In 2003, Barcelona B won the amateur Spanish 4th-tier level Liga EBA, and thus got promoted to the LEB 2 division, but afterwards, they renounced their spot.

In August 2015, the club gained a vacant berth back to the second division LEB Oro.

Despite achieving the 2nd place in the 2020-21 LEB Plata season and thus promotion to LEB Oro, Barcelona reached a deal with Força Lleida CE and CB Cornellà, switching licenses with these two clubs to be demoted to the 4th tier of Spanish basketball, Liga EBA.

[1] The club cited sporting and financial reasons to demote the team and has since focused on developing young players, consistently ranking in the top places of the Tercera FEB category.

[2][3] Several young Barcelona B players have been called up to play for the first team since, such as Dame Sarr and Kasparas Jakucionis.