$16,000,000
 $85,891 est/mo Sourced by Back At You

1 E Sister Rck Island,Marathon, FL 33050

Marathon, FL 33050

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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 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
Listing TypeFor Sale
StyleHouse
Sub-TypeResale
StatusActive
Year2015
Days On Site87
Listing Provided ByCompass Florida, LLC | Vladimir Rochebrun

Features

Bed(s)4
Bath(s) 3 Total
SQ Feet2,304
PoolYes
Story(s)1
Zoning0S
Acreage6.44
Water FrontYes
Property ViewYes

Exterior

Lot FeaturesFive To Ten Acres, Fruit Trees

Parking

Garage Yes / NoNo

Taxes

Tax Annual Amount25482

Location

Community FeaturesBoat Facilities

Area Information

StateFL
CountyMonroe
CityMarathon
Zip Code33050
Area2980
SubareaOther
Community NameOff Shore Island
Listing VS Median (in Off Shore Island)
Price:
$16,000,000
low | high
Med:
$16,000,000
50% of Average
sqft:
2,304
low | high
Med:
2,304
50% of Average
$ / sqft:
$6,944
low | high
Med:
$6,944
50% of Average
On site:
87
low | high
Med:
87
100% of Average
Sourced by Back At You

Market Activity 33050

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Contact

Learn More About This Property

Susan Oyer

Susan Oyer

Coldwell Banker Premium Realty

SL3501661SRES (561) 736-1251susanoyercbpr@gmail.com
StateFL
CountyMonroe
CityMarathon
Zip Code33050
Area2980
SubareaOther
Community NameOff Shore Island
Listing VS Median (in Off Shore Island)
Price:
$16,000,000
low | high
Med:
$16,000,000
50% of Average
sqft:
2,304
low | high
Med:
2,304
50% of Average
$ / sqft:
$6,944
low | high
Med:
$6,944
50% of Average
On site:
87
low | high
Med:
87
100% of Average
Sourced by Back At You
Listing Updated: October 30, 2026 at 2:17:52 PM PDT
Susan Oyer
SRES
License #: SL3501661
(561) 736-1251
Coldwell Banker Premium Realty
406 Lucerne Ave
Lake Worth Beach, FL 33460

Susan Oyer - Coldwell Banker Premium Realty