both local residents and out-of-area investors seeking a foothold in the Florida Keys rental market.
This section covers listings from Layton (MM 68.5) through Duck Key, Grassy Key, Key Colony Beach, Coco Plum, Sombrero Beach, and south to the Seven Mile Bridge. Some properties are licensed for short-term rentals, while others are suited for long-term tenants or owner-occupied duplexes.
Building styles vary from elevated concrete homes to older ground-level structures. Zoning regulations and rental restrictions differ by area, so it’s important to verify whether vacation rentals, long-term leases, or employee housing are permitted on a case-by-case basis.
Explore Other Property Types in Marathon
Listings Start Below
Note: The listings below show the most recent 100 duplex and multi-family properties in the Marathon area. Use the filters to refine by zoning, rental licenses, unit count, or price.
Have questions about rental restrictions, long-term leases, or income potential? Contact Jim Signor for local insight and help evaluating investment options.
Multi-Family Properties
Income producing new CBS construction full duplex for sale in Coco Plum. Each side is 3 bedroom 2 bath with washer & dryer, covered parking and tenants in place (contac...
- 6 Beds
- 4 Baths
- 620347 MLS
INCOME PRODUCING! Unlock the potential of this rare Marathon property located in the desirable Vaca Village neighborhood. Situated on a 5,158-square-foot lot, this duplex...
- 2 Beds
- 2 Baths
- 620289 MLS
Waterfront duplex opportunity on Sombrero Beach Road in Marathon, just about 1 mile from Sombrero Beach. This stilted full duplex offers 4 bedrooms, 4 bathrooms, 2,114 sq...
- 4 Beds
- 4 Baths
- 620220 MLS
Beautifully renovated and fully turnkey duplex located on a deep-water canal in the heart of Marathon. This rare income-producing property features two spacious 2BD/2BA u...
- 4 Beds
- 4 Baths
- 619866 MLS
Investment Opportunity in the Heart of Marathon. This Half Duplex has Two Bedrooms and One Bathroom and a small back yard with a shed. Brand new central air. Ample park...
- 2 Beds
- 1 Baths
- 619861 MLS
Investment Opportunity in the Heart of Marathon. This Half Duplex has Two Bedrooms and One Bathroom. Ample parking in the front yard. Long time Tenants in place. Othe...
- 2 Beds
- 1 Baths
- 619860 MLS
Updated, elevated, and centrally located, this 2-bedroom, 1-bath half duplex offers an appealing combination of durable construction, modern finishes, and flexible Keys l...
- 2 Beds
- 1 Baths
- 619582 MLS
Incredible Income-Producing Full Duplex | 8 Bedrooms | 6 Bathrooms | 4 Bedrooms | 3 Bathrooms per Unit | 2 Pools | 40' Dock Rare opportunity to own a highly desirable, ne...
- 8 Beds
- 6 Baths
- 619555 MLS
Welcome to your slice of paradise in the heart of Marathon! This exceptional ocean-side retreat is where luxury, lifestyle, and opportunity come together in one unforgett...
- 3 Beds
- 2 Baths
- 619508 MLS
Welcome to your slice of paradise in the heart of Marathon! This beautifully reimagined 3-bedroom, 2-bath waterfront retreat offers 1,342 sq ft of spacious stylish, coast...
- 3 Beds
- 2 Baths
- 619502 MLS
Step out to your 35-ft. dock on a clean, deep canal and enjoy instant ocean access from this solid CBS half-duplex. Inside, find an open layout, tile floors, a granite ki...
- 2 Beds
- 2 Baths
- 617668 MLS
What a gem! This elevated two-bedroom half-duplex offers tons of natural light and peaceful peek-a-boo open ocean views from the living areas and from the porch and fabul...
- 2 Beds
- 1 Baths
- 618964 MLS
'United States Bankruptcy Auction. The Listing Price is for MLS Purposes only. Actual Price will be determined at Auction. Now Accepting Pre-Auction Stalking Horse Bids. ...
- 2 Beds
- 2 Baths
- 618269 MLS
Magnificent legal duplex in the vibrant heart of the Florida Keys, offering highly sought-after 7-day rental flexibility--an exceptional advantage for investors and homeo...
- 4 Beds
- 4 Baths
- 618025 MLS
Two homes on open water for the price of one! Over 18,000 square foot lot, bay bottom, two building rights. Wake up to endless Gulf views and fall asleep to breat...
- 6 Beds
- 4 Baths
- 618849 MLS
Discover a rare opportunity in the heart of the Florida Keys! This full duplex with TWO building rights offers 2 spacious, 2-bedroom, 1-bathroom units, each unit thoughtf...
- 4 Beds
- 2 Baths
- 616290 MLS
Wake up to breathtaking open water views and embrace the ultimate Florida Keys lifestyle in this oceanfront A-frame located in the private, highly sought-after Lion's Lai...
- 3 Beds
- 2 Baths
- 618474 MLS
Charming 2 bedroom, 2 bathroom half duplex in Marathon with highly desirable 7-day rental flexibility. Located just four properties from the Atlantic Ocean, this stilted ...
- 2 Beds
- 2 Baths
- 618501 MLS
Solid CBS full duplex in the heart of Marathon, set on an oversized 10,000 sq. ft. lot with mature native trees for added shade and privacy. Built for strength and long-t...
- 4 Beds
- 2 Baths
- 618176 MLS
