West Ham wanted to extend Mavropanos' contract in the summer to convince him to stay with the club in the Championship, but an agreement was not reached. Despite no new deal being agreed, the Irons retained the defender. Mavropanos' contract currently runs until June 2028.

West Ham has offered Konstantinos Mavropanos a new deal that is similar in form to the one offered to Jarrod Bowen. The club is awaiting a response.

Dinos Mavropanos, a 28-year-old Greek centre-back, has the option to sign a deal at West Ham that would ensure he stays to help the club recover its Premier League status this season. The new offer has three conditions: his contract would be extended by two years; a release clause would be added to his deal that would allow him to leave if the club is not promoted back this season; and Mavropanos would receive a large promotion bonus if West Ham returns to the Premier League at the end of the 2026/7 season. The defender, who joined the club in August 2023 and has 42 caps for Greece, has a current contract that runs until 2028 and a Transfermarkt market value of €18.00m. Several clubs, including Arsenal and Borussia Dortmund, have recently been linked with him. In July 2026, reports suggested West Ham could ask for a fee of £30-35 million for the player.