Brown made his senior Chelsea debut as a substitute against his former club West Brom in the penultimate Premier League game of the 2014/15 campaign, before heading out on loan, initially with Vitesse Arnhem in the Netherlands.
After a successful spell with Rotherham, Brown helped Huddersfield earn promotion to the Premier League, but a knee injury marred his top-flight loan at Brighton and continued to trouble him during subsequent stays at Leeds, Luton and Sheffield Wednesday.
He now joins Preston, who finished 13th in last season’s Championship table and have former Chelsea winger Scott Sinclair in their squad, on a permanent basis.
All at Chelsea wish Izzy well for the season ahead with Preston and his future career.