As reported last month, the Norman Foster-designed Riviera Tower will form the centrepiece of Lamda鈥檚 proposed Elinikon development near the former Hellenikon Airport near Athens.
The tower will be Greece鈥檚 first skyscraper, claims Lamda Developments.
The Bouygues/Intrakat JV has already provided consulting services for the project through early contractor involvement ECI and a two-stage tender process.
The JV has also carried out preliminary works involving the design, planning, logistics and construction management of the project under a separate early works contract.
Lamda Developments鈥 chief executive Odysseas Athanasiou commented: "We are particularly pleased to sign today's agreement with Bouygues Batiment International and Intrakat consortium, which is undertaking a particularly challenging project; the construction of the first, highest building in Greece, the Riviera Tower.鈥
Athanasiou said he hoped that the project would become 鈥渢he new landmark for our country".

Bouygues chairman and CEO Eric Saint-Andr茅 said that the Riviera Tower will be his company鈥檚 second project with Foster & Partners following the Kai Tak cruise terminal in Hong Kong 10 years ago.
聽鈥淭he Riviera Tower is a great opportunity for us to express our historical expertise in the construction of complex high-rise buildings, with ambitious low-carbon requirements,鈥 said Saint-础苍诲谤茅.
His opposite number at Intrakat, chairman and CEO Alexandros Exarchou, added: 鈥淏y participating in this flagship project, we are taking part in an important initiative, focused on sustainable development, which will boost the country's economy, create new job positions, boost tourism and attract capital and investment worth billions.
鈥淭he implementation of the Riviera Tower will serve as a symbol of the Greek construction sector's ability to undertake and successfully complete complex, large-scale projects."
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