$7,000,000
57478 Overseas HwyMarathon, FL 33050
Land and lots · MLS 11630819 · Listed 291 days ago (Jan 12, 2026)
Ocean or gulf · Direct parcel frontage · Waterfront details
For sale: Listed and available according to the MyStateMLS feed.
About this land
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.
Description provided by the listing brokerage.
MLS-reported waterfront
Waterfront details
The listing represents the offered parcel itself as adjoining the water. This is what the listing reports, not a survey or a title finding.
- Relationship to the water
- Direct parcel frontage
- Water type
- Ocean or gulf
- Water body
- Not provided. Ask the listing agent.
- Frontage length
- Not provided. Ask the listing agent.
- Water access arrangement
- Not provided. Ask the listing agent.
- Docks, slips, lifts, moorings
- Not provided. Ask the listing agent.
- Dock depth
- Not provided. Ask the listing agent.
- Shoreline
- Beach access reported
- Seasonal or tidal conditions
- Not provided. Ask the listing agent.
- Boating limits (bridges, depth, open-water access)
- Not provided. Ask the listing agent.
Why this is listed as waterfront
WaterfrontYN“Yes”: The listing is marked waterfront.WaterfrontFeatures“Ocean Front, Beach Access”: Includes a "… Front" value describing frontage.PropertyTypeDetail“land”: Property form used to read the frontage relationship.
Classified from fields in the MyStateMLS listing data. It has not been independently verified, and it is not a survey, title examination or legal determination of shoreline or access rights. Rules version 2026-10-29.1. How we classify waterfront
Something wrong with this classification? Report a waterfront classification issue. Questions about frontage, docks or access are best answered by Compass Florida, LLC.
Facts
- List price
- $7,000,000
- Original list price
- $11,500,000
- Status
- For sale
- Property type
- Land and lots
- Lot size
- 6 acres (103,025 sq ft)
- County
- Monroe County
- MLS number
- 11630819
- Annual property tax (2025)
- $4,222
Facts are reported by the listing brokerage. Items not listed were not provided; that does not mean the property lacks them.
Land details
- Water source
- Public (WaterSource)
Features
Water
- Public (Water Source)
Virtual tours
Location
The pin is the listing's reported coordinates and may be approximate. It is not a parcel boundary or shoreline, and no flood, wetland or hazard conclusion should be drawn from it. See more listings in Marathon.
Price and status history
- Original list price reported by the brokerage: $11,500,000
Changes observed by Waterfront Homes in MyStateMLS data since Oct 29, 2026. This is not a public-record sales history; MyStateMLS does not publish sold prices.
Estimate a monthly payment
Estimated monthly payment
$37,789 per month
An estimate for comparison only, not a loan offer or approval. Actual rates, taxes, insurance, PMI and fees depend on your lender, credit, location and loan program.
Questions to ask before you buy
Questions worth investigating for any waterfront property. They are not claims that this property has a problem or meets any condition.
- Who owns the shoreline and the land under the water, and are there easements or public-access rights along it?Ownership can stop at a high-water line, a survey line or a seawall. A title search and survey answer this, not the listing.
- Is a dock, slip, lift or mooring included, and do the rights transfer to you?Docks can be shared, leased, assigned by an association or held under a permit that does not automatically transfer.
- What permits exist for the dock, seawall or other shoreline structures, and what would new work require?Shoreline work is often regulated by local, state and federal agencies.
- How much does the water level change by season, by tide or by reservoir management?Depth at a dock in one season can differ a lot in another.
- What does flood insurance cost for this property, and what does the current flood map show?Get a quote from an insurer or agent. A flood zone is not a premium, and no zone does not mean no risk.
- What maintenance does the shoreline need (seawall, bulkhead, riprap, erosion), and what has been done recently?Shoreline structures are expensive to repair; ask for records and inspection reports.
- How are water, sewer or septic, and power provided?Waterfront septic systems and wells can have extra rules and inspections.
- How do you reach the property by road year-round, and who maintains that road?Some waterfront roads are private, seasonal or shared.
- What local rules apply: rentals, docks, boat lifts, fences, tree removal, setbacks?Rules come from the town, county, state, lake authority or association and vary widely.
Printable due-diligence checklist · Ownership budget planner · FEMA Flood Map Service Center (official flood maps; look up the address yourself)
Guides and next steps
Listing courtesy of Compass Florida, LLC. Listings provided by MyStateMLS.
Listing last updated by the brokerage Aug 28, 2026, 12:51 PM UTC. Waterfront Homes last received MyStateMLS data Oct 30, 2026, 10:01 PM UTC. Information is deemed reliable but not guaranteed; verify all details with the listing agent.