Single-family home for sale

$16,000,000

1 E Sister Rck IsMarathon, FL 33050

  • 4 Beds
  • 3 Baths
  • 2,304 Sq ft
  • 280,628 Lot sq ft
  • 2015 Built

About this home

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.

Details

MLS #
A12069701
Property type
Single-family home
Status
Active
Days on market
34
Neighborhood
Off Shore Island
County
Monroe County
Property taxes
$25,482 (2025)
Waterfront
Yes
Private pool
No
View
Ocean, Direct Ocean
Cooling
Central Air
Interior features
First Floor Entry, Built-in Features, Closet Cabinetry, 3 Bedroom Split, Family Room
Exterior features
Lighting, Fruit Trees
Appliances
Dishwasher, Dryer, Electric Range, Microwave, Other Equipment/Appliances, Refrigerator, Solar Hot Water, Trash Compactor, Wall Oven, Washer

Location

Estimated payment

$83,028/mo with 20% down at 6.5% for 30 years, including taxes, before insurance.

Adjust in the mortgage calculator

Listing courtesy of Compass Florida, LLC · Vladimir Rochebrun. Listing last updated September 15, 2026 5:18 PM.

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The multiple listing information is provided by the MIAMI Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are © 2026 MIAMI Association of REALTORS®. All rights reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Data last updated October 26, 2026 9:23 AM.

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