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

1 E Sister Rock Island,MARATHON, FL 33050

MARATHON, FL 33050

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Description

Own an entire private island in the heart of the Florida Keys. Located just ¼ mile offshore from Marathon, East Sister Rock Island offers extraordinary privacy surrounded by turquoise waters, yet remains only minutes from the mainland. The property encompasses approximately 6.5 acres, including approximately 5.8 acres of surrounding seabed that create an exceptional marine setting for snorkeling, swimming, kayaking, paddle boarding, fishing and exploring the crystal-clear waters of the Keys. At the center of the island is a beautifully updated 3-bedroom, 2-bath main residence with a detached guest house, offering over 5,000 total SF of living and entertaining space. Recent interior renovations include a beautifully updated kitchen with gorgeous countertops and modern finishes. A 12-foot-wide wraparound veranda captures panoramic water views, Atlantic sunrises and spectacular Florida Keys sunsets. Designed for the ultimate island lifestyle, the property features a waterfront pool and spa, tropical landscaping, multiple outdoor lounging and dining areas, and a 100-foot deep-water dock with ample dockage. World-class fishing, diving, snorkeling, boating and water-sports begin just outside your door. East Sister Rock is equipped for self-sufficient island living with solar and wind power, battery storage, backup generator, desalination system and substantial freshwater cistern capacity. A private helipad provides an additional point of access. Few properties offer this combination of privacy, accessibility, marine surroundings and established island infrastructure. Seller is also open to exploring select Joint Venture opportunities. Note the sale includes 99 E Ocean Drive on the mainland which has a private dock space.

Details

MLS #620952
Listing TypeFor Sale
StyleHouse
Sub-TypeResale
StatusActive
Year1980
Days On Site9
Listing Provided ByCompass Florida, LLC | Vladimir Rochebrun

Features

Bed(s)4
Bath(s) 3 Total
SQ Feet2,304
PoolYes
ZoningRM-1 - Residential Medium - 1
Acreage6.44
Water FrontYes
Property ViewOpen Water View, Ocean

Taxes

Property25481

Area Information

StateFL
CountyMonroe
CityMARATHON
Zip Code33050
Area14 Sombrero Area
Community NameMisc Sombrero Area (50.0)
Listing VS Median (in Misc Sombrero Area (50.0))
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:
9
low | high
Med:
9
100% of Average
Sourced by Back At You

Market Activity 33050

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Learn More About This Property

StateFL
CountyMonroe
CityMARATHON
Zip Code33050
Area14 Sombrero Area
Community NameMisc Sombrero Area (50.0)
Listing VS Median (in Misc Sombrero Area (50.0))
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:
9
low | high
Med:
9
100% of Average
Sourced by Back At You
Nearby Listings (Within 1/2 mile)
Price: $12M - $20M
sqft: 1,500 - 2,500
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64 Tingler Lane Property Photo 1
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64 Tingler Lane
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Listing Updated: August 13, 2026 at 3:37:28 PM PDT
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