Permit to work: meaning in UK construction

A permit to work is a formal, written authorisation to carry out a defined piece of high-risk work. It is issued by a competent authorised person, only once the controls it names have been confirmed in place, and it is valid for a limited period.

It is not a substitute for a risk assessment or a method statement. It sits on top of them, as a final gate. The RAMS describe how the job will be done safely; the permit confirms that on this day, in this location, the conditions described are actually true before anyone starts.

What it is used for

The tasks where a permit is standard practice are the ones where getting it wrong is not recoverable: hot works, confined space entry, work on or near live electrical systems, excavation near buried services, roof work, and lifting over occupied areas.

The permit names the work, the location, the time window, the specific controls required, the isolations that must be in place, and the person accountable. It is signed on issue, held by the crew while the work runs, and signed again on close-out.

Why the separation matters

The single most important feature of a permit system is that the issuer and the worker are different people. A permit signed by the person doing the job is a formality with no independent check behind it, and it removes the whole reason the system exists.

The second feature is the expiry. Permits are time limited so that conditions get re-checked rather than assumed. Work that overruns needs a fresh permit, not an extension pencilled onto the old one.

Where it goes wrong

Permits left open is the most common finding. Work finishes, the crew leaves, and nobody closes the permit, so the record shows high-risk work still live on a site that is empty. For hot works this matters more than paperwork: the fire watch period after the work stops is part of the control, and closing out is what confirms it happened.

The other recurring failure is the permit that describes controls nobody checked. A permit is only worth the inspection behind it, and an issuer who signs a stack of them at the start of a shift without walking the job has created a document that will not survive an investigation.

Keeping issued and closed permits against the project, with the assessments and methods they authorise, is what makes the trail reconstructable months later. That is what Sync’s compliance management holds.

Common questions

Who is allowed to issue a permit?

Someone competent and specifically authorised to do it, and never the person carrying out the work. The separation is the point: the permit is an independent check that the controls are actually in place before work starts, and that check is worthless if the person doing the job signs their own.

Is a permit to work a legal requirement?

Not by that name. What the law requires is a safe system of work proportionate to the risk. For hot works, confined space entry, work on live systems and similar, a permit is the recognised way of delivering that, and its absence would be very hard to defend after an incident.

How long does a permit last?

As long as it says on it, and no longer. Permits are deliberately time limited, usually to a shift or a defined window, so that conditions are re-checked rather than assumed. If the work overruns, the permit is reissued after a fresh check.

What does closing out a permit involve?

Confirming the work has finished, the area is safe, equipment has been removed, and any temporary isolations have been restored. For hot works this includes the fire watch period after the work stops. An open permit with nobody on site is a common audit finding.

Permit to work