This assessment tool was developed in collaboration with NHS trusts participating in The King’s Fund’s Enhancing the Healing Environment (EHE) programme. This phase of the EHE programme was funded by the Department of Health to support the implementation of the National Dementia Strategy. The assessment tool is informed by research evidence and reflects best practice. It is the first of a series of tools produced by The King’s Fund to help individuals and organisations develop more supportive design for people with dementia.