And while the Catalan club are delighted that a protracted transfer has gone through, so too are Rennes, Dembele's first club, who have now netted around €40m in total transfer fees for the player.
The fee actually sets a club record for the most money ever received for a player, smashing Shabani Nonda's €20m transfer to Monaco in 2000.
However, a statement on the Rennes website insisted that their pride at the deal went beyond financial gain as they hope their youth system will be given greater credit.
"When joining Barcelona, Ousmane Dembele also puts focus on the quality of Rennes' training," it read.
Visca Barça, Visca Catalunya !— Ousmane Dembélé (@Dembouz) August 25, 2017
"Ousmane Dembele took advantage of the ability of the club to make every effort to bring him to his highest level.
"We are particularly proud of the sporting rise of Ousmane Dembele, to whom we sincerely wish the best possible success throughout the course of his career."
Dembele scored 12 Ligue 1 goals in 26 games in his sole senior season with Rennes.