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PSDP and PSCS FAQ: Understanding Statutory Appointments on Construction Projects

Comprehensive FAQ on PSDP (Project Supervisor for Design Process) and PSCS (Project Supervisor for Construction Stage) appointments under the Construction Regulations 2013.

Published: April 27, 2026Read time: 11 min read

The PSDP and PSCS are statutory appointments required under the Construction Regulations 2013 for notifiable construction projects. These roles are essential for coordinating safety throughout the project lifecycle. This guide explains what these roles are, when they're required, and what they involve.

Understanding Notifiable Projects

Under the Safety, Health and Welfare at Work (Construction) Regulations 2013, a project is "notifiable" if it meets any of the following criteria:

  • It involves a particular risk (as defined in Schedule 1 of the Regulations)
  • It is scheduled to last longer than 30 working days
  • It involves more than 500 person days of work
  • It involves more than one contractor

For notifiable projects, both a PSDP and a PSCS must be appointed. If your project meets any of these criteria, these appointments are mandatory.

The PSDP: Project Supervisor for the Design Process

The PSDP is a statutory appointment required during the design phase of a notifiable project. The client must appoint a competent PSDP in writing before design work starts.

Key Responsibilities of the PSDP

  • Hazard identification: Identify hazards arising from the design or from the technical, organisational, planning or time-related aspects of the project
  • Risk elimination/reduction: Where possible, eliminate those hazards or reduce the risk
  • Communication: Communicate necessary control measures, design assumptions or remaining risks to the PSCS so they can be dealt with in the Safety and Health Plan
  • Designer coordination: Ensure that the work of designers is coordinated to ensure safety, and organize cooperation between designers
  • Safety and Health Plan: Prepare a written Safety and Health Plan for any notifiable project and deliver it to the client prior to tender
  • Safety File: Prepare a Safety File for the completed structure and give it to the client
  • Compliance notification: Notify the HSA and client of non-compliance with any written directions issued

The PSDP essentially ensures that safety is considered from the earliest design stages, before hazards become expensive and difficult to control on site.

The PSCS: Project Supervisor for the Construction Stage

The PSCS is a statutory appointment required during the construction phase of a notifiable project. The client must appoint a competent PSCS in writing before construction begins.

Key Responsibilities of the PSCS

  • Hazard coordination: Coordinate the identification of hazards, the elimination of hazards, or the reduction of risks during construction
  • Safety and Health Plan: Develop the Safety and Health Plan initially prepared by the PSDP before construction commences
  • Contractor coordination: Coordinate the implementation of the Construction Regulations by contractors
  • Cooperation: Organize cooperation between contractors and the provision of information
  • Accident reporting: Coordinate the reporting of accidents to the HSA
  • HSA notification: Notify the HSA before construction commences where construction is likely to exceed 500 person days or 30 working days
  • Safety representative: Provide information to the site safety representative
  • Compliance monitoring: Monitor the compliance of contractors and take corrective action where necessary
  • Welfare facilities: Coordinate the provision and maintenance of welfare facilities
  • Compliance notification: Notify the HSA and the client of non-compliance with any written directions issued

The PSCS is essentially the safety coordinator for the construction phase, responsible for ensuring that all contractors work safely and in compliance with the Construction Regulations.

The Safety and Health Plan

The Safety and Health Plan is a key document that sets out how safety will be managed during construction. It is a living document that evolves throughout the project.

PSDP's Role in the Safety and Health Plan

The PSDP prepares a preliminary Safety and Health Plan during the design phase. This plan is based on the design-stage hazards and risks and is delivered to the client prior to tender. It provides a framework for the PSCS to develop the full plan during construction.

PSCS's Role in the Safety and Health Plan

The PSCS develops the preliminary Safety and Health Plan into the full Safety and Health Plan before construction starts. This includes:

  • Site-specific information (access, utilities, environmental conditions)
  • Contractor details and responsibilities
  • Construction-stage hazards and risks
  • Control measures and safe work methods
  • Coordination arrangements between contractors
  • Emergency procedures
  • Welfare facilities

The Safety and Health Plan must be available to all contractors and workers on site. It is updated as the project progresses and new hazards or risks emerge.

The Safety File

The Safety File is a document prepared by the PSDP (with information provided by the PSCS) that contains information relevant to the safety of workers who will work on the structure in the future. It is handed over to the client on project completion.

The Safety File typically includes:

  • As-built drawings and specifications
  • Information about hazards and how they were controlled
  • Maintenance and cleaning procedures
  • Information about materials used (e.g., asbestos, hazardous substances)
  • Emergency procedures
  • Structural information relevant to future work

The Safety File is essential for anyone who will work on the structure in the future—whether for maintenance, refurbishment, demolition, or other work. It ensures that future workers are aware of hazards and how to manage them safely.

Competence Requirements

Both the PSDP and PSCS must be competent. Competence means having the knowledge, skills, experience, and training to carry out the role safely and effectively. The Regulations require that the person appointed must have:

  • Knowledge and understanding of the Construction Regulations 2013
  • Knowledge and understanding of construction safety and health
  • Experience in the type of project being undertaken
  • Ability to identify hazards and assess risks
  • Ability to coordinate and communicate effectively with designers, contractors, and workers
  • Ability to manage the Safety and Health Plan and Safety File

The client is responsible for ensuring that the PSDP and PSCS appointed are competent. If they are not, the client is in breach of the Regulations.

Best Practice: Effective PSDP and PSCS Appointments

To ensure effective PSDP and PSCS appointments:

  • Appoint early: Appoint the PSDP before design work starts and the PSCS before construction begins. Early appointment allows them to influence decisions and prevent problems.
  • Ensure competence: Verify that the person appointed has the knowledge, skills, and experience to carry out the role effectively.
  • Provide support: Give the PSDP and PSCS the information, resources, and access they need to carry out their role.
  • Communicate clearly: Ensure clear communication between the PSDP, PSCS, designers, contractors, and workers.
  • Involve contractors: Involve contractors in the development of the Safety and Health Plan. Their input is essential for practical, effective planning.
  • Review and update: Review and update the Safety and Health Plan as the project progresses and new hazards or risks emerge.

Frequently Asked Questions

What is the difference between a PSDP and a PSCS?

The PSDP (Project Supervisor for the Design Process) works during the design phase, coordinating designer safety and preparing the Safety and Health Plan. The PSCS (Project Supervisor for the Construction Stage) works during construction, coordinating contractor safety and implementing the Safety and Health Plan. Both are statutory appointments required under the Construction Regulations 2013 for notifiable projects. The PSDP hands over to the PSCS at the start of construction.

When do I need to appoint a PSDP and PSCS?

You must appoint both for projects that: (1) involve a particular risk, (2) are scheduled to last longer than 30 working days or 500 person days, or (3) involve more than one contractor. The PSDP must be appointed in writing before design work starts. The PSCS must be appointed in writing before construction begins. If your project meets any of these criteria, both appointments are mandatory under the Construction Regulations 2013.

What are the key responsibilities of a PSDP?

The PSDP must: (1) Identify hazards arising from design or project aspects, (2) Eliminate hazards or reduce risks where possible, (3) Communicate control measures and risks to the PSCS, (4) Ensure coordination of designers' work for safety, (5) Prepare the Safety and Health Plan, (6) Prepare the Safety File for handover to the client, (7) Notify the HSA and client of non-compliance with directions. The PSDP essentially ensures that safety is considered from the earliest design stages.

What are the key responsibilities of a PSCS?

The PSCS must: (1) Coordinate hazard identification and risk reduction during construction, (2) Develop the Safety and Health Plan from the PSDP's preliminary plan, (3) Coordinate implementation of Construction Regulations by contractors, (4) Organize cooperation between contractors, (5) Coordinate accident reporting to the HSA, (6) Notify the HSA before construction starts (if applicable), (7) Coordinate site safety representative appointment, (8) Coordinate welfare facilities, (9) Monitor contractor compliance and take corrective action, (10) Provide information to the Safety File. The PSCS is essentially the safety coordinator for the construction phase.

Can the same person be both PSDP and PSCS?

No. The PSDP and PSCS are separate statutory appointments with different responsibilities during different project phases. However, the same organization (e.g., a safety consultancy) can provide both services, with different individuals fulfilling each role. The key is that the roles are distinct and the responsibilities are clearly separated.

What is the Safety and Health Plan and who prepares it?

The Safety and Health Plan is a document that sets out how safety will be managed during construction. The PSDP prepares a preliminary Safety and Health Plan during design, based on the design-stage hazards and risks. The PSCS then develops this into the full Safety and Health Plan before construction starts, incorporating site-specific information, contractor details, and construction-stage hazards. The Safety and Health Plan must be available to all contractors and workers on site.

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