About This Home

This 4-bedroom, 3-bathroom single family at 1 E Sister Rck Is in Marathon, FL is listed for $16,000,000 ($6,944 per sqft). Built in 2015, the home offers 2,304 sqft of living space on a 6.44 acres lot.

Key Features

  • Built in 2015
  • 6.44 acre lot
  • Private pool
  • Fireplace
  • Waterfront

Property Details

1 story
3 full
2015

Amenities

PoolSolarFireplaceWaterfrontViewA/C
Listing Description

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.

Monthly Cost Estimate

$85,571/mo

20% down · 6.5% · 30 years

Principal$11,571
Interest$69,333
Insurance$4,667

Estimates only. Actual payments may vary.

Location

1 E Sister Rck Is

Marathon, FL 33050

Off Shore Island

Features & Amenities

Interior Features

Built-in FeaturesBedroom on Main LevelCloset CabinetryEat-in KitchenFirst Floor EntryFireplaceLiving/Dining RoomSplit Bedrooms

Exterior Features

DeckFruit TreesSecurity/High Impact DoorsLightingPorchStorm/Security Shutters

Property Details

Flooring

Tile

Construction

Block

Views

Ocean

Pool Features

Pool

Outdoor Features

PorchDeck

Heating

Solar (Heating)

Cooling

Central Air

Appliances

Built-In OvenDryerDishwasherElectric RangeMicrowaveRefrigeratorSolar Hot WaterTrash CompactorWasher

Questions & Answers

This 4-bedroom, 3-bathroom single family at 1 E Sister Rck Is is listed at $16,000,000 ($6,944/sqft). The estimated monthly payment is $85,572 based on 20% down, a 30-year loan at 6.5% interest, estimated insurance.

Key features include: Built in 2015, 6.44 acre lot, Private pool, Fireplace, Waterfront. Interior Features: Built-in Features, Bedroom on Main Level, Closet Cabinetry. Exterior Features: Deck, Fruit Trees, Security/High Impact Doors.

This property is listed by Vladimir Rochebrun and can be reached at 3056905851.

VR

Vladimir Rochebrun

License 3406310

Agent at Compass Florida LLC

(305) 690-5851

Listed by Compass Florida LLC · Broker phone: (305) 851-2820 · View on Broker Site

MLS# A12069701· Source: Miami REALTORS®· 36 days on PropertySimple

Copyright © 2026 Miami REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

1 E Sister Rck Is, Marathon, FL 33050

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