Slaven Bilic's team move into a new home this summer, but who will be going with them?
Expiring contracts: Joey O'Brien, Elliot Lee, Leo Chambers
Expiring loan deals: Alex Song, Emmanuel Emenike, Victor Moses
Pre-contracts: Toni Martinez
Loan returns: Reece Burke, Josh Cullen, Diego Poyet, Kyle Knoyle
Goalkeepers: Adrian, Darren Randolph, Raphael Spiegel
Defenders: Sam Byram, James Tomkins, James Collins, Winston Reid, Angelo Ogbonna, Reece Burke, Reece Oxford, Doneil Henry, Kyle Knoyle, George Dobson, Aaron Cresswell, Stephen Hendrie
Midfielders: Cheikhou Kouyate, Mark Noble, Pedro Obiang, Manuel Lanzini, Dimitri Payet, Michail Antonio, Martin Samuelsen, Josh Cullen, Diego Poyet,
Forwards: Andy Carroll, Diafra Sakho, Enner Valencia, Toni Martinez, Djair Parfitt-Williams
Areas in need of attention?
Borussia Monchengladbach midfielder Havard Nordtveit is expected to arrive on a free transfer, replacing Song, whose loan reportedly will not be renewed. A new centre forward is likely to top Bilic's wishlist - despite the recent revival of Andy Carroll. The Hammers are a little short of senior right-backs, though as in other areas they do have several capable youngsters ready to step up.