A comparative look between the NHS guide on Depression and Suicide, the City of London’s mental health aims, and their guidelines for preventing suicide in high-rise buildings within London. Suicide prevention is more than just reacting to the endpoint of severe depression. The lack of availability of mental health services that could prevent suicidal ideation starkly informs the need for ‘suicide preventive engineering’, which appears to be the cheaper, more convenient approach to mental health for the city of London.