Richard Forsyth, 32, was convicted last month of six charges of sexually assaulting women.
Forsyth, of Brookfield Close in Weston Rhyn, denied all charges as well as 12 others, which included rape and attempted rape.
The jury in the previous trial could not come to a consensus on the remaining charges, and the Crown Prosecution Service spent some time deciding whether to pursue a new trial – this week it was confirmed that the process would begin.
No date has yet been set for the new trial.
All 18 of the alleged offences ranged from February to June last year.
The prosecution was represented throughout the trial by Mr Benjamin Lawrence and Forsyth was represented by Mr Paul Smith.