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Executive Summary

This 6+ acre oceanfront parcel in Grassy Key presents an extraordinary development opportunity in the Florida Keys. Located at Mile Marker 57, this property offers more than 100,000 SF of prime land with direct ocean and beach access. Its expansive frontage and unobstructed water views create an exceptional canvas for luxury residential development, private estate homes, or a resort-style retreat.
Positioned in the central Keys, the site benefits from effortless connectivity along U.S. 1 and proximity to both Islamorada and Key West. Residents and guests will enjoy convenient access to boutique shopping, fine dining, world-class marinas, and recreational options including deep-sea fishing, snorkeling, and boating, all within minutes. The property’s natural topography and lush vegetation provide privacy and a serene environment, while surrounding waters showcase the Keys’ renowned turquoise clarity.
As one of the few remaining oceanfront tracts of this scale, the site combines extensive size, superior location, and unparalleled frontage—an extraordinary foundation for a signature project in one of America’s premier coastal destinations.

Property Facts

Price $14,641,935 CAD
Sale Type Investment
No. Lots 1
Property Type Land
Property Subtype Commercial
Proposed Use Multifamily
Total Lot Size 6.26 AC
No. Stories 2
Zoning MU - Residential, Commercial and retail uses on the same parcel.

1 Lot Available

Lot See below

Price $14,641,935 CAD
Price Per AC $2,338,967.21 CAD
Lot Size 6.26 AC

This offering is composed of 6 plus or minus acres 57478 Overseas Highway has 3 parcels: ID#00374650-000000, ID#00374660-000000, ID#00374670-000000, & 57468 Overseas Highway has 3 parcels: ID#00374680-000000, ID#00374690-000000, ID#00374700-000000.

Description

Rare oceanfront development opportunity in the heart of the Florida Keys. Encompassing nearly 6 acres of pristine oceanfront land in Grassy Key mile marker 57, 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. Addresses 57478 and 57468 Overseas Highway

Not walkable
10/100
Exceptionally drivable
100/100
Fairly bikeable
50/100

Property Taxes

Property Taxes

Parcel Numbers
Multiple
  • 00374670-000000
  • 00374690-000000
  • 00374680-000000
  • 00374700-000000
  • 00374650-000000
  • 00374660-000000
Land Assessment
$3,716,227 CAD
Improvements Assessment
$84,246 CAD
Total Assessment
$3,800,473 CAD
  • Listing ID: 39135109

  • Date on Market: 2026-01-19

  • Last Updated:

  • Address: 57478 Overseas Hwy, Grassy Key, FL 33050

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