Digital permit to work in construction: types, benefits and audit trails

What is a permit to work?

A permit to work is a formal written document that authorises a specific person or team to carry out a specific task, in a specific location, at a specific time, subject to stated safety precautions. It is not a general permission to work on site. It is an authorisation for a particular high-risk activity.

The permit system serves three purposes. First, it forces a formal risk assessment before the work begins. Second, it ensures that the people doing the work and the people authorising it have both considered the hazards and agreed on the controls. Third, it creates a record that the work was authorised and that the required precautions were in place.

In UK construction, permits to work are not a legal requirement in themselves, but they are considered best practice for high-risk activities, and HSE expects to see a permit system in operation on most construction sites. For a broader overview of what permits HSE looks for during inspections, see our permit to work construction guide.

Types of permits in construction

The specific permits your site requires depend on the activities being carried out, but the most common types in UK construction are:

Hot works permit

Required for any activity that produces sparks, flames, or heat: welding, cutting, grinding, brazing, soldering, and the use of blowtorches. Hot works are one of the most common causes of fire on construction sites. The permit should specify the location, duration, fire precautions (fire extinguishers, fire watch), and the time after completion during which the area must be monitored (typically 60 minutes).

Confined space entry permit

Required before any person enters a confined space, such as a tank, sewer, pit, silo, or any enclosed area where there is a foreseeable risk from hazardous atmospheres, engulfment, or restricted means of escape. The Confined Spaces Regulations 1997 require a safe system of work, and a permit is the standard way to document and enforce it.

Working at height permit

Required for work at height where additional controls beyond standard edge protection are needed. This includes work on fragile roofs, work near unprotected edges, and work requiring specialist access equipment. The Work at Height Regulations 2005 require that work at height is properly planned, supervised, and carried out by competent people.

Excavation permit

Required before breaking ground, particularly where there is a risk of striking underground services (gas, electric, water, telecoms). The permit should confirm that service drawings have been checked, that a CAT and Genny survey has been carried out, and that the appropriate shoring or battering has been specified.

Electrical isolation permit

Required when work involves isolating electrical supplies. The permit confirms that the correct circuits have been isolated, tested dead, and locked off, and that the people who isolated them are identified.

Problems with paper permits

Paper permit systems have been the standard in construction for decades. They work in principle, but they fail in practice in predictable ways:

• Permits not closed out: A hot works permit is issued in the morning but never formally closed at the end of the day. The fire watch period is not recorded. There is no evidence that the post-work inspection was carried out.
• Illegible or incomplete forms: Handwritten permits with missing fields, illegible signatures, and vague location descriptions ("near the east wall").
• No real-time visibility: The site manager has no way of knowing, from the office, how many active permits are currently open on site without physically checking the permit book.
• Lost paperwork: Permits misplaced, damaged by weather, or filed incorrectly. When HSE asks to see the permit for a specific activity on a specific date, finding it can be difficult.
• No automatic expiry: A permit issued for one day continues to be used the next day because nobody enforced the expiry. The conditions may have changed overnight.
• Authorisation gaps: Permits signed by people who are not authorised to issue them, because the paper form does not enforce the approval chain.

How digital permits work

A digital permit system replaces the paper form with an electronic workflow. The process typically runs as follows:

1. Request: The person requesting the permit fills in a digital form on a phone or tablet. Required fields are enforced by the system. You cannot submit a hot works permit without specifying fire precautions.
2. Approval: The request is routed to the authorised person (typically the site manager or H&S manager) for review and approval. The approver can approve, reject, or request changes, all from their phone.
3. Issuance: Once approved, the permit is active. The system records who approved it, when, and with what conditions.
4. Monitoring: Active permits are visible on a dashboard. The site manager can see at a glance how many permits are open, where they are, and when they expire.
5. Close-out: When the work is complete, the permit holder closes the permit digitally, confirming that post-work checks (fire watch, atmospheric monitoring) have been carried out. The system timestamps the close-out.
6. Automatic expiry: If the permit is not closed by its expiry time, the system flags it automatically.

AttendIQ includes standard permit templates for hot works, confined space, working at height, and excavation, built in. Sites can customise the templates or create their own for specific activities.

Approval workflows

One of the biggest advantages of digital permits is enforced approval chains. On paper, anyone can sign a permit form. Digitally, the system can restrict permit approval to specific roles.

A typical approval workflow:

• Standard permits (hot works, working at height): approved by the site supervisor or site manager
• Higher-risk permits (confined space, electrical isolation): require approval from the site manager or H&S manager specifically
• Extended-duration permits: require re-approval at defined intervals

The system can also enforce prerequisites. A confined space entry permit might require the applicant to confirm that atmospheric monitoring has been completed and the results attached. A hot works permit might require a fire extinguisher check to be logged. These conditions cannot be bypassed or skipped.

The audit trail advantage

Every digital permit creates a complete, timestamped audit trail: who requested it, who approved it, when it was issued, when it was closed, and whether any conditions were changed during the permit period. This audit trail is stored automatically and is searchable by date, by permit type, by location, or by person.

When HSE asks to see the permit for a hot works activity that took place three months ago, you can produce it in seconds, complete with the approval chain, the stated precautions, the close-out confirmation, and the post-work inspection record. With paper, that same request might take hours of searching through filing cabinets.

The audit trail also protects you in the event of an incident. If a fire starts in an area where hot works were carried out, you can demonstrate that a permit was issued, that fire precautions were specified, that a fire watch was maintained, and that the area was inspected after work was complete. That evidence is significantly more compelling than a handwritten form with a smudged signature. For more on how to prepare for an HSE visit, see our how AttendIQ works page.

Implementing digital permits

Moving from paper to digital permits is straightforward. The key steps are:

1. Define your permit types: Which activities on your sites require permits? Start with the standard types (hot works, confined space, height, excavation) and add any site-specific permits.
2. Set up approval chains: Who can approve each type of permit? Map this to your existing roles and responsibilities.
3. Configure templates: Use standard templates or customise them to match your existing permit forms. Workers and supervisors should recognise the content.
4. Train supervisors: The approval process happens on their phone or tablet. A 15-minute walkthrough is typically sufficient.
5. Run parallel for one week: Issue paper and digital permits simultaneously for one week to build confidence, then drop paper.

The result is a permit process that is faster to initiate, impossible to lose, automatically enforced, and fully auditable. For a construction industry that still loses time and evidence to paper-based safety systems, that is a significant improvement.