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Land with Home for Sale in Marathon, Florida

1 E Sister RCK Is, Marathon, FL 33050

$16,000,000
6.44 acres
Active sale
ago
Est $83,872/mo

Own an entire private island in the Florida Keys, just 1/4 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 spa, tropical landscaping, outdoor entertaining areas, and a 100-ft deep-water dock. Self-sufficient infrastructure includes solar and wind power, battery storage, backup generator, desalination system and freshwater cistern capacity. Private helipad provides additional access. Seller is open to select Joint Venture opportunities.

2,304
Sq feet
4
Beds
3
Full baths
2015
Built

Location

Street address
1 E Sister RCK Is
Zip code
33050
Community
Off Shore Island

Property details

Acreage
6.442 acres
Zoning
0S
MLS #
MAOR A12069701
Posted

Property taxes

2025
$25,482

Parcels

  • 00105590-000000

Legal description

Details and features

Listing

Type
Residential
Subtype
Single Family Residence

Lot

View
Ocean
Waterfront
Navigable Water, Ocean Access, Ocean Front
Features
5-10 Acres

Exterior

Pool
Deck, Porch
Structures
Guest House
Features
Fruit Trees, Lighting, Security/High Impact Doors, Storm/Security Shutters

Structure

Stories
1
Sewer
Septic Tank
Heating
Solar
Cooling
Central Air
Materials
Block
Roof
Metal

Interior

Rooms
Bathroom x 3, Bedroom x 4, Dining Room
Flooring
Tile
Fireplaces
Yes
Appliances
Built-In Oven, Dishwasher, Dryer, Electric Range, Microwave, Refrigerator, Solar Hot Water, Trash Compactor, Washer
Security
Security
Features
Bedroom On Main Level, Built-In Features, Closet Cabinetry, Eat-In Kitchen, Fireplace, First Floor Entry, Living/Dining Room, Split Bedrooms

Property utilities

CategoryTypeStatus
PowerSolarConnected

Listing history

DateEventPriceChangeSource
Aug 12, 2026New listing$16,000,000MAOR
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This 6.442-acre property is located at 1 E Sister RCK Is in Marathon, FL 33050. The property is available for sale, priced at $16,000,000. It has a 2,304 square foot 4-bedroom, 3-bath house built in 2015.

Listed by Compass Florida, (305) 851-2820

Checked 1 hour agoUpdated Source

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