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Harbor Isle Homes for Sale, Marathon, Florida Keys

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Total Listings 7
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$599,000
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,040 SqFt Days Listed: 3
Single Family - Active - Waterfront No
Side of Island: Ocean - Dockage: None

Great location in Marathon! Enjoy a short walk to nearby restaurants, shops, fishing and attractions! This freshly painted three bedroom, two bath stilted home has stainless appliances, granite counters, dark wood cabinets and more! Enjoy relaxing on your very own outdoor sun deck with water views. There is covered parking for up to 4 vehicles. Set on a spacious lot, this property offers ample room for boats, trailers, storage, or parking, making it ideal for boating enthusiasts. With quick access to open water, youll enjoy some of the best fishing and water activities the Keys have to offer. Whether youre looking for a permanent residence, a vacation home, or an investment opportunity, this property captures the essence of island living. Dont miss your chance to make it yours!

$749,000
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,260 SqFt Days Listed: 163
-7.42% ($60,000) 2 Price Changes : Last Change 105 Days Ago
Single Family - Contingent - Waterfront Yes
Side of Island: Ocean - Dockage: Boat Lift50ft.

Welcome to your serene canal front retreat. This charming property features an open concept design with an airy, open floor plan that seamlessly connects the living, dining and kitchen areas, perfect for family gathering sand entertaining. Equipped with updated appliances, the kitchen offers ample counter space and storage, catering to both casual meals and gourmet cooking. Retreat to the main bedroom with a spa like ensuite bathroom plus 2 cozy guests quarters. Expansive windows allow for natural light and views of the canal and boaters going bye. A spacious screened patio provides an ideal spot for morning coffee or afternoon toddy! This home features a concrete dock for boating, fishing or launching your kayak which also includes a 10,000 lb boat lift. Plenty of outdoor space for grilling and a shed for storage or crafting. This a perfect home for you or a vacation home, just bring your toothbrush and fishing pole!

$825,000
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,279 SqFt Days Listed: 116
Mobile Home - Active - Waterfront Yes
Side of Island: Bay/Gulf - Dockage: Boat Lift60ft.Concre

This home is in an excellent location on a deep water canal and Boot Key Harbor protection. Easy Boat access to Atlantic & Gulf. Walk or Bike to restaurants, beach, grocery stores and Home Depot, Boat ready with 15,000 lb. Lift on a 60 concrete seawall. This fully furnished 2 Bedroom 2 Bath home is the epitome of comfort & convenience, offering a wide range of features that cater to a relaxing and easy going lifestyle. A 3rd bedroom was converted to open social space with a Murphy Bed for additional Guest. The Home is incased in durable vinyl siding and features impact windows, providing a safe haven from the elements. The Interior has been thoughtfully upgraded,, featuring ceramic tile flooring. An open concept living/dining/kitchen that fosters a sense of unity and togetherness. The Kitchen is a Chefs delight with sleek Granit countertops, wine cooler, ample cabinet space, double pantry & stainless steel Appliances. Facing the Canal there is wall to wall Bay Windows providing full water view & sunlight. A Common Bathroom boasting a double vanity, 2 Large Bedrooms with a King bed and Bathroom in Master Suite and a Queen bed & Futon in 2nd Bedroom. Each room if fitted with window treatments & Blackouts for added privacy and comfort. Ample Closet space ensuring all your storage needs & a Washer/Dryer. For outdoor lovers the screened porch is a perfect retreat. It comes with comfortable fans for those warmer days & a built in Hot Tub for ultimate relaxation. A 2nd covered porch facing the canal with views of Boot Key Harbor & partial Sunsets. Property boast a fish cleaning station, water & electric on the Dock. An outdoor shower adds a touch of luxury to your beach days. The storage/workshop offers ample space for your tools & projects. Partially fenced, features trailer storage & excellent parking options. If you are looking for a vacation home, permanent residence or Rental Income 835 25th St. offers an affordable waterfront lifestyle thats hard to beat.

$849,000
Marathon
Harbor Isle - MM: 48.50
2 Bed, 2 Baths, 1,152 SqFt Days Listed: 35
Single Family - Active - Waterfront Yes
Side of Island: Ocean - Dockage: 50ft.

Location! Location! Location! Ocean side deep water home with an impressive 50ft of canal frontage! Spectacular waterfront home with views of Boot Key Harbor from your private deck! Rare deep-water canal with ocean access just minutes from your private dock! Enjoy this Renovated home with 2 beds and 2 full baths! Large outdoor entertaining space with kitchen and covered parking! whether youre looking for your own private deep water home or a 7-day vacation rental this is one that you must see!

$849,000
Marathon
Harbor Isle - MM: 48.50
2 Bed, 2 Baths, 1,152 SqFt Days Listed: 18
Single Family - Active - Waterfront Yes
Side of Island: Ocean - Dockage: 50ft.

Location! Location! Location! Ocean side deep water home with an impressive 50ft of canal frontage! Spectacular waterfront home with views of Boot Key Harbor from your private deck! Rare deep-water canal with ocean access just minutes from your private dock! Enjoy this Renovated home with 2 beds and 2 full baths! Large outdoor entertaining space with kitchen and covered parking! whether youre looking for your own private deep water home or a 7-day vacation rental this is one that you must see!

$949,000
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,152 SqFt Days Listed: 119
Mobile Home - Contingent - Waterfront Yes
Side of Island: Ocean - Dockage: Concrete

Welcome to 1254 James Ave, Marathon, FL 33050! This beautifully updated home offers 3 bedrooms and 2 bathrooms, making it the perfect coastal retreat. Step outside to a covered porch facing south, where you can enjoy warm breezes and stunning views of Boot Key. The home is located just steps away from kayak trails, offering easy access to water adventures. The property also features a 60-foot seawall, ideal for boating enthusiasts or those looking to launch kayaks and explore the nearby trails just across the water.Inside, the home has been thoughtfully remodeled, including a fully renovated master bathroom featuring a dual vanity and stylish new floors. The partially fenced yard provides privacy and a secure outdoor space, designed with families in mind. The fencing offers added peace of mind by helping protect kids and toddlers from wandering near the seawall, in addition to keeping pets safe.A concrete pad outside provides extra parking or outdoor activity space, while the garage accommodates one car or can be used for storage. With excellent views, modern updates, and a prime location close to water access, this property is a must-see for those looking to enjoy the best of Florida Keys living.

$2,745,000
Marathon
Harbor Isle - MM: 48.50
5 Bed, 5 Baths, 3,200 SqFt Days Listed: 46
-1.79% ($50,000) 1 Price Change : Last Change 2 Days Ago
Single Family - Active - Waterfront Yes
Side of Island: Ocean - Dockage: 50ft.Concrete

Brand New Coming in 2025: A Luxurious Waterfront Haven with Unparalleled Water Vistas, and Deep-Water Dockage! Experience the pinnacle of Florida Keys living in this 3,200 Sq Ft waterfront masterpiece, offering 5 Bedrooms 5 Bathrooms, and a seamless blend of elegance and comfort. Designed for the discerning buyer, this home features a private pool, an elevator, and a stunning rooftop deck, your front row seat to breathtaking sunsets over Boot Key Harbor. Work with Keys Dream Properties to personalize every detail, from interior and exterior colors to high-end tile, quartz countertops, lighting, and fixtures. Create a dream home that reflects your vision. Nestled in the heart of Marathon, this premier location offers easy access to world-class dining, boutique shopping, and the vibrant boating lifestyle. Your protected 50 foot Deep-Water dock places you just minutes from the Atlantic and Gulf, making fishing, snorkeling, and open-water adventures effortlessly accessible. On windy days when the open water of the Atlantic Ocean is not pleasant, Boot Key Harbor provides calm waters for social boating, on the water dining, and cocktails. Best of all, this exclusive property comes with no HOA fees, and allows 7-day rentals, offering both lifestyle flexibility and a lucrative investment opportunity in Marathons thriving vacation rental market. With permits secured and construction set to begin, now is your chance to claim this rare opportunity. Contact us today to start designing your custom Florida Keys retreat!

More Info
Most Recent Sales - (14) - Harbor Isle as of 2025-04-03
Sale Date Address Sale Price $/SF List Price Sq. Ft. Type Bd/Ba Days Listed
02-27-2025 735 26Th $450,000 $412 $499,000 1,091 Mobile Home 2/1 26
09-12-2024 668 James $675,000 $722 $799,000 934 Single Family 2/2 93
08-30-2024 798 28Th $380,000 $323 $399,000 1,176 Mobile Home 2/1 144
07-01-2024 905 25Th Street Ocean $870,000 $647 $925,000 1,344 Mobile Home 3/2 409
06-21-2024 755 25Th $650,000 $703 $699,000 924 Mobile Home 2/2 70
05-24-2024 1000 James $580,000 $794 $595,000 730 Mobile Home 2/2 87
03-22-2024 715 26th $575,000 $530 $625,000 1,084 Mobile Home 2/2 54
02-09-2024 695 27Th Street Ocean $875,000 $852 $885,000 1,026 Single Family 2/2 151
12-07-2023 716 26th Street Ocean $750,000 $568 $799,995 1,320 Single Family 3/2 168
10-20-2023 705 25Th $850,000 $1,106 $899,000 768 Mobile Home 2/2 18
09-26-2023 1019 27Th Street Ocean $975,000 $870 $999,000 1,120 Single Family 3/2 46
08-11-2023 946 27Th $525,000 $433 $548,000 1,210 Mobile Home 2/2 102
08-04-2023 711 28th Street Ocean $585,000 $618 $599,000 946 Single Family 2/1 23
05-31-2023 605 26Th Street Ocean $612,500 $486 $675,000 1,260 Mobile Home 3/2 143
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The information being provided by the Florida Keys MLS is exclusively for consumers' personal, non-commercial use, and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed accurate by the MLS. Data last updated on 04-03-2025.
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