Children in residential care tend to be less content with the quality of care arrangements and participation opportunities compared to children in foster care. This study explored possible differences in social workers' views about child participation and service quality. Hierarchical regression analyses were used to test if any differences may be explained by collaboration between professionals' and social workers' work engagement. We found that social workers from residential care services seem more prudent in letting children participate in case planning compared to social workers planning for foster care. Social workers' judgements of service quality were also highly affected by their organizational affiliation, but personal factors such as work engagement may also play a part. The differences we found regarding social workers' attitudes towards participation and their rating of service quality are associated with organizational culture. Understanding how organizations shape social workers' decisions to include or exclude children in care planning may help gain a more comprehensive understanding of what is needed to take the participation agenda forward.