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Temporary Works Permit: What It Is and Why Every Contractor Needs One

A temporary works permit is one of those site documents that gets plenty of airtime in audits and very little attention on a Monday morning. If you're a contracts manager, site agent, or project manager carrying temporary works obligations under CDM 2015, understanding what a permit actually does — and why BS 5975:2024 makes it non-negotiable — could be the difference between a controlled site and a prohibition notice.

This article covers what a temporary works permit contains, how it fits into the BS 5975:2024 management framework, where the process typically breaks down, and what needs to be in place before any temporary structure is loaded or disturbed.

What a Temporary Works Permit Actually Is

A temporary works permit is a formal, written authorisation allowing a specific activity to proceed in relation to a temporary structure. It is not a method statement. It is not a RAMS. It is a controlled handover document that confirms a temporary structure has been installed, checked, and approved against the design intent before it is loaded, used, or altered.

The permit sits within the broader temporary works management system required by BS 5975:2024 — think of it as the final gate before work proceeds. It records that the right people have reviewed the right information, that the structure matches the design, and that any conditions or restrictions are clearly understood by those doing the work.

Without it, there is no formal record that anyone confirmed the structure was safe to use.

The Permit to Load and the Permit to Alter

Two types of permit are relevant to most contractor scenarios.

A permit to load confirms that a temporary structure — a propped excavation, falsework, or working platform — has been inspected against the approved design and is ready to receive the loads it was designed for. It is issued by the Temporary Works Coordinator (TWC) after the Temporary Works Supervisor (TWS) has completed a pre-use check.

A permit to alter is required whenever a change is proposed to a temporary structure already in use. Removing a prop, adjusting a waling, changing a surcharge arrangement, modifying a hoarding panel — any of these require a permit to alter. Without one, the change is unauthorised and potentially catastrophic.

Both types must be documented, signed, and retained as part of the project temporary works register.

Where the Permit Sits in the BS 5975:2024 Framework

BS 5975:2024 sets out the roles, responsibilities, and procedural controls that contractors must have in place for managing temporary works. The permit system is a core procedural control — not an optional extra.

Under the standard, the Designated Individual (DI) is responsible for ensuring the temporary works management system is established and followed. The TWC coordinates the design, checking, and permit process. The TWS carries out physical inspections and reports back to the TWC.

The permit process is what connects these roles in practice. The TWS inspects and records findings. The TWC reviews those findings against the approved design. The permit is issued only when the TWC is satisfied. No permit, no work proceeds.

If your project does not have a documented permit system, you are not compliant with BS 5975:2024. That matters because principal contractors and clients increasingly require evidence of compliance before work starts, and HSE inspectors reference the standard in enforcement decisions.

What the Permit Document Should Contain

A well-drafted temporary works permit is specific, not generic. It references the actual structure, the actual design, and the actual site conditions at the time of inspection.

At a minimum, a temporary works permit should include:

  • Project name, location, and date
  • A description of the temporary structure and its reference number in the design register
  • Design document references (calculation reference, drawing number, revision)
  • A list of inspection items checked against the design
  • Any restrictions or conditions attached to use (maximum surcharge, maximum load, exclusion zones)
  • Name and signature of the TWS completing the inspection
  • Name and signature of the TWC issuing the permit
  • Date and time of issue
  • A clear statement of what is and is not authorised

Some contractors include a section covering conditions that must be maintained during use — monitoring frequencies for propped excavations, maximum vehicle weights on a working platform, and so on. That is good practice and directly supports the ongoing inspection regime that BS 5975:2024 requires.

Why Contractors Get This Wrong

The permit system fails in predictable ways. Knowing them makes them easier to avoid.

The permit becomes a tick-box

When permits are issued without a genuine inspection, they become worthless paper. The TWS signs off without physically checking the structure against the design. The TWC countersigns without reviewing the findings. The permit exists but provides no real control.

This is a systemic failure, not a paperwork one. It usually means the TWS does not have the design documents on site, does not know what to check, or is under programme pressure to get the structure into use quickly.

The permit is never updated when conditions change

A permit to load issued on day one does not cover a change made on day fifteen. If a prop is removed to allow plant access and no permit to alter is raised, the structure is operating outside its approved condition — and everyone working near it is exposed to an uncontrolled risk.

There is no permit at all

On smaller projects, or where the temporary works management system has not been properly set up, the permit stage gets skipped entirely. The structure gets built, someone has a look, and work starts. This is common. It is also the scenario that appears repeatedly in HSE enforcement cases and CROSS-UK safety intelligence reports.

Roles are not defined

If no one has been formally appointed as TWC and TWS, there is no one with the authority or responsibility to issue a permit. The permit system cannot function without the role structure that BS 5975:2024 requires.

The Permit System and CDM 2015

CDM 2015 places duties on principal contractors to manage and coordinate health and safety throughout the construction phase. Temporary works are a significant source of structural risk on most sites, and the Construction Phase Plan must address how those risks are managed.

A functioning permit system is part of that management. It provides a documented audit trail showing that temporary structures were checked before use and that changes were controlled. In the event of an incident, the presence or absence of a permit record is one of the first things investigators look for.

CDM 2015 does not prescribe the exact format of a permit — BS 5975:2024 does. Using BS 5975:2024 as the framework for your temporary works management system is the most defensible approach under CDM 2015 precisely because it is the recognised industry standard.

Setting Up a Permit System That Actually Works

Getting the permit process right is not complicated, but it does require some upfront work at project mobilisation.

Step 1: Appoint your roles. The DI, TWC, and TWS must be formally appointed in writing before any temporary works design begins. These appointments should be recorded in the project temporary works procedure.

Step 2: Set up the design register. Every temporary works element needs a register entry with a unique reference number. The permit will reference this number, so the register must be current before permits are issued.

Step 3: Get design documents on site. The TWS cannot inspect against a design they do not have. Issue-ready drawings and any design conditions must be accessible to the TWS before the inspection takes place.

Step 4: Define the inspection checklist. The permit form should include a checklist derived from the design. For a propped excavation, this might cover prop spacing, prop size, bearing plates, and wedge tightness. For a working platform, surface condition, edge protection, and maximum axle load signage.

Step 5: Train the TWS. The person doing the inspection needs to understand what they are looking for and why. If your appointed TWS is new to the role, one-to-one mentoring from an experienced engineer can close that gap quickly.

Step 6: Retain the records. Permits must be kept as part of the project health and safety file. They are evidence of compliance and, in the event of an incident, potentially critical legal documents.

When You Need External Support

Not every contractor has in-house temporary works competency. A contracts manager mobilising a new groundworks project may find the TWC role is unfilled, the procedure has not been set up, and no one on site is clear on what a permit to load should contain.

That is a real and common scenario. The right response is to bring in external support before work starts — not after a near-miss.

Temporary Works Consulting & Design Ltd provides exactly this kind of support to UK contractors. Services cover BS 5975:2024 procedure setup, role definition, design register establishment, RAMS and ITP review, and full design packs for the structures that need them. All delivery is remote with fast turnaround, and fixed-price quotes are agreed upfront. You can get a quote via the web form or WhatsApp.

If you have a newly appointed TWC or TWS who needs to understand the permit process in practice, one-to-one mentoring and tutoring sessions are available through the training and tutoring service.

Common Questions About Temporary Works Permits

Does every temporary structure need a permit?

BS 5975:2024 requires a permit for any temporary works element that poses a significant risk if it fails or is used incorrectly. In practice, this covers most engineered temporary structures: propped excavations, falsework, working platforms, needling, and hoardings above a certain height. Lower-risk items may be covered by a simpler inspection record rather than a full permit, but this should be defined in your project temporary works procedure.

Who can issue a temporary works permit?

The permit to load is issued by the Temporary Works Coordinator after reviewing the inspection carried out by the Temporary Works Supervisor. The TWC must be formally appointed and have competence appropriate to the complexity of the work.

What happens if work starts without a permit?

Work proceeding without a permit is a breach of the BS 5975:2024 management framework and potentially a breach of CDM 2015 duties. It exposes the principal contractor, the TWC, and the DI to enforcement action — and leaves no record that the structure was safe to use when work started.

Can the same person be the TWC and the TWS?

On smaller, lower-risk projects, BS 5975:2024 allows the roles to be combined, provided the person has the appropriate competence. On higher-risk or more complex projects, the roles should be separate to provide an independent check.

How long should permits be retained?

Permits are part of the project health and safety file and should be retained for the duration of the project. For structures that remain in place for extended periods, many contractors retain permit records for the life of the project plus a defined period after completion. Your project temporary works procedure should specify the retention requirement.

Does a permit replace the method statement?

No. The method statement or RAMS describes how the work will be carried out. The permit confirms that the temporary structure is in the correct condition to allow that work to proceed safely. Both documents are required and serve different purposes.

What is the difference between a permit and an inspection record?

An inspection record documents the findings of a check. A permit is an authorisation to proceed based on those findings. Some permit forms combine both into a single document, which is acceptable provided all required information is captured and the authorisation element is clearly distinguished from the inspection record.

Get the Permit Process Right Before Work Starts

A temporary works permit is not bureaucracy for its own sake. It is the documented evidence that a qualified person confirmed a temporary structure was safe to use before anyone was put at risk by it. Get the process set up properly at mobilisation, appoint your roles, and make sure your TWS knows what they are checking and why.

If you need support setting up a compliant temporary works management system — permit procedures, design registers, and the design packs to back them up — Temporary Works Consulting & Design Ltd can help. Fixed-price quotes, fast turnaround, and direct access to a chartered engineer with over 26 years of site-side experience.

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