(Image source: listing photo, LoKation Real Estate, November 2026)
12399 Overseas Hwy, Unit 10 is an end-unit townhome in Coral Lagoon Resort, a waterfront community in the heart of Marathon real estate in the Middle Florida Keys. It checks two boxes that rarely show up together in the Keys: nightly rentals are permitted, and your boat lives right outside the back door.
The home is listed by Brian Kruszewski of LoKation Real Estate, and I’m featuring it here with his permission.
The Townhome
This is a two-story, 3-bedroom, 2.5-bath townhome built in 2007, with about 1,360 square feet of living space. Being an end unit, it has neighbors on one side only.
The main level is open, with the living and dining areas flowing into a kitchen with granite countertops. Covered outdoor living space looks out over the water. Upstairs, the primary suite opens onto a large private balcony.
The recent work is the kind that matters most in the Keys:
- A metal roof
- A new air conditioning system and a new washer and dryer in spring 2026
- Dryer vents professionally cleaned in summer 2026
- A replacement oven and dishwasher within the past three years
Dockage and Boating
A 40-foot deeded boat slip sits directly behind the unit. No trailer, no ramp line, no storage fees. You walk out the back door and you’re on your boat.
From there it’s a short run to the Atlantic, the Gulf, the reefs and the sandbars. The listing shows a control depth of about 5 feet, so check that against your boat’s draft. The Boat House Marina next door handles fuel, ramp access and boating services, and Coral Lagoon itself has a heated pool and tropical landscaping.
Nightly Rental Potential
Plenty of Florida Keys condo and townhome communities don’t allow short-term rentals. Coral Lagoon does, and this unit already runs as a vacation rental with a documented history of rental income. Financial records are available through the listing agent on request.
For a buyer, that means the option to let the property help carry itself while you block out your own weeks in the Keys. Every year you wait is another season of sunsets from that balcony that someone else gets to enjoy.
Buying for rental income? Confirm the current association rules, City of Marathon rental licensing and insurance costs before you write an offer. I’m happy to walk you through what to ask.
On the financing side, investment purchases like this one often fit a DSCR loan, which qualifies on the property’s rental income rather than your personal income. I’m also a licensed mortgage loan originator (NMLS #2773431) with LoKation Mortgage (NMLS #2682974), and you can start at KeysLender.com.
Next Steps
Pricing and status change, so check the live MLS listing for 12399 Overseas Hwy Unit 10 for current details and the full photo gallery. For background on the community, read my Coral Lagoon Resort guide.
You can also compare other Marathon condos and townhomes, browse Marathon waterfront homes, read the Marathon real estate market report for September 2026, or see the other homes on my featured listings page.
Own a home in Coral Lagoon or elsewhere in Marathon and thinking about selling? Ask me about my certified home program, which covers a pre-listing inspection, issues addressed before you list, and a home warranty. Learn more about selling your Florida Keys home.
Questions or a showing? Contact Jim Signor - Florida Keys Real Estate or call 305-394-4449.
Frequently Asked Questions
Where is 12399 Overseas Hwy Unit 10?
12399 Overseas Hwy Unit 10 is in Coral Lagoon Resort, a waterfront townhome community in Marathon in the Middle Florida Keys, roughly halfway between Key Largo and Key West.
Does 12399 Overseas Hwy Unit 10 come with a boat slip?
Yes. The listing includes a 40-foot deeded boat slip directly behind the townhome. The Boat House Marina next to Coral Lagoon Resort offers fuel, a boat ramp and boating services.
Are nightly rentals allowed at 12399 Overseas Hwy Unit 10?
Yes. Nightly rentals are permitted at Coral Lagoon Resort, and this unit has an operating vacation rental business with a documented rental history. Buyers should confirm current association rules and City of Marathon rental licensing before purchase.
How do I see the current price of 12399 Overseas Hwy Unit 10?
Current pricing and status are on the live MLS listing page for 12399 Overseas Hwy Unit 10 on KeysListings.com, which updates directly from the Florida Keys MLS.