$11,500,000

57478 Overseas Hwy, Marathon FL 33050

103,025 Square Feet lot
4 days on market

About this property

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.

Property Details

Exterior

  • Lot Features: Beach Area | 2.5-5 Acres
  • Waterfront: Yes

Location

  • City: Marathon
  • County: Monroe County
  • State: FL
  • Road Frontage (Length/Type): 360 Main Thoroughfare
  • Zoning: SC

Construction

  • New Construction: No
  • Utilities: Other Utilities Available | None
  • Sewer: Other
  • Water Source: Municipal Water

Features

  • Has water view: Yes
  • Waterfront features: Ocean Access, Ocean Front

Public Info

  • Lot Size: 103,025 Square Feet
  • APN: 00374650-000000

Tax Information

  • Annual Tax Amount: $4,222
  • Tax Year: 2025

Price History

1/16/2026 Listed for Sale
Source: Miami REALTORS®
$11,500,000

Walk Score

Walk Score
5
Walk Score®
Car-Dependent
Transit Score
0
Transit Score®
Full Walk Score
Bike Score
52
Bike Score®
Bikeable
Kevin McCarthy
Kevin McCarthy
RACVantage Managing Broker | Commercial Real Estate Advisor






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      By proceeding, you consent to receive calls and texts at the number you provided, including marketing by autodialer and prerecorded and artificial voice, and email, from miamiforward.com and about your inquiry and other home-related matters, but not as a condition of any purchase.