PSDP and PSCS Roles in Ireland: Who Does What?

An Irish construction project can involve a client, several designers and multiple contractors. The project supervisor roles make coordination across those parties explicit. The project supervisor for the design process, or PSDP, coordinates health and safety during design. The project supervisor for the construction stage, or PSCS, coordinates it during construction. The roles connect through plans, information and handover; appointing either one does not remove the separate duties of the client, designers or contractors.

The legal framework is the Safety, Health and Welfare at Work (Construction) Regulations 2013. The Health and Safety Authority's duty-holder guidance explains the appointments and relationships. This article focuses on who does what. The existing Construction Regulations 2013 guide owns the broader overview of the regulations.

Begin with the client's appointment decision

The client is the person for whom the project is carried out. The HSA client guidance says the client must, where the regulations require it, appoint a competent and adequately resourced PSDP in writing before design work begins, and a competent and adequately resourced PSCS in writing before construction begins. The 2013 Regulations specify when these appointments are required. Do not assume every minor job has the same appointment or notification requirements. Project complexity, more than one contractor, particular risk and duration can affect the legal analysis.

An appointment should identify the independent project, the person or organisation accepting the role and its scope. The appointee needs enough authority, people, knowledge and time to carry out the coordination work. Calling an architect the PSDP in a meeting does not replace a required written appointment. Nor does an appointment become effective because a form has a signature if the appointee lacks the resources to perform the role.

The client still needs to employ competent designers and contractors, supply necessary information, cooperate with the supervisors and deal with the safety file and plans as the regulations require. A project supervisor coordinates a stage; it does not absorb every duty held by others.

What the PSDP does during design

The HSA PSDP guidance describes the role as coordinating the application of the general principles of prevention during design. That means bringing designers' information together so significant construction and later-maintenance risks can be avoided or reduced where reasonably practicable. The PSDP does not simply collect drawings at the end.

A practical design-stage process asks what the structure will require people to build, inspect, clean, maintain and eventually alter. It asks whether a choice of materials, sequence, access or location creates a foreseeable serious risk and whether the design can change. Where risk remains, the PSDP coordinates how necessary information is communicated to the PSCS and others who will plan the work. A risk note that never reaches construction planning provides little protection.

The PSDP has duties concerning the preliminary safety and health plan where the relevant regulatory conditions apply. The HSA guidance describes projects with particular risk or the specified duration/person-day thresholds. The PSDP also prepares the safety file information for the completed structure. The safety file is meant to assist people doing future work, not to duplicate every construction-phase daily record.

The designer retains duties as a designer. The PSDP's coordination does not authorise a designer to ignore an unsafe design choice. Where several designers contribute, the supervisor needs a way to resolve gaps and communicate assumptions. If the appointment changes mid-project, record who carries forward the information and responsibilities.

What the PSCS does during construction

The PSCS coordinates the implementation of construction-stage safety requirements by contractors. The HSA's construction-stage plan guidance says the appointed PSCS should develop a suitable construction-stage safety and health plan before construction starts, using the preliminary information from the PSDP and adapting it to the actual project.

Coordination includes cooperation between contractors, work sequences, information exchange, checking safe procedures, restricted access and welfare arrangements as applicable. The HSA construction duty-holder guidelines set out a broader PSCS duty list. The PSCS also passes necessary information to the PSDP for the safety file. A construction-stage plan should respond to changes in design, work sequence, contractors and site conditions instead of remaining a tender document.

The PSCS is not automatically the employer of every worker on site. Each contractor retains its own legal duties to employees and others, including assessment, training and safe systems for its work. Coordination is still essential. One contractor may isolate a service needed by another; simultaneous operations can create hazards neither trade sees alone. The PSCS needs a mechanism for planning, communicating and resolving those interfaces.

Manage the interface between PSDP and PSCS

The boundary between design and construction is not a single document drop. Before work starts, the PSCS needs clear design assumptions, known residual risks, the preliminary plan where required and information about existing structures and services. During construction, the PSCS may uncover a condition that requires a design change. The PSDP and designers then need the new information so the design and safety file remain accurate.

A useful handover identifies open risk decisions, evidence still needed, who will obtain it and when a contractor may proceed. It distinguishes information from approval. A drawing note that says “contractor to assess” may be insufficient if a design decision can remove the hazard. Equally, a PSDP cannot choose the exact construction method for every contractor task without knowing the site and competence. The parties should discuss the risk at the point where it can best be controlled.

The HSA client guidance addresses the client's provision of the PSDP's plan to tenderers and the safety file at completion. The client should understand what information is being passed, to whom and whether it is usable. A safety file hidden in an unlabelled archive is unlikely to help future maintenance.

Keep notification distinct from appointment

Written project-supervisor appointment and HSA project notification are different matters. The HSA client page describes notification where construction is likely to exceed 500 person-days or 30 working days. The duty-holder guidelines describe the associated responsibilities. Do not conclude that a non-notifiable project needs no supervisors, or that sending a notification appoints them. Apply each test separately under the current regulation.

Projects on domestic dwellings have specific provisions. A homeowner should use the HSA's home-owner guidance to identify their duties rather than copy the process for a large commercial project. This page does not resolve a borderline project's duty-holder position from a short description. If the appointment test is unclear, check the actual work scope and current HSA guidance before work progresses.

Example: refurbishment with several trades

A client commissions a refurbishment involving a designer, structural alterations, electrical work and an asbestos-related issue. The client establishes whether and when PSDP and PSCS appointments are required, makes any required appointments in writing and gives the PSDP existing building information. The design team identifies access and structural risks. The PSDP coordinates design-stage controls and passes unresolved information to the PSCS. The PSCS plans the sequence of intrusive work, isolations, contractor interfaces and construction-stage arrangements. New information discovered on site returns to the designers and PSDP, and relevant final information goes into the safety file.

The example shows information flow. It does not decide whether a particular refurbishment is notifiable, what asbestos work is permitted or which company is competent for the roles. Those decisions need the project facts and current law.

For businesses comparing ways to organise construction information, evaluate Complys Ireland construction safety software and ask for a demonstration of current functionality. The commercial page owns software evaluation, while this article explains the duty-holder interface.