Ahead of facing Bournemouth this evening, dropped points by both Swansea City and Brentford meant the celebrations started early.
The Canaries were aware a victory over the Cherries at Carrow Road would ensure an instant return to the top flight after they were relegated in July.
However, promotion rivals Swansea and Brentford both failed to win in their 12.30pm kick-offs against Wycombe and Millwall, with the two games ending in draws, meaning Norwich’s points total of 90 can only be reached by Watford, who occupy the other automatic promotion spot in second.
The Canaries will get the chance to toast their top flight return and remain on track for the title with victory over Bournemouth on Saturday evening.
Boss Daniel Farke remained in charge despite their bottom place finish in the Premier League last season and has masterminded a superb campaign, with 27 wins out of their 41 league fixtures so far.
Additional reporting by Press Association.