Building design must take into account security concerns as thoroughly as it does energy efficiency and structural integrity. Security is incorporated into BREEAM’s bigger sustainability framework (Building Research Establishment Environmental Assessment Methodology), which acknowledges that a secure structure is inherently robust. The need for a planned, risk-based appraisal, called a BREEAM Security Needs Assessment, is at the core of BREEAM’s security requirements. Project teams are compelled by this procedure to assess site-specific threats, engage with stakeholders, and implement appropriate preventive measures, going beyond generic security checklists. BREEAM ensures that security is an evidence-based, integrated component of the building’s lifecycle rather than an afterthought by including this demanding evaluation in both the design and operational phases. How BREEAM security measures facilitate improved risk assessment plans is explained in this handbook.