1 E Sister Rck Is, Marathon, Florida 33050
1/25

$16,000,000 USD

Single Family Home for Sale, 1 E Sister Rck Is, Marathon, Florida 33050

  • MLS#A12069701
  • 4
  • 3
  • 214 m² (2,304 ft²)

Listed By Compass Florida, LLC

The Single Family Home for Sale located at 1 E Sister Rck Is, Marathon, Florida 33050 is currently for sale. 1 E Sister Rck Is, Marathon, Florida 33050 is listed for $16,000,000. This property has 4 bedrooms, 3 bathrooms.

Date Updated : Aug 19, 2026

Property features

Property

  • Property size: 214 m² (2,304 ft²)
  • Features: DeckExterior LightingFireplace
  • Location: Ocean AccessWaterfrontWater AccessSubdivision

Lot/Land

  • Land/Lot size: 26,071 m² (280,628 ft²)
  • Water frontage: 23 m²
  • Local zoning: Zoning

Construction

  • Year built: 2015
  • Roofing: Metal
  • Construction: Concrete/Block

Bedrooms

  • Bedrooms: 4

Bathrooms

  • Total bathrooms: 3
  • Full bathrooms: 3

Interior Features

  • Windows: Hurricane Shutters
  • Floors: Tile

Exterior Features

  • Outdoor spaces: Deck
  • Carport spaces:

Pool and Spa

  • Pool: Inground

Water and Boating

  • Water: Ocean Front
  • Boating: NavigablePrivate Dock

Recreational

  • Recreational: Swimming Pool

View

  • Features: Ocean ViewOcean Direct

Heating and Cooling

  • Heating system: Solar
  • Hot water service: Solar Water Heater
  • Cooling system: Central AC

Utilities

  • Other utilities: Septic Tank

Description

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 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.

Location

1 E Sister Rck Is, Marathon, Florida 33050

1 E Sister Rck Is, Marathon, Florida 33050