The original CB Illescas, founded in 1989, has got the record of six consecutive promotions from the lowest regional division in 2002–03 to LEB Oro,[1] division where the team played in the 2008–09 season.

The club was also famous because in 2006–07 was signed Neil Fingleton, the tallest British-born man with 232 cm.

[2] The British center only played six games with CB Illescas.

In July 2011, Baloncesto Fuenlabrada announced their farm team compete in Liga EBA but out of Illescas.

[4] After that, the town of Illescas decided to create a new team called CB Ilarcuris started to compete in the sixth division (Primera Autonómica), promoting in its first year to the Primera División.