Active
4 beds2,304 sqft$6,944/sqft
1 E Sister Rck, Marathon, FL 33050
Est: $83,450/moGet pre-approved
Single FamilyProperty Type
6.44 acresLot Size
2015Year Built
$6,944/sq ftPrice per sq ft

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...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
23 days on Market
  • Listed by: Vladimir Rochebrun 305.905.2559 vladestates@gmail.com • Compass Florida, LLC
  • Listed by: Aaron Rosenthal 954.249.3178 aaron@thechadcarrollgroup.com • Compass Florida, LLC
Last updated: 08/27/2026 01:06 AM • Source: MCRTC, MLS#: A12069701

Location

Listing Courtesy of Compass Florida, LLC
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$83,450 per month

30 year fixed, 6.55% Interest

Principal and Interest

$81,326

Property Taxes

$2,124

HOA Dues

$0

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Property Information for 1 East Sister Rck

Property Details
  • Taxes: $25,482 / year
  • MLS Type: Residential / Detached
  • Subdivision Name: Off Shore Island
  • View: Ocean
  • Waterfront Features: Navigable Water, Ocean Access, Ocean Front
  • Waterfront: Yes
Building Information
  • Year Built: 2015
  • Lot Size: 6.44 AC / 280,628 SF
Summary
Location and General Information
  • Direction Faces: East
  • Community Features: Boat Facilities, Dock
  • Postal City: Marathon
  • County Or Parish: Monroe
  • Zoning Description: 0S
  • View: Yes
Parking
  • Parking Features: Off Site
Taxes and HOA Information
  • Tax Legal Description: 23 66 32 LOT 2 (US PATENT 1186533) EAST SISTER ROCK AND ADJACENT BAY BOTTOM G71-513(II DEED 20369) OR374-139/40 OR752-16
  • Tax Year: 2025
  • Tax Annual Amount: $25,482.00
Virtual Tour
Property
Lot Information
  • Building Area Total: 5,760.00
  • Living Area: 2304.0
  • Lot Size Dimensions: 280628
  • Lot Size Square Feet: 280628.0
  • Lot Size Units: Acres
  • Parcel Number: 00105590-000000
  • Lot Size Range: 5 to <10 Acres
Property and Assessments
  • Development Name: Off Shore Island
  • Construction Materials: Block, Concrete
  • Property Attached: No
  • Property Type: Residential
  • Property Sub Type: Detached
  • Senior Community: No
  • Year Built: 2015
Utilities
  • Utilities: Other, Septic Available
Interior and Exterior Features
Exterior Features
  • Exterior Features: Deck, Fruit Trees, Porch, Storm Security Shutters
  • Patio And Porch Features: Deck, Open, Porch, Wrap Around
  • Pool Features: In Ground
  • Pool Private: Yes
  • Roof: Metal
Interior Features
  • Fireplace: Yes
  • Flooring: Other
  • Interior Features: Built In Features, Closet Cabinetry, Eat In Kitchen, Fireplace, Living Dining Room
  • Appliances: Built In Oven, Dryer, Dishwasher, Electric Range, Microwave, Refrigerator, Solar Hot Water, Washer
  • Cooling: Central Air
  • Cooling: Yes
  • Heating: Solar
  • Heating: Yes
  • Guest House Description: 1 Bath,Efficiency,Kitchen,Living Room
  • Bathrooms Full: 3
  • Bathrooms Total Integer: 3
  • Bedrooms Total: 4
Multi Family
Multi Family Information
  • Unit Location: ,
Rental
Rent Information
  • Lease Considered: No

Property History for 1 East Sister Rck

DateEvent & SourcePriceAppreciation
Aug 12, 2026

Listed (Active)

MCRTC #A12069701

$16,000,000
DateEvent & SourcePrice
08/12/2026

Listed (Active)

MCRTC #A12069701

$16,000,000

For completeness, we often displays two records for one sale: the MLS record and the public record.

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1 East Sister Rck is a single family home for sale in Marathon, FL 33050. This property was listed for sale on August 12, 2026 by Compass Florida, LLC, it's currently listed at $16,000,000. 1 East Sister Rck is a 4-bed, 3-bath, 2,304 sqft single family home built in 2015.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the seller's discretion. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties make no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of Compass Florida, LLC

Based on information from one of the following Multiple Listing Services: Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS®. Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by Beaches Multiple Listing Service, Inc., Martin County REALTORS® of the Treasure Coast, Inc., Miami Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.