Health & Safety in Construction: Understanding CDM Roles and Duties
Effective health and safety management is essential across every construction project, no matter the size or value. Three key frameworks guide how buildings must be designed, built, maintained and eventually demolished: CDM Regulations, Building Regulations, and the Building Safety Act. Here’s a straightforward guide to what each requires and how the related roles and duties differ.
CDM Regulations: Safe Design and Construction from Day One
The Construction (Design and Management) Regulations apply to all construction projects—commercial or domestic—right from the planning stage. Set out by the Health & Safety Executive, CDM places legal duties on:
- Clients
- Designers
- Contractors
The aim is simple: ensure that construction work is safe to carry out and that the finished building is safe to use, maintain, and eventually demolish.
More information: https://www.hse.gov.uk/construction/cdm/2015/index.htm
Building Regulations: Minimum Standards for Every Building
Building Regulations set the minimum standards for the design, construction and alteration of buildings. They ensure that all works—from new builds and extensions to renovations and conversions — are:
- Safe
- Energy efficient
- Healthy and structurally sound
They cover areas such as structural integrity, fire safety, drainage, ventilation, electrical and gas safety, and water systems. Each topic is supported by detailed Approved Documents that guide compliance.
Building Safety Act: Raising Competence and Accountability
The Building Safety Act 2022 introduced major changes to improve industry competence and raise quality standards as the UK moves toward net‑zero emissions. The Act adds new duties around:
- Managing and monitoring safety
- Coordinating and cooperating across project teams
- Clear communication throughout the design and build process
It also introduces new terminology, roles and timelines that apply to any building work.
Duty Holder Roles
Although titles may sound familiar, the duty holder roles under the Building Safety Act are separate from those under CDM. They include:
- Client (including domestic clients)
- Principal Designer
- Principal Contractor
- Designers (including lead or sole designers)
- Contractors (including sole contractors)
All duty holders must be competent—that means having the right skills, knowledge, experience and behaviours—and must only work within the limits of their competence.
Clients also have a responsibility to ensure that those they appoint are competent. Duty holders must cooperate with one another, coordinate their work and share information effectively. They must also plan, manage and monitor design and construction work to ensure compliance with Building Regulations.
Principal Designer Roles: Not All the Same
It’s important to note:
- A Building Regulations Principal Designer
- A CDM Principal Designer
- And a Lead Designer
…are different roles with different legal responsibilities, even though they share similar titles. There is no overlap or duplication—each requires a separate appointment and separate fee.
