$16,000,000
1 E Sister Rck Island
Marathon, FL 33050
Off Shore Island
Explore the area: Monroe County real estate
Price Check
How this price compares
- List price
- $16,000,000
- Price per sq ft
- $6,944
- Original price
- Unchanged
- Days on market
- 42
This 4-bedroom single-family home is listed at $16,000,000, or $6,944 per square foot. It has been on the market for 42 days.
Estimated monthly payment
$84,087 /mo
Principal and interest only, based on $3,200,000 down (20%), a 6.875% 30-year fixed rate. Property taxes, homeowners insurance are not included.
Customize this estimateListing Snapshot
- Price
- $16,000,000
- Days on Site
- 42 Days
- Bedrooms
- 4
- Total Baths
- 3
- Full Baths
- 3
- Partial Baths
- 0
- Living Area
- 2,304 sqft
- Total Sq Ft
- 5,760 sqft
- Lot Size
- 6.44 Acres
- Year Built
- 2015
- Property Type
- Single Family
- MLS #
- A12069701
- Property Tax
- $25,482 (2025)
- Subdivision
- Off Shore Island
- County
- Monroe
- Status
- Active
- Special Conditions
- Listed As Is
About This Property
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.
MLS media linkGeneral Features
- Property Type
- Single Family
- Status
- Active
- Year Built
- 2015
- Number of Stories
- 1
- Levels
- One
- Garage Spaces
- 0
- Direction Faces
- East
- Lot Size (Acres)
- 6.44
- Living Sq Ft
- 2,304
- Total Sq Ft
- 5,760
- Sewer
- Septic Tank
- Water Source
- Other
- Zoning
- 0S
Interior Features
- Appliances
- Dryer / Dishwasher / Electric Range / Microwave / Oven / Refrigerator / Solar Hot Water / Trash Compactor / Washer
- Cooling
- Central Air
- Heating
- Solar
- Flooring
- Other / Tile
- Fireplace
- Yes
- Interior Features
- Built In Features / Bedroom On Main Level / Closet Cabinetry / Eat In Kitchen / Living Dining Room / Split Bedrooms / Separate Shower
Exterior Features
- Construction
- Block
- Roof
- Metal
- Exterior Features
- Lighting / Outdoor Living Area
- Private Pool
- Yes
- Pool Features
- In Ground
- Patio & Porch
- Deck / Porch / Wrap Around
- Lot Features
- Five To Ten Acres / Fruit Trees
- Waterfront
- Yes
- Waterfront Features
- Navigable Water / No Fixed Bridges / Ocean Access / Ocean Front
- Frontage
- Waterfront
- Frontage Length
- 800.00 ft
- View
- Ocean
Community & HOA
- Association Amenities
- Boating
- Community Features
- Boat Facilities
- Financing Terms
- Cash / Conventional / Other
- Restrictions
- No Restrictions
- MLS Area
- 2980
About the Area
- Homes for Sale
- 61
- Under Contract
- 0
- Median List Price
- $1,087,500
- Median $/Sq Ft
- $659
- Avg Days on Market
- 209
Frequently Asked Questions
- How do I schedule a tour of 1 E Sister Rck Island, Marathon, FL 33050?
- Use the Tour button on this listing to request a showing of 1 E Sister Rck Island, Marathon, FL 33050. Pick a day and time and choose an in-person or video-chat tour, and a Pure Equity agent will confirm your visit, often the same day.
- Is 1 E Sister Rck Island, Marathon, FL 33050 still available?
- 1 E Sister Rck Island, Marathon, FL 33050 is currently listed as Active, and has been on the market 42 days. Status updates directly from the MLS as homes go under contract, so ask us to confirm availability before you plan a visit.
- How much is the monthly payment for 1 E Sister Rck Island, Marathon, FL 33050?
- With 20% down ($3,200,000) on the $16,000,000 list price and a 30-year fixed loan at an illustrative 6.875% rate, the estimated principal & interest for 1 E Sister Rck Island, Marathon, FL 33050 is about $84,087/mo, before property taxes, insurance. Use the payment estimate on this page to adjust the down payment and rate.
- How do I get pre-approved to buy 1 E Sister Rck Island, Marathon, FL 33050?
- Getting pre-approved shows sellers you're a serious buyer and clarifies your true budget before you offer on 1 E Sister Rck Island, Marathon, FL 33050. Contact Pure Equity and we'll connect you with a trusted local lender to review your financing options, no obligation.
- Can I negotiate the price of 1 E Sister Rck Island, Marathon, FL 33050?
- Often, yes. The right offer on 1 E Sister Rck Island, Marathon, FL 33050 depends on how it's priced against comparable single family sales in Marathon, how long it's been listed, and how motivated the seller is. Pure Equity will run the comps and help you craft a competitive, well-supported offer.
Listing courtesy of Compass Florida, LLC
Listing information is provided by BeachesMLS, Inc.and is deemed reliable but not guaranteed accurate by the MLS or Pure Equity. Information is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties. © 2026 BeachesMLS, Inc. Last updated August 30, 2026.
$16,000,000
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Listed by Vladimir Rochebrun, Compass Florida, LLC
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