Family accommodation in obsessive-compulsive disorder (OCD) refers to a condition in which a family member assists or facilitates the patient with OCD in performing the compulsion, or provides assurance to minimize or reduce the anxiety level. This condition can be significantly disabling to the individual as well as to the family dynamic. In this case report, a mother of a 14-year-old female patient carried out almost all the compulsive behaviours and rituals for her child. Family-based cognitive behavioural therapy was offered to this case over a 4-month period with a successful treatment outcome. This result provides initial evidence that this type of intervention is suitable for patients from Saudi Arabia, a non-Western culture.