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99 E Ocean E, Marathon, FL 33050

New Listing

$16,000,000

Virtual Tour

https://www.propertypanorama.com/instaview/mia/A12037474

Property Type: Residential Bedrooms: 4 Baths: 3 Square Footage: 2,304 Status: Active

Current Price: $16,000,000 List Date: 6/15/2026 Last Modified: 6/18/2026

Description

PRIVATE ISLAND INVESTMENT OPPORTUNITY IN THE FLORIDA KEYS! East Sister Rock is a rare, income-producing private island located just ¼ mile offshore from Marathon. Successfully operating as a luxury vacation rental and event venue for over 20 years, this one-of-a-kind property offers an exceptional blend of lifestyle, hospitality, and investment potential. Open to partnership and fractional ownership opportunities. A short boat ride across crystal-clear waters brings you to a self-sustaining tropical retreat featuring a 3BR/2BA main residence, detached guest house, a 100-foot deep-water dock capable of accommodating multiple vessels, helipad, wind and solar power, whole-house generator, and freshwater cistern. Guests enjoy world-class snorkeling, fishing, diving, kitesurfing, and watersports directly from the property. Wake to unobstructed Atlantic sunrises from the wraparound veranda and end each day with spectacular Florida Keys sunsets. Whether seeking a private family compound, luxury rental asset, event destination, or unique investment opportunity, East Sister Rock delivers an unparalleled ownership experience. Visit Floridaisland.com for details.

More Information MLS# A12037474

Contract Information

Comp Sale YN: No Occupant Type: Call Listing Agent Listing Date: 2026-06-15 Status: Active Original List Price: 16000000 List Price: $16,000,000 Current Price: $16,000,000

Location and Legal

County Or Parish: Monroe County Parish Name: Monroe City Name: Marathon Postal Zip: 33050 Geographic Area: Other Flood Zone: VE Country: United States Street Number: 99 Street Direction Prefix: E Street Name: Ocean Street Direction Suffix: E State Or Province: FL Postal Code: 33050 Postal Code +4: 2551 Subdivision Name: Ocean E Area: 5940 - Other Florida County Elementary School: Stanley Switlik Middle Or Junior School: Marathon High School: Coral Shores Parcel Number: 00104670000401 Zoning: is

General Property Information

Adjusted Area Main: 5184 Living Area Main: 2304 Lot Size Dimensions: 1.25 Lot Size Area: 1334 Water Frontage Feet: 500 Senior Community YN: No Outdoor Living Spaces YN: Yes Furnished: Furnished Stories Total: 1 Fireplace YN: Yes Pool Private YN: Yes Spa YN: Yes Guest House YN: Yes Property Sub Type: Single Family Residence Bedrooms Total: 4 Bathrooms Total: 3 Bathrooms Full: 3 Year Built: 1980 Carport YN: 1 Carport Spaces: 4 Covered Spaces: 4 Lot Size Acres: 0.03 Waterfront YN: 1 Direction Faces: North

Financial Information

Membership Fee Required YN: No Association Fee: 500 Association Fee Frequency: Annually Tax Annual Amount: 16899 Tax Year: 2025 Tax Legal Description: 14 66 32 BOOT KEY (AKA UNRECORDED OCEAN EAST INC REV SURVEY 4-14-75 PT LOT 1) OR555-203 OR589-894 OR772-1173 OR983-1569 OR1364-739 OR1547-23

Office/Member Information

DXORIGMLSID: SEF

Amenities

Street Lights: 1

Association Amenities

Gated: 1

Dining Area

Eat-In Kitchen: 1 Family/Dining Combination: 1 Florida/Dining Combination: 1 Kitchen Dining: 1 Snack Bar/Counter: 1

Electric

Circuit Breakers: 1

Entry Information

Entry Level: 1

Exterior Features

Barbecue: 1 Outdoor Shower: 1

Flooring

Vinyl: 1

Guest House Area Details

Living Area Guest House: 600

Guest House Features

1 Bath: 1 1 Bedrooms: 1 Kitchen: 1 Living Room: 1

Parking Features

Driveway: 1

Property Condition

Updated/Remodeled: 1

Spa Features

Fiberglass: 1

Other Structures

Outbuilding: 1

Possession

Close Of Escrow: 1 Negotiable: 1

Sewer

Septic Tank: 1

Special Information

Sold As-Is: 1

Utilities

Cable Not Available: 1

View

Water: 1

Heating

Central: 1 Window/Wall: 1

Water Access

No Fixed Bridge: 1

Water View

Direct Ocean: 1 Ocean: 1

Appliances

Dishwasher: 1 Dryer: 1 Gas Range: 1 Ice Maker: 1 Microwave: 1 Refrigerator: 1 Solar Hot Water: 1 Washer: 1 Water Purifier: 1

Construction Materials

CBS: 1

Green Energy Efficient

Appliances: 1 Construction: 1 Doors: 1 HVAC: 1 Water Heater: 1

Interior Features

Bar: 1 Closet Cabinetry: 1 High Ceilings: 1 Pantry: 1

Levels

One: 1

Listing Terms

Cash: 1 Conventional: 1 Cryptocurrency: 1 Owner Will Carry: 1

Other Equipment

Fuel Tank(s): 1 Satellite Dish: 1

Pool Features

Fiberglass: 1 In Ground: 1

Road Frontage Type

Private Road: 1

Road Surface Type

Paved: 1

Roof

Aluminum: 1

Security Features

Fire Alarm: 1 Smoke Detector(s): 1

Water Source

Other: 1

Waterfront Features

Ocean Front: 1

Water Heater Details

Electric Water Heater: 1 Gas Water Heater: 1

Boat and Dock Information

Dock: Yes

Boat and Dock Features

Deeded Dock: 1 Private Dock: 1

Cooling

Central Air: 1 Wall/Window Unit(s): 1

Association Type

Homeowner Association: 1

Showing Requirements

Appointment Only: 1

Master Bedroom/Bath

Bedroom On Entry Level: 1 Dual Sinks: 1 Separate Shower: 1

Pets Allowed YN

Yes: 1

Pool Size Details

Pool Size (WxL): 10x42

Restrictions

See Remarks: 1

Storm Protection

Accordian Shutters: Complete Impact Glass: Complete Permanent Generator: Whole House

Tax Information

City/County: 1 Other Exemption: 1

Outdoor Living Spaces

Deck: 1 Porch: 1

Porch Details

Porch - Wrap Around: 1

Price Calculations

Current Price To SqFt: 6944.44

Section Details

Parcel Number MLX: 5590

Acreage Description

1 To Less Than 2 Acre Lot: 1

Status Change Information

Major Change Timestamp: 2026-06-15T04:00:00Z Major Change Type: New Listing Status Change Date: 2026-06-18

Originating Details

Originating System Key: 513832185 Originating System ID: M00000151

Property Features

Association Amenities: Gated Dining Area: Eat-In Kitchen; Family/Dining Combination; Florida/Dining Combination; Kitchen Dining; Snack Bar/Counter Electric: Circuit Breakers Exterior Features: Barbecue; Outdoor Shower Flooring: Vinyl Guest House Features: 1 Bath; 1 Bedrooms; Kitchen; Living Room Parking Features: Driveway Property Condition: Updated/Remodeled Spa Features: Fiberglass Appliances: Dishwasher; Dryer; Gas Range; Ice Maker; Microwave; Refrigerator; Solar Hot Water; Washer; Water Purifier Water Heater Details: Electric Water Heater; Gas Water Heater Boat and Dock Features: Deeded Dock; Private Dock Construction Materials: CBS Cooling: Central Air; Wall/Window Unit(s) Association Type: Homeowner Association Green Energy Efficient: Appliances; Construction; Doors; HVAC; Water Heater Heating: Central; Window/Wall Interior Features: Bar; Closet Cabinetry; High Ceilings; Pantry Levels: One Listing Terms: Cash; Conventional; Cryptocurrency; Owner Will Carry Other Equipment: Fuel Tank(s); Satellite Dish Other Structures: Outbuilding Pets Allowed YN: Yes Pool Features: Fiberglass; In Ground Possession: Close Of Escrow; Negotiable Restrictions: See Remarks Road Frontage Type: Private Road Road Surface Type: Paved Roof: Aluminum Security Features: Fire Alarm; Smoke Detector(s) Sewer: Septic Tank Special Information: Sold As-Is Tax Information: City/County; Other Exemption Utilities: Cable Not Available View: Water Water Access: No Fixed Bridge Water Source: Other Water View: Direct Ocean; Ocean Waterfront Features: Ocean Front Showing Requirements: Appointment Only Outdoor Living Spaces: Deck; Porch Porch Details: Porch - Wrap Around Acreage Description: 1 To Less Than 2 Acre Lot

Listing Office: Frank Taylor Real Estate Inc

Last Updated: June - 18 - 2026

99 E Ocean E, Marathon, FL 33050- MLS# A12037474

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