The Participation and Sensory Environment Questionnaire: Home Scales (P–SEQ): Home Scales is a parent report tool designed to assess the impact of the sensory environment on participation in daily activities in the home of children with and without autism spectrum disorder. A cross-sectional study was completed to determine internal consistency, test–retest reliability, and examine item distribution. A total of 304 parents of children between the ages of 2 and 7 years of age completed the P–SEQ: Home Scales. Results identified excellent internal consistency (α = 0.96), moderate test–retest reliability (r = .62), and reasonable item distribution. Results suggest that the P–SEQ: Home Scales provides reliable estimates of the impact of the sensory environment on children’s participation in home activities.