Construction Phase Plan: Who Writes It and When?
Pro Site Docs · Guide
The Construction Phase Plan (CPP) is a CDM 2015 requirement that trips up a lot of contractors. Here is who is responsible and when it must exist.
What is a CPP?
A Construction Phase Plan sets out the health and safety arrangements, site rules and specific measures for the construction phase of a project. It must be in place before construction work starts.
Who writes it?
The principal contractor draws it up (or the contractor, on single-contractor projects). On domestic jobs that duty typically falls to the contractor in control of the work.
What goes in it
- Project description and key dates
- Management of the work and site rules
- Arrangements for controlling significant risks
- Welfare arrangements
Get a head start
Our CDM 2015 document templates include editable Construction Phase Plans you tailor to the project. See the Principal Contractor CDM Pack.
Lee Hunt — SMSTS · NEBOSH NG1 & NG2 · NEBOSH Health & Safety Leadership Excellence · CSCS Black Card · Level 6 Diploma in Construction Site Management · IOSH · ISEP (environmental) · Temporary Works Supervisor & Coordinator · Lift Supervisor. Last reviewed: 29 August 2026.
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General guidance only. This article explains how the rules generally work in UK construction. It is not advice for your specific site, task or project, and it is not legal advice. Your own risk assessment, method statement and arrangements must be prepared and checked by a competent person for the actual work being done.