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Harbor Isle Homes for Sale, Marathon, Florida Keys

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Total Listings 6
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$699,000
Marathon
Harbor Isle - MM: 48.50
2 Bed, 2 Baths, 864 SqFt Days Listed: 66
-12.08% ($96,000) 2 Price Changes : Last Change 6 Days Ago
Mobile Home - Active - Waterfront Yes
Side of Island: Ocean - Dockage: Boat Lift65ft.

Boot Key Harbor licensed 7 day vacation rental two bedroom home is packed with premium features inside and out. Being sold rental ready, start making money now! All windows, the sliding glass door, and front door are storm-rated with double-pane glass, complemented by custom Bahama shutters. Outside, enjoy lush landscaping with banana-producing plants, an integrated sprinkler system for planters, and a spacious front parking area. The backyard is a boaters paradise, with a 65-ft concrete dock and seawall, an 8,000 lb boat lift (regularly serviced) with a brand new Gem Control Box and remote, plus a brand-new extended courtesy dock and step-off boarding ladder. Relax under the tiki hut with black granite top, fan, and string lights, grill your catch on the propane BBQ, and clean your fish at the stainless steel table. Additional outdoor perks include an enclosed shower with hot/cold water, antique ships bell by the back door, bait freezer, extra-wide stairs with custom stainless handrails, and two lockable storage units. Inside, enjoy warm cedar-lined accents in the foyer, living room, and guest bedroom, with white pine siding and full insulation throughout. Modern upgrades include a Ring Alarm system with a hardwired front camera and five CO2/smoke detectors, smart TVs in all three rooms, and ceiling fans in the bedrooms and kitchen. The spacious laundry room includes a new washing machine with a removable agitator and both interior and exterior access. The kitchen is equipped with a propane gas stove, new microwave with exterior vent, refrigerator with ice maker, and a 30-gallon water heater. Each bedroom features an egress window for added safety, and the half-bath is accented with a charming, authentic ships porthole mirror. Located in Boot Key Harbor, one of the Florida Keys premier boating destinations, youll have quick, deep water access to both the Atlantic Ocean and the Gulf of Mexico.

$775,000
Marathon
Harbor Isle - MM: 48.50
2 Bed, 2 Baths, 1,152 SqFt Days Listed: 108
-8.72% ($74,000) 1 Price Change : Last Change 2 Days Ago
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!

$775,000
Marathon
Harbor Isle - MM: 48.50
2 Bed, 2 Baths, 1,152 SqFt Days Listed: 91
-8.72% ($74,000) 1 Price Change : Last Change 3 Days Ago
Mobile Home - 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!

$897,900
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,320 SqFt Days Listed: 56
Mobile Home - Active - Waterfront Yes
Side of Island: Ocean - Dockage: Assigned Dock

This beautifully remodeled 3/3 home in the Marathon Keys offers stunning waterfront living with direct ocean access. Featuring a boat lift, its perfect for boating enthusiasts. The tastefully updated, turnkey property is ready for immediate move-in, offering a perfect blend of comfort and coastal charm. All new Appliances, Property has 2 a/c Systems, Termite Treatment 2024, Dont miss out on this rare opportunity to own a slice of paradise!

$949,000
Marathon
Harbor Isle - MM: 48.50
3 Bed, 3 Baths, 1,152 SqFt Days Listed: 192
Mobile Home - Active - 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.

$2,749,000
Marathon
Harbor Isle - MM: 48.50
5 Bed, 5 Baths, 3,200 SqFt Days Listed: 119
-1.65% ($46,000) 2 Price Changes : 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 - (16) - Harbor Isle as of 2025-06-15
Sale Date Address Sale Price $/SF List Price Sq. Ft. Type Bd/Ba Days Listed
05-20-2025 835 25Th $775,000 $605 $825,000 1,279 Mobile Home 3/2 163
05-08-2025 491 James $599,000 $575 $599,000 1,040 Single Family 3/2 38
05-02-2025 605 26th Street Ocean $720,000 $571 $749,000 1,260 Single Family 3/2 192
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
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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 06-15-2025.
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