A high proportion of children with ADHD, around 70-80%, continue to have this condition into adulthood and the rate of comorbidity is high. The NICE (2008) guideline on attention deficit hyperactivity disorder (ADHD) recommends the development of services and/or clinics specialised in the treatment of adults with ADHD. This is a challenging endeavour in times of austerity measures. We illustrate how existing and recently started adult ADHD clinics/services can be used as models for new service development projects in the United Kingdom.