What is a Construction Phase Plan (CPP)?

Lee Marsden
October 3, 2025
Lee Marsden
October 3, 2025

A Construction Phase Plan (CPP) is a legal requirement on all construction projects under the CDM 2015 regulations. It outlines how health and safety will be managed throughout the construction phase of a project.

At Majestic Site Management, we support clients and contractors by producing and implementing compliant CPPs for public and commercial projects.

  • A Construction Phase Plan (CPP) is a legally required document under CDM 2015 that sets out how health and safety will be managed throughout a construction project, and must be in place before work starts.
  • It includes key details like risk assessments, site rules, emergency procedures, and safety arrangements, helping prevent accidents, ensure compliance, and coordinate all on-site activities effectively.

Who Is Responsible for the Construction Phase Plan?

The responsibility for preparing the CPP lies with the Principal Contractor on projects involving more than one contractor. On smaller projects with only one contractor, that individual or company must create the plan.

This is a key part of complying with CDM 2015 regulation requirements.

What Should a Construction Phase Plan Include?

  • The health and safety arrangements for managing the work
  • Fire safety and emergency procedures
  • Site rules and security protocols
  • Risk assessments and method statements (RAMS)
  • Welfare facilities and site layout plans

We also include relevant documentation from the pre-construction information provided by the client or Principal Designer.

When Must the CPP Be in Place?

The CPP must be drawn up before any construction work begins. It must also be updated regularly as the project progresses or if any significant changes occur on site.

Why Is the CPP Important?

The Construction Phase Plan ensures that all foreseeable risks are accounted for and controlled. It helps:

  • Prevent accidents and injuries
  • Ensure legal compliance with HSE and CDM regulations
  • Promote clear communication between contractors

Projects without a valid CPP risk enforcement action, including site shutdowns.

Need Help Creating a CPP?

Our experienced team prepares, reviews, and updates Construction Phase Plans for public sector and private clients. We ensure your documentation aligns with CDM 2015 and HSE best practice.

Let us help you stay compliant and safe from day one.