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Gulf Of Mexico Boulevard, Marathon, FL 33050

$9,999,999
Property Type: Vacant Land Lot Size (sq. ft.): 574,992 Status: Active
Current Price: $9,999,999 List Date: 1/20/2025 Last Modified: 1/16/2026

Overview

Description

Discover unparalleled privacy and luxury on SeaWatch Island, a breathtaking 13.2-acre private island in the heart of the Florida Keys. This one-of-a-kind property offers a rare opportunity with building entitlement in hand to build a custom 9,500 sq. ft. estate. In addition to the main residence, the property allows for the construction of a stand-alone garage and pool house, offering ample space for vehicles, recreational amenities, and more. Boating enthusiasts, take note! The island is a true boater's paradise, featuring a protected marina with a concrete bulkhead and multiple deep-water slip configurations. Designed for big boat dockage, the marina accommodates Vikings, sportfishers, catamarans, and other large vessels. Whether you're a passionate yachtsman or a fishing aficionado, this property provides a safe, convenient harbor for your fleet. Inquire for more details on this unparalleled dockage opportunity. Fully equipped with a Development Agreement and Building Right, S ...

Listing Details MLS# 613238

Location, Tax & Legal

Street Name
Gulf Of Mexico
Street Suffix
Boulevard
Key/Island
Marathon
State/Province
FL
Zip Code
33050
County
Monroe
Subdivision
Seawatch (53.5)
Area
16 - Sombrero Bch Rd to Vaca Cut - Oceanside
City
MARATHON
Off Shore Island
No
Mile Marker
53.5
Marathon Neighborhood
Marathon East - Gulf (Airport to Vaca)
Side
Bay/Gulf
Flood Zone
VE-12
Alternate Key #
8628391
Parcel #
00104135-000000
Zoning
C-NA - Conservation Native Area
Deed Restrictions
Unknown
Legal
32 65 33 GOVT LT 1 AND 05 66 33 PT GOVT LT 4 (F/K/A PHASE V (THE ISLAND) SEAWATCH AT MARATHON A CONDO)
Taxes
2427.69
Tax Year
2024

Contract Information

Listing Board
Marathon/Lower Keys
ROGO Exempt
Yes
Limited Representation
No
As is Rght to Inspct
Yes
Potential Short Sale
No
Bank Owned
No
Species List
Yes

General Property Description

Realtor.COM Type
Vacant Land
Waterfront
Yes
Control Depth
4
Lot Dimensions
13.2 acre
Lot SqFt
574992
Lot Sqft Source
Property Data Card
Survey Available
Yes

Miscellaneous Info

Mobile Home Lot
No

Financial Status

Bank Owned
No
Potential Short Sale
No

More Information

Remarks & Misc

Remarks – Consumer
Discover unparalleled privacy and luxury on SeaWatch Island, a breathtaking 13.2-acre private island in the heart of the Florida Keys. This one-of-a-kind property offers a rare opportunity with building entitlement in hand to build a custom 9,500 sq. ft. estate. In addition to the main residence, the property allows for the construction of a stand-alone garage and pool house, offering ample space for vehicles, recreational amenities, and more. Boating enthusiasts, take note! The island is a true boater's paradise, featuring a protected marina with a concrete bulkhead and multiple deep-water slip configurations. Designed for big boat dockage, the marina accommodates Vikings, sportfishers, catamarans, and other large vessels. Whether you're a passionate yachtsman or a fishing aficionado, this property provides a safe, convenient harbor for your fleet. Inquire for more details on this unparalleled dockage opportunity. Fully equipped with a Development Agreement and Building Right, SeaWatch Island simplifies the process of creating your dream sanctuary. The island's concrete bridge ensures easy access while maintaining the ultimate seclusion. The property offers expansive open water views and immediate access to the Atlantic Ocean and Gulf of Mexico, placing world-class fishing, boating, and diving at your fingertips. For additional convenience, MARATHON International Airport is just a short distance away, ensuring seamless connectivity to the rest of the world. This private oasis is more than a property—it's an exceptional lifestyle. Don't miss the chance to build your legacy on SeaWatch Island, where luxury and tranquility come together like nowhere else.
Directions
Turn gulf side just west of Vaca Cut bridge. Take right turn onto Gulf of Mexico Drive. Gated entry. Access the Island by the concrete bridge

Assoc/Misc Info

Mandatory Home Owners Asc
No
1st Right of Refusal
No

Dockage

Basin
Yes
Boat Slip
Yes

Tax Exemptions

None
Yes

Waterfront

Canal Front
Yes
Gulf Front
Yes
Open Water
Yes

Waterview

Bay View
Yes
Canal View
Yes
Harbor/Marina View
Yes
Open Water View
Yes

Neighborhood Feature

Airstrip
Yes
Beach
Yes

Location/Site

Mangrove
Yes
Water Frontage
Yes
Wooded Lot
Yes

Existing Utilities

None
Yes

BuildingPermit

No Permit
Yes

Security

Electric Gate
Yes

Land Size

10 or more Acres
Yes

Title

Negotiable
Yes

Property Rights

Tranfrble Bldg Prmt
Yes
Transfer Bldg Rights
Yes

Property Features

Tax Exemptions: None Waterfront: Canal Front; Gulf Front; Open Water Dockage: Basin; Boat Slip Waterview: Bay View; Canal View; Harbor/Marina View; Open Water View Neighborhood Feature: Airstrip; Beach Existing Utilities: None BuildingPermit: No Permit Security: Electric Gate Land Size: 10 or more Acres Title: Negotiable Property Rights: Tranfrble Bldg Prmt; Transfer Bldg Rights
Listing Office: Coldwell Banker Schmitt Real Estate Co.
Last Updated: January - 16 - 2026
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 being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.
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