Current MLS Property Details
1 E Sister Rck Island, Marathon, FL 33050
Marathon, FL, 33050
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MLS # A12069701
At a Glance
Property Snapshot
The MLS currently describes this as a 4 bedrooms, 3 bathrooms, 2,304 square feet, built in 2,015.
What Stands Out
Waterfront property
Private pool
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.
Property Details
Property Type
Single Family Residence
Subdivision
Off Shore Island
Development
Off Shore Island
County
Monroe
Waterfront
Yes
Private Pool
Yes
Original List Price
$16,000,000
MLS ID
A12069701
Updated
Sep 15, 2026
Quick Payment Estimate
What might this home cost each month?
Starting rate:
6.66%
30 year fixed national average
· updated Aug. 27, 2026
$
%
%
$
/mo
Taxes, insurance, flood coverage and PMI are not included here.
Rate is editable and is not a lender quote.
Listing Office:
Compass Florida, LLC
• 305-851-2820
Listing Agent:
Vladimir Rochebrun
• 305-690-5851
MLS ID:
A12069701
Property information is displayed from the site's BeachesMLS IDX data feed.
Information is subject to change and should be independently verified.
Property Location
Where is this property?
1 E Sister Rck Island, Marathon, FL 33050 · Marathon, FL, 33050
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