The popular Czech midfielder made 9 appearances for Gianfranco Zola’s side last season in a loan spell and the manager will be very pleased to have him return to the squad to provide much needed experienced cover in midfield.
“I am delighted to be back,” Kovac told the official site. “I enjoyed my time here last season and I am very happy to get the chance to come back and compete for a place at West Ham.
“It is great that it is a permanent deal and that it is all sorted out. Now I can just concentrate on doing well for the club and the fans.”