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57478 Overseas Highway 0, Marathon, FL 33050

$10,500,000
Property Type: Commercial Sale Lot Size (sq. ft.): 103,025 Status: Active
Current Price: $10,500,000 List Date: 1/12/2026 Last Modified: 3/20/2026

Overview

Description

Rare oceanfront development opportunity in the heart of the Florida Keys. Encompassing nearly 6 acres of pristine oceanfront land in Grassy Key, this exceptional parcel presents an ideal canvas for developers seeking to create luxury residential units with direct oceanfront and beach access. Surrounded by unspoiled natural beauty and tranquil beaches, the property offers immediate proximity to shopping, fine dining, spas, marinas, and world-class boating. Residents will enjoy unparalleled access to deep-sea fishing, scuba diving, snorkeling, and vibrant coral reefs, all set against the backdrop of the Keys' iconic turquoise waters. Located in Marathon, often referred to as the Heart of the Florida Keys, the site benefits from a highly desirable central Keys location, conveniently positioned between the Upper Keys—such as Islamorada—and the Lower Keys, including Key West. Marathon is known for its rich maritime history, local airport, and accessibility, serving as a cen ...

Listing Details MLS# 618083

Location, Tax & Legal

Street #
57478
Street Name
Overseas
Street Suffix
Highway
Key/Island
Marathon
State/Province
FL
Zip Code
33050
Subdivision
Grassy Key (58.9)
County
Monroe
Area
19 - Crawl Key & Grassy Key
Unit #
No
City
MARATHON
Off Shore Island
No
Mile Marker
58.9
Marathon Neighborhood
Grassy Key
Side
Ocean
Alternate Key #
1457736
Add'l Parcel #1
00374660-000000
Parcel #
00374650-000000
Add'l Parcel #2
00374670-000000
Zoning
MU - Mixed Use Commercial Mixed Use
Legal
BK 58 LT 10 CRAINS SUBD PB1-51 OF GRASSY KEY OR135-95-96 OR140-29-30 OR407-765-768 OR474-436-438 OR683-887 OR685-713 OR
Taxes
11195.1
Tax Year
2022

Contract Information

Listing Board
Florida Keys
Limited Representation
No
As is Rght to Inspct
Yes
Potential Short Sale
No
Bank Owned
No

General Property Description

Realtor.COM Type
Commercial
Style
Commercial
Lot SqFt
103025
Waterfront
Yes
SqFt Source
Property Data Card
Control Depth
0

Association Info

Mandatory Home Owners Asc
No
1st Right of Refusal
No

Financial Status

Bank Owned
No
Potential Short Sale
No

More Information

Remarks & Misc

Remarks – Consumer
Rare oceanfront development opportunity in the heart of the Florida Keys. Encompassing nearly 6 acres of pristine oceanfront land in Grassy Key, this exceptional parcel presents an ideal canvas for developers seeking to create luxury residential units with direct oceanfront and beach access. Surrounded by unspoiled natural beauty and tranquil beaches, the property offers immediate proximity to shopping, fine dining, spas, marinas, and world-class boating. Residents will enjoy unparalleled access to deep-sea fishing, scuba diving, snorkeling, and vibrant coral reefs, all set against the backdrop of the Keys' iconic turquoise waters. Located in Marathon, often referred to as the Heart of the Florida Keys, the site benefits from a highly desirable central Keys location, conveniently positioned between the Upper Keys—such as Islamorada—and the Lower Keys, including Key West. Marathon is known for its rich maritime history, local airport, and accessibility, serving as a central hub comprising islands such as Vaca Key, Duck Key, and Grassy Key. A truly rare offering combining scale, location, and oceanfront presence—an exceptional opportunity to develop a legacy project in one of Florida's most coveted coastal destinations. Please read the broker's remarks for detailed information on this offering.
Directions
HAVE ACCESS TO AVAILABLLE BUILDING RIGHTS. CALL FOR MORE INFORMATION.

Type

Other Comrcl Style
Yes

Fee Includes

None
Yes

Dockage

None
Yes

Appliances

No Appliances
Yes

Waterfront

Oceanfront
Yes

Waterview

Ocean View
Yes

Construction

Other
Yes

Land Size

5 Less Than 10 Acres
Yes

Utilities

Sewer Available
Yes

Property Features

Type: Other Comrcl Style Waterfront: Oceanfront Waterview: Ocean View Dockage: None Utilities: Sewer Available Appliances: No Appliances Construction: Other Land Size: 5 Less Than 10 Acres Fee Includes: None

Documents

Listing Office: Compass Florida - Miami Beach
Last Updated: March - 20 - 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.