Agios Kosmas: a marina rebuilt as The Ellinikon Marina

The marina at Agios Kosmas is losing berths on purpose. In its nine-month results, presented on 19 December 2025, LAMDA Development reported a gradual fall in the number of berths available at the harbour it holds on the Athens Riviera, the coast south of the city. It gave the reason plainly: renovation works have begun. The marina has held 337 berths for yachts of 10 to 60 metres. It is being taken apart and rebuilt as The Ellinikon Marina, with 306 berths, at the seaward edge of The Ellinikon, one of the largest urban redevelopments in Europe. Until the work is done, Attica, the region around Athens, has less room for boats than it had.

Fewer berths during the works

The company describes the work in plain terms. Available berths are being reduced gradually because upgrading works have begun. The aim is to modernise the marina’s infrastructure and services and to redesign its layout so that it can take larger vessels. LAMDA set this out in its half-year accounts for 2025 and repeated the consequence in December. There, the falling number of berths was the one drag on a marina business that otherwise grew.

Through the first half of 2025, both of the group’s marinas near Athens were full, at 100 per cent of capacity. They are Flisvos at Palaio Faliro and Agios Kosmas. When a full harbour withdraws berths, it removes places that boats were using. Boats that lay at Agios Kosmas have had to find a berth elsewhere, on a coast that was already full.

The state is paying for part of the rebuild. By 30 June 2025, LAMDA had received €7.4 million from the Hellenic Republic under the Recovery and Resilience Facility, the European Union’s recovery fund, towards the renovation works.

What replaces it

The finished harbour is drawn as 306 berths and will carry the name The Ellinikon Marina. The biggest change will be on land. The coastal front around the marina will have 1 kilometre of beach, two hotels and more than 100 shops, cafés and restaurants.

Directly in front of the marina rises Riviera Galleria, 23,000 square metres, by Kengo Kuma and Associates. It sits beneath a wavy canopy that the architects based on the sails of sailboats. The Greek architectural practice BETAPLAN completed the study, and Eleftheria Deko designed the lighting. In its December 2025 results, LAMDA reported the building on schedule and on budget.

Behind them rises Riviera Tower, 200 metres, due in the second quarter of 2027. LAMDA describes it as the tallest green seaside skyscraper in the Mediterranean, and it will hold 170 residences across 50 floors. Construction began in August 2022. A revised schedule agreed with the contractor in 2025 sets that completion date. A yacht berthed at Agios Kosmas in 2028 will lie beneath a tower, a galleria and a kilometre of new beach, none of which existed on its owner’s last visit.

Three marinas, one group

Agios Kosmas is one of three harbours held by the same group. LAMDA Marinas Investments holds both marinas near Athens. Its managing director, Stavros Katsikadis, has run Flisvos since it was first developed. A third marina is being built on Corfu, drawn as 410 berths for vessels of 30 to 140 metres, which LAMDA calls the third most significant marina in Greece.

Together they form a route. Flisvos has 310 berths, more than half of them designed for yachts above 30 metres. Agios Kosmas is being redesigned for larger vessels than it has taken before. Corfu opens the Ionian Sea at the other end of the country. In October 2025, at the ICOMIA World Marinas Conference in Venice, an international meeting of the marina industry, Katsikadis presented both Attica marinas: Flisvos for its sustainable upgrade, and Agios Kosmas as the latest in marina design.

For owners in Attica

For an owner who keeps a vessel in Attica, the next two years are the harder part. With berths withdrawn progressively through 2025, the work runs through the seasons when the coast is busiest, on a shore that was already full. In 2026 and 2027 there are fewer places to keep a yacht than there were in 2024. The places that remain, at Flisvos, in the Saronic harbours and at the yards further round the coast, are being asked to hold more.

What follows is a different kind of address. Agios Kosmas has been a working harbour on the southern coast of Attica beside Glyfada, managed by LAMDA since July 2021, and until the new plans it was little more than that. It will reopen as the waterfront of a city district, with a beach, a galleria and a tower where the perimeter fence used to run. The test will be whether a marina inside a property development keeps the standards of a working harbour: depth, service and quiet. The drawings show a promenade, but owners will judge the marina by its fuel dock.

Who is this for

The Ellinikon Marina will suit an owner who wants a berth on the southern edge of Athens with a new city district at the end of the pontoon. The renderings show floating piers inside a breakwater, with low buildings under wave-shaped roofs along the quay and the Saronic Gulf beyond. A new coastal promenade will lead from the shore to The Ellinikon Park, and the beach is planned for use all year round.