
$299,000
100 Avenue I
Acreage not stated
Marathon, FL 33050
Listing courtesy of Florida Realty of Miami CorpMLS 11908620




50 photosMarathon, FL 33050
Price
$7,000,000Acreage
6 acresPrice per acre
$1,166,667Status
For saleListed
Jan 11, 2026Facts below are what the listing agent stated. LandAuthority does not verify them, and a fact that is missing is shown as unknown rather than left blank. Unknown never means no.
Water
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.
Supplied by the listing agent and shown without edit.
None of these can be settled by a listing description. Each one names who can answer it.
General information, not legal, engineering or financial advice.

$299,000
Acreage not stated
Marathon, FL 33050
Listing courtesy of Florida Realty of Miami CorpMLS 11908620

$540,000
0.04 acres$13,500,000 per acre
Key Largo, FL 33037
Listing courtesy of Florida Realty of Miami CorpMLS 11777691

$350,000
0.12 acres$2,916,667 per acre
Key Largo, FL 33037
Listing courtesy of Compass Florida, LLCMLS 11394600