What Is the Purpose of a Construction Phase Plan (CPP)? | DNA Compliance
A Construction Phase Plan (CPP) is one of the most important documents in any UK construction project. Under CDM 2015, every project must have a CPP in place before work begins, regardless of size or complexity. Its purpose is simple: to ensure the work can be carried out safely, efficiently, and in full compliance with the law.
Why the CPP Matters
The CPP sets out how health and safety will be managed throughout the construction phase. It acts as a practical, working document that guides everyone on site. It defines health and safety arrangements and site rules, identifies significant risks and how they will be controlled, communicates emergency procedures and welfare arrangements, and ensures foreseeable risks are identified, controlled, and communicated.
A Continuously Updating Document
A CPP is not a one‑off template. It must be reviewed and updated as the project progresses, especially when new risks emerge or working methods change. It is a live management tool, referenced daily and revised whenever needed.
Who Is Responsible for Preparing the CPP?
Responsibility for preparing the CCP depends on the project structure:
Single-contractor projects — The contractor prepares the CCP.
Multiple-contractor projects — The Principal Contractor prepares, maintains and updates the CCP.
Domestic projects — The builder often assumes both contractor and client duties, including producing the CCP.
What the CPP Must Include
The CCP needs to include project details, scope, and key contacts. It also should outline all roles and responsibilities, and site rules and access arrangements. Risk assessments and control measures are vital, and welfare facilities and environmental considerations should be covered.
Why Duty Holders Rely on the CPP
For Clients
Demonstrates safe planning before work begins and shows CDM duties are being met.
For Principal Contractors & Contractors
Provides a framework for managing site safety and clarifies responsibilities and reporting lines.
For Workers
Communicates site rules, risks and emergency arrangements.
For HSE Inspectors
Demonstrates proper planning and compliance with CDM 2015.
To Summarise
The purpose of a Construction Phase Plan is to ensure construction work is carried out safely, legally, and with clear coordination. It brings together risk management, communication, site rules, and emergency arrangements. A well‑prepared CPP continuously evolves and protects workers, supports contractors, reassures clients, and demonstrates professionalism across the entire project.
