After years of development at the club's Hale End academy, the 16-year-old prodigy decided to turn down the offer to stay with the club, as Villa made a decisive move to secure his talents.
Both clubs are currently going through the five-step process to finalise compensation which will see Arsenal profit from the young star.
Asemota is an England U16 international and made three appearances for Arsenal at U18 level last season but elected to leave the club which has left a gap for fellow goalkeepers Khari Ranson and Jack Porter to sign scholarships.