Everton have sold Dowell to Norwich for an undisclosed fee as they begin their summer clear-out ahead of next season.
The midfielder came through the Toffees academy, joining the club at the age of seven, but made just five first-team appearances as he was sent out on several different loans moves.
He told canaries.co.uk: "There was a bit of interest [from other clubs] towards the end of the season and when Norwich came up, with the history of the club and what they've got going on with the boss and the players they've got here, I think it was a really good fit for me.
"It's a massive step in my career which is why I had to make sure it's the right decision for me."
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