The youngster spent the second-half of last season on-loan at Fulham and is keen to remain at Craven Cottage.
However, his loan extension is dependent on manager Roy Hodgson staying with the Cottagers.
Should Hodgson leave for Liverpool, Okaka is expected back at Roma for preseason - even though he wants to remain in England.
West Brom boss Roberto Di Matteo is keeping tabs on developments, according to Rome sources.