PDBR vs Principal Designer (CDM): Understanding the Difference

Since the introduction of the Building Regulations 2023, there is often confusion between the Principal Designer under CDM 2015 and the Principal Designer (Building Regulations) (PD-BR). While both roles sit within the design phase, their responsibilities are distinct.

The CDM Principal Designer focuses on managing health and safety risks during construction, ensuring risks to workers are eliminated or reduced. In contrast, the PD-BR is responsible for ensuring that the design complies with the Building Regulations, with a particular focus on building safety and regulatory compliance.

Why this matters

• Appointing one does not fulfil the duties of the other.

• Failure to distinguish roles can lead to compliance gaps.

• Both roles must coordinate to ensure a safe and compliant outcome.

Airey Miller’s approach

We provide clear coordination between CDM and PD-BR roles, ensuring:

• Alignment between construction safety and regulatory compliance.

• Clear communication across all dutyholders.

• A fully integrated approach to risk management.

Conclusion

Understanding the distinction is critical to meeting legal obligations and protecting both residents and project teams.

Summary

Airey Miller ensures clear alignment between PD (CDM) and PD-BR roles, supporting safe and compliant delivery.

Contact Joel Borer, Director of Principal Designer & Health and Safety Services – joel.borer@aireymiller.com