The Potters had the third oldest squad in the Premier League last season and the likes of Michael Owen, Matthew Upson, Rory Delap, Mamady Sidibe, Carlo Nash and Dean Whitehead have all been allowed to leave this summer.
Tony Pulis' exit means that Stoke will have undergone major changes by the time the new season comes around, but Coates says that Hughes will not be forced into buying younger players in the transfer market.
"When you're dealing in the transfer market, you like the players to be the right age so they have a residual value," he told the Daily Star.
"But that doesn't mean we are going to sign exclusively younger players.
"There's a certain age beyond which we're not comfortable buying because there will be no value afterwards - but a team also needs experience.
"Mark wants to have a good look at the squad and I don't think there will be huge changes."