Constellation Group, The Boschetti Group, and Vietmar
SeaGlass Cove Condos
59720 Overseas Highway, Grassy Key (Marathon), Florida 33050
SeaGlass Cove Condos is a new pre-construction detached home community by Constellation Group, The Boschetti Group, and Vietmar in Marathon, Florida.
SeaGlass Cove brings a set of substantial single-family homes to Grassy Key in Marathon, a quieter stretch of the Florida Keys along the Overseas Highway. The residences run four to five bedrooms across more than 4,800 square feet on three stories, each with a two-car garage.
The project is a joint effort by Constellation Group, The Boschetti Group, and Vietmar. It is currently under construction, with the earliest residences completed in 2024.
Key project details
- Location
- 59720 Overseas Highway, Grassy Key (Marathon), Florida 33050, Marathon, Florida
- Developer
- Constellation Group, The Boschetti Group, and Vietmar
- Home types
- 4–5 bedroom homes, 4,800+ sq ft over three stories with a 2-car garage
- Pricing
- From $3M
- Occupancy
- Under construction; first residences completed in 2024
Gallery
How this listing is verified
- ✓ Listing facts compiled from multiple public sources and cross-checked by LIQWD's audit system
- ✓ Pricing and availability update as builders release them — last updated October 1, 2026
- ✓ Corrections from verified agents and builders are reviewed by our team — pre-construction details change; confirm final terms with the sales team
Local amenities
Marathon sits at the midpoint of the Florida Keys, and life on Grassy Key leans heavily on the water and the outdoors. Everyday needs, dining, and marine services are found along the Overseas Highway corridor that runs through the city, while the surrounding Keys offer fishing, boating, diving, and beach access that define the region's lifestyle. For specifics on the closest shops, schools, and services, buyers should confirm current options directly, as the immediate area is largely residential and resort in character.
Getting around
The Overseas Highway (US-1) is the single road that threads the Florida Keys together, and SeaGlass Cove sits directly on it at Grassy Key. That highway connects Marathon north toward Islamorada and Key Largo and south to Key West, and is the primary route for residents traveling anywhere in the island chain. Marathon also has a general-aviation airport nearby for regional flights.
About Constellation Group, The Boschetti Group, and Vietmar
SeaGlass Cove is being developed by Constellation Group, The Boschetti Group, and Vietmar, working together on this Florida Keys community. The partners bring their combined experience to residential development in South Florida. Prospective buyers are encouraged to review the team's portfolio and confirm project details directly with the developers.
Buying pre-construction at SeaGlass Cove Condos
Buying a new single-family home like those at SeaGlass Cove often begins with registering early for access to floor plans, pricing, and the first release of homes. Getting on the list ahead of a public launch can matter when a limited number of residences are available.
Purchase agreements for new construction typically involve a deposit paid in stages, followed by a closing once the home is complete and ready for occupancy. Because SeaGlass Cove is a collection of single-family houses rather than condominium units, Florida's statutory condominium rescission period does not apply here; the specific terms are set out in the purchase contract.
Review any agreement carefully and consider independent legal and financial advice before signing. Deposit structures and other specifics will be confirmed by the developers.
Frequently asked questions
What is SeaGlass Cove Condos?
SeaGlass Cove is a single-family home development on Grassy Key in Marathon, Florida, in the Florida Keys. It is being built by Constellation Group, The Boschetti Group, and Vietmar.
What types of homes are available?
The community offers four- and five-bedroom homes of more than 4,800 square feet, laid out over three stories and including a two-car garage.
How much do homes at SeaGlass Cove cost?
Pricing starts from $3,000,000 CAD. Final pricing and availability should be confirmed directly with the developers, as figures can change during a sales program.
When will SeaGlass Cove be ready?
The project is under construction, and the first residences were completed in 2024. Timing for remaining homes will be confirmed by the builder.
Where is SeaGlass Cove located?
The community is at 59720 Overseas Highway on Grassy Key in Marathon, Florida (33050), directly along US-1 in the middle Florida Keys.
Who is the builder?
SeaGlass Cove is a joint development by Constellation Group, The Boschetti Group, and Vietmar.
How do I register for more information?
You can register your interest to receive updates on availability, floor plans, and pricing. A representative will follow up with the current details as the sales program progresses.
Information last updated October 1, 2026. Details are provided by the builder and may change without notice.
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