Build UK is set to publish Version 5 of the Common Assessment Standard (CAS) on 1 July 2025. This latest version marks a significant milestone, as the Building Safety section, introduced in 2024, will now become mandatory for all companies undertaking design or building work under the Building Safety Act.
The new version also includes key updates across several other sections:
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Corporate & Professional Standing
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Environmental
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Fairness, Inclusion & Respect (FIR)
These updates reflect the most recent legislation and industry guidance. From 1 July, companies undergoing CAS certification will be required to complete this updated question set. Notably, several Build UK Contractor members will expect certain Specialist Contractors in their supply chain to have successfully completed the Building Safety section by 1 October 2025.
The Common Assessment Standard continues to gain traction across public and private sector clients as a key tool to demonstrate organisational capability and compliance under the Building Safety Act. Certification is required only once via any of the Recognised Assessment Bodies, and businesses are encouraged to review their current accreditations to avoid duplication and reduce unnecessary bureaucracy in pre-qualification.
FIS plays an active role in shaping this standard and hosts a mirror group that reviews and feeds into the assessment criteria. If you would like to be involved in this group and contribute to the future of CAS, please contact jamesparlour@thefis.org.