Waterfront
Address
1 E Sister Rock Island, Marathon, FL
Price
$ 16,000,000
Property Attributes
- MLS#620952
- TypeSingle Family
- Listing Status Active
- CountyMONROE
- CityMarathon
- AreaSombrero Area
- NeighborhoodMisc Sombrero Area
- Zip33050
- StyleOff Shore Island
- Year Built1980
- Taxes$ 25481
- Price$ 16,000,000
- Bedrooms4
- Full Bathrooms3
- Half Bathrooms0
- Sqr Footage2304
- Lot Size6.44 Acres
Data Source:
Florida Keys MLS (FLKMLS)
Property Description
Own an entire private island in the heart of the Florida Keys. Located just 1/4 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.
| Price History | |
|---|---|
| 8/12/2026 | Listed $16,000,000 |
General Features
| Living Area | 2304.00 |
|---|---|
| Construction | CBS,Concrete |
| Utilities | Septic Tank,Solar Power,Satellite Dish,Whole House Generatr |
| Roof | Metal Roof |
| Appliances | Washer,Stainless Steel Appliance(s),Microwave,Oven,Range,Refrigerator,Dishwasher,Dryer |
| Zoning | RM-1 - Residential Medium - 1 |
| HOA Fee | 0.00 |
| Pets Allowed Y/N | Pets Allowed |
| Status | Active |
| Full Baths | 3 |
| Year Built | 1980 |
| Subdivision | Misc Sombrero Area (50.0) |
| Style | Off Shore Island |
| View | Ocean View,Open Water View |
| Property Type | A |
| Fee Includes | None |
| Acres | 6.44 |
| Lot Sqft | 280526.00 |
| Rental Allowed | Yes |
| Building Style: Above Flood | Unknown |
| Building Style: Stories | 1 Story |
| Control Depth | 3 |
| Dockage: Dock | Wood |
| Dockage: Dock Length | 100 |
| License Info: Transient Rntl Licns | Yes |
Interior Features
| Interior Amenities | Built-in Cabinets,Bar,Walk-in Closet(s),Granite Counter Top |
|---|---|
| Flooring | Tile,Wood |
Exterior Features
| Exterior Amenities | Detached Guest Qtrs |
|---|---|
| Pool | Yes |
| Waterfront | Oceanfront |
| Lot Size | X |
| Land Size | 5 Less Than 10 Acres |
| Pool Info | In Ground,Decked |
| Porch/Balcony | Open Porch/Balcony,Deck |
| Public Sewer Hookup | No |
| Shutters | Accordion |
| Side | Ocean |
| Windows/Doors | Impact Rstnce Window |
Amenities
- Foreclosure
- Views
- Short Sale
- New Construction
- Adult 55+
- Lease To Own
- No HOA Fees
- Furnished
- Primary On Main
- Air Conditioning
- Seller Finance
- Green
- Fixer Upper
- Horse
- Golf
- Fireplace
- Deck
- Garage
- Basement
- Pool
Property vs Single Family Average in 33050
Price
Taxes
Year Built
Visits
Copyright © MFRMLS.com All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information on this site was last updated Last updated on September 23, 2026 5:07 AM UTC The listing information on this page last changed on Last updated on September 23, 2026 5:07 AM UTCd. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of MFR MLS.
All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Updated on September 23, 2026 5:07 AM UTC
Copyright Southeast Florida Multiple Listing Service © 2026. Accuracy of listing information is not guaranteed. Listing information is provided for personal consumer, non-commercial use, solely to identify potential properties for potential purchase. All other use is strictly prohibited, is a violation of the terms of use, and may violate federal and state law.
Data Last Updated: September 23, 2026 5:04 AM UTC
© 2026 Greater Alabama MLS. IDX information is provided exclusively for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX content is not guaranteed accurate by the MLS or LoKation Real Estate - South East Florida. Data last updated: September 23, 2026 4:43 AM UTC
Listings identified with the FMLS IDX logo come from FMLS and are held by brokerage firms other than the owner of this website. The listing brokerage is identified in any listing details. Information is deemed reliable but is not guaranteed. If you believe any FMLS listing contains material that infringes your copyrighted work please 
Information is deemed to be reliable, but is not guaranteed. © 2026 MLS and FBS. Prepared by Florida Keys MLS, Inc. on September 23, 2026 4:53 AM UTC The information on this sheet has been made available by the MLS and may not be the listing of the provider. The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information
All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data relating
