What Is a Principal Designer Under CDM 2015 and Why Does It Matter?
The Construction (Design and Management) Regulations 2015 (CDM 2015) put health and safety at the heart of project delivery. One of the most important appointments under these regulations is the Principal Designer (CDM). Far from being a formality, this role is central to ensuring safe design, effective coordination, and smooth delivery on site.
At Airey Miller, we have seen first-hand how the Principal Designer shapes projects by embedding safety into design choices, clarifying responsibilities, and ensuring that the right information flows between client, designers, and contractors.
Why the role matters
The Principal Designer must plan, manage, and monitor the pre-construction phase, coordinating design work so that risks are eliminated or controlled. This is not just about compliance: it is about actively influencing how a project is designed and built.
For housing providers, this can mean:
Reducing risk at source by designing out hazards wherever possible.
Smoother delivery as contractors face fewer design-related issues on site.
Improved safety for residents and workers, particularly in occupied refurbishments.
Cost savings from reducing redesigns and delays due to poor coordination.
How Airey Miller adds value
Our team doesn’t just interpret the regulations: we apply them in a way that protects clients, contractors, and residents alike. With extensive experience across new-build housing and refurbishment of occupied estates, we understand the pressures our clients face.
We provide practical, proactive input that ensures:
Hazards are identified and addressed before they reach site.
Information is shared clearly between all dutyholders.
Clients are supported in meeting their legal obligations under CDM.
Conclusion
The Principal Designer is not just another appointment: it is the role that ties safety, compliance, and delivery together.
Appointing Airey Miller as your CDM Principal Designer means choosing a partner who reduces risk, improves project outcomes, and safeguards residents.
Contact Joel Borer, Director of Principal Designer & Health and Safety Services – joel.borer@aireymiller.com.
