Secured by Design (SBD) is an award scheme that aims to encourage housing developers to design out crime at the planning or concept stage. The scheme is managed by the Association of Chief Police Officers Crime Reduction Initiatives (ACPO CPI) while the day-to-day delivery of the scheme is conducted by Architectural Liaison Officers (ALOs) or Crime Prevention Design Advisors (CPDAs) working for individual police forces throughout the United Kingdom. The scheme sets standards for compliance that developments must meet to be awarded SBD status. This article presents the findings of research conducted over a 10-year period (1999-2009) into the effectiveness of the SBD scheme as a crime reduction measure. Utilising a variety of methods, the research aims to establish whether residents living within SBD developments experience less crime and fear of crime than their non-SBD counterparts; whether SBD developments show less visual signs of crime and disorder than their non-SBD counterparts; and finally, whether properties built to the SBD standard are able to sustain any crime reduction benefits over a 10-year period.