Previous research on early intensive intervention in autistic spectrum disorder (ASD) has largely focused on outcomes of treatment for children. Although some account has been taken of parental viewpoints, the potential impact of intervention on families has not achieved the same kind of research prominence. This contrasts with the considerable literature that exists exploring the experiences of parents of children with a wide range of special needs and disabilities. This article reports data from a Local Education Authority (LEA)-funded research commission designed to inform future policy and service provision. Themes are extracted from interview transcripts and questionnaire responses to reflect the views of 15 families, including nine whose children were receiving an LEA pilot intervention programme for ASD, and six who were managing their own interventions based on Applied Behavioural Analysis (ABA). Implications are drawn for future service delivery in support of key principles for early intervention for all families of young children with developmental disabilities. (Contains 1 table.)