This Practice Note lists the circumstances in which local authorities can consider a complaint about a high hedge under the Anti-Social Behaviour Act 2003 (ABA 2003), providing definitions of high hedge, domestic property and reasonable enjoyment. It explains that problems associated with high hedges can be prevented by attaching planning conditions to permissions for new developments, with reference to guidance in Circular 11/95, and mentions that formal complaints under ABA 2003 should be a last resort. It then provides an overview of the procedure for dealing with complaints under ABA 2003.