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 (a = 0.96), moderate test-retest reliability (r = 0.62), 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.