1 E Sister Rck Island
Marathon, FL 33050
4
Bed
3
Bath
2,304Sqft
280,628Sqft(Lot)
Own an entire private island in the Florida Keys, just ¼ mile offshore from Marathon! East Sister Rock Island offers extraordinary privacy surrounded by turquoise waters, yet is only minutes from the mainland. The property encompasses approx. 6.5 acres, including approx. 5.8 acres of surrounding seabed, creating an exceptional marine setting for snorkeling, swimming, kayaking, paddleboarding, fishing and watersports. The beautifully updated 3-bedroom, 2-bath main residence and detached guest house offer over 5,000 total SF of living and entertaining space. Recent renovations include an updated kitchen with gorgeous countertops and modern finishes. A 12-ft-wide wraparound veranda captures panoramic water views, sunrises and spectacular Keys sunsets. Amenities include a waterfront pool and s
Property Details
Map
Map
What's Nearby
Nearby Areas
Features
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Bedroom Information
Total beds: 4Bathroom Information
Total Baths: 3 Full Baths: 3Room Information
Rooms Total: 1Roofing Information
MetalFlooring Information
Other, Tile -
Interior Features
BuiltInFeatures, BedroomOnMainLevel, ClosetCabinetry, EatInKitchen, LivingDiningRoom, SplitBedrooms, SeparateShowerRoof: MetalAppliances: Dryer, Dishwasher, ElectricRange, Microwave, Oven, Refrigerator, SolarHotWater, TrashCompactor, Washer -
Heating & Cooling
Has Heating: Yes Heating: Solar Has Cooling: Yes Cooling: CentralAir Water front: 1
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Building Information
Year Built: 2015Building Area Total: 5760Construction Materials: BlockStories: 1Frontage Length: 800.00Patio And Porch Features: Deck, Porch, WrapAroundPool Features: InGroundPrivate Pool: YesWater front Features: NavigableWater,NoFixedBridges,OceanAccess,OceanFrontView: Ocean -
Exterior Features
Exterior Features: Lighting, OutdoorLivingArea
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Lot Information
Main Square Feet: 280628 Lot Size Acres: 6.44 Lot Description: FiveToTenAcres,FruitTreesProperty Information
Subdivision: Off Shore Island Source Property Type: Residential Property SubType: Single Family Residence Direction Faces: East Levels: One Property Age: 11
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Listing Price Information
Listing Price: $16000000Cash, Conventional, Other
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Tax Information
Parcel Number: 00105590000000 Tax Year: 2025 Annual Tax: $25482 Tax Legal Desc: 23 66 32 LOT 2 (US PATENT 1186533) EAST SISTER ROCK AND ADJACENT BAY BOTTOM G71-513(II DEED 20369) OR374-139/40 OR752-1640 OR752-1642 OR755-
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Homeowners Association Information
Association Amenities: BoatingCommunity Features: BoatFacilities
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Location Information
WaterSource: Other
How much is this property worth?
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Nearby Home Value
| Address | Estimate | Bed | Bath | Sq. Ft | Lot Size |
|---|---|---|---|---|---|
| 915 80th Street, Marathon, FL, 33050 | $775,000 | 3 | 2 | 1,296 | 1,296 SqFt |
| 837 91st Court Ocean, Marathon, FL, 33050 | $760,000 | 2 | 2 | 1,296 | 1,296 SqFt |
| 59761 Overseas Highway .., Marathon, FL, 33050 | $699,000 | 2 | 2 | 1,496 | 1,496 SqFt |
| 59720 Overseas Highway .., Marathon, FL, 33050 | $3,400,000 | 5 | 5 | 3,013 | 3,013 SqFt |
| 59720 Overseas Highway .., Marathon, FL, 33050 | $3,100,000 | 5 | 5 | 3,013 | 3,013 SqFt |
| 59720 Overseas Highway .., Marathon, FL, 33050 | $2,975,000 | 5 | 5 | 3,013 | 3,013 SqFt |
| 59720 Overseas Highway .., Marathon, FL, 33050 | $3,500,000 | 4 | 5 | 3,013 | 3,013 SqFt |
| 59733 Paradise Place, Marathon, FL, 33050 | $700,000 | 4 | 2 | 1,447 | 1,447 SqFt |
| 91 Dorsett Drive DRIVE, Marathon, FL, 33050 | $787,000 | 2 | 2 | 1,200 | 1,200 SqFt |
| 58950 Overseas Highway .., Marathon, FL, 33050 | $850,000 | 3 | 2 | 1,509 | 1,509 SqFt |
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ByOwner last updated this listing 08/24/2026 @ 22:29
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