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1 E Sister Rck Island, Marathon, FL 33050
$16,000,000
Property Type:
Residential
Bedrooms:
4
Baths:
3
Square Footage:
5,760
Status:
Active
Current Price:
$16,000,000
List Date:
8/12/2026
Last Modified:
9/10/2026
Overview
Description
...
(Read more)
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.
Listing Details MLS# A12069701
General Property Information
- Property Sub Type
- Single Family Residence
- Bedrooms Total
- 4
- Bathrooms Total
- 3
- Bathrooms Full
- 3
- Building Area Main
- 5760
- Living Area Main
- 2304
- Adjusted Area Main
- 2880
- Year Built
- 2015
- Lot Size Area
- 280628
- Lot Size Acres
- 6.44
- Senior Community YN
- No
- Guest House YN
- Yes
- Waterfront YN
- Yes
- Water Frontage Feet
- 800
- Outdoor Living Spaces YN
- Yes
- Stories Total
- Yes
- Direction Faces
- East
- Fireplace YN
- Yes
- Pool Private YN
- Yes
Property Features
Dining Area:
Dining/Living Room; Eat-In Kitchen
Exterior Features:
Lighting
Flooring:
Tile; Other
Guest House Features:
1 Bath; Efficiency; Kitchen; Living Room
Appliances:
Dishwasher; Dryer; Electric Range; Microwave; Oven; Refrigerator; Solar Hot Water; Trash Compactor; Washer; Other
Boat and Dock Features:
Deeded Dock; Private Dock
Construction Materials:
Block
Cooling:
Central Air
Heating:
Solar
Interior Features:
Bedroom Layout - Three Way Split; Built-in Features; Closet Cabinetry
Levels:
One
Listing Terms:
Cash; Conventional; Other
Lot Features:
Fruit Tree(s)
Other Equipment:
Satellite Dish; Other
Pool Features:
In Ground
Possession:
Negotiable
Restrictions:
No Restrictions
Roof:
Metal
Sewer:
Septic Tank
Special Information:
Sold As-Is
Tax Information:
City/County
Water Access:
No Fixed Bridge; Ocean Access
Water Source:
Other
Water View:
Direct Ocean; Ocean
Waterfront Features:
Navigable Water; Ocean Front
Showing Requirements:
Appointment Only; Call Listing Agent
Outdoor Living Spaces:
Deck; Porch
Porch Details:
Porch - Open; Porch - Wrap Around
Room Types:
Family Room
Acreage Description:
5 To Less Than 10 Acre Lot
Contract Information
- Comp Sale YN
- No
- Original List Price
- 16000000
- Occupant Type
- Call Listing Agent
Location and Legal
- Country
- United States
- County Or Parish
- Monroe
- County Parish Name
- Monroe
- Street Number
- Yes
- Street Direction Prefix
- E
- Street Name
- Sister Rck
- Street Suffix
- Island
- City Name
- Marathon
- State Or Province
- FL
- Postal Code
- 33050
- Postal Zip
- 33050
- Subdivision Name
- Off Shore Island
- Area
- 2980
- Geographic Area
- Other
- Parcel Number
- 00105590000000
- Zoning
- 0S
- Flood Zone
- VE
Financial Information
- Membership Fee Required YN
- No
- Tax Annual Amount
- 25482
- Tax Year
- 2025
- 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 OR752-1640 OR752-1642 OR755-
Status Change Information
- Major Change Timestamp
- 2026-08-12T04:00:00Z
- Major Change Type
- New Listing
- Status Change Date
- 2026-08-12
More Information
Entry Information
- Entry Level
- Yes
Boat and Dock Information
- Dock
- Yes
Pool Size Details
- Pool Size (WxL)
- 16x39
Storm Protection
- Impact Glass
- Complete
Price Calculations
- Current Price To SqFt
- 6944.44
Section Details
- Parcel Number MLX
- 0010
Originating Details
- Originating System Key
- 548040636
- Originating System ID
- M00000151
Room Information
| Room Name |
|---|
| Family Room |
Listing Office:
Compass Florida, LLC
Last Updated: September - 10 - 2026
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. Copyright 2026 Beaches Multiple Listing Service, Inc. All rights reserved. Information Not Guaranteed and Must Be Confirmed by End User. Site contains live data.
Contact Information
AMY STARK SNOOK
REALTOR®
NOREEN PAYNE
REALTOR®
PAIGE MERCADO DIRECTOR OF CLIENT RELATIONS
Phone | 561-571-2289
Amy and Noreen Team
Lang Realty

