When Should a Risk Assessment Be Carried Out, How Do You Identify Risks, and What Happens If You Don’t?

On a typical construction site, overlooked hazards can quickly escalate into accidents, delays, or enforcement action. For teams managing multiple contractors, knowing exactly when and how to assess risks is not just a compliance requirement it is a practical way to protect people and keep projects on track.

What You’ll Learn:

• When risk assessments are legally and practically required
• Straightforward ways to identify hazards and risks
• The serious consequences of skipping or delaying assessments
• How to make risk assessment part of effective contractor management

Introduction:

Risk assessment is the systematic process of spotting potential hazards, evaluating the likelihood and severity of harm, and deciding on control measures. It should happen before work starts and whenever circumstances change. This is especially vital in environments with many contractors, where coordination and communication are critical.

Heresafe helps organisations turn risk assessments into a living part of site operations by linking them to contractor compliance, method statements, permits, and real-time visibility, reducing the chance of gaps.

When Risk Assessments Must Be Carried Out

Under the Management of Health and Safety at Work Regulations 1999, employers must carry out a suitable and sufficient assessment of risks to employees and anyone else who may be affected by their work.  In practice, carry them out:

• Before starting a new project, phase, or task
• When introducing new plant, equipment, substances, or working methods
• Following significant changes to site layout, personnel, or conditions
• When significant changes affect the work, site or people involved
• When an incident, near miss or new information suggests the existing controls may be inadequate

Those carrying out the work are responsible for assessing and controlling the risks it creates. If they employ five or more people, the significant findings must be recorded. On projects involving multiple contractors, the principal contractor must coordinate health and safety arrangements and ensure relevant information is communicated between teams.  Regular reviews keep them relevant as projects evolve. Dynamic assessments can supplement formal ones for rapidly changing situations.

How to Identify Risks Effectively

Identifying hazards and assessing the risks they create starts with a thorough examination of the workplace and work activities.  Practical steps include:

• Walking the site and observing work activities
• Consulting workers, contractors, and supervisors who have direct experience
• Reviewing manufacturer information, previous incident reports, and industry guidance
• Considering who might be harmed (employees, contractors, visitors, or the public) and how
• Evaluating existing controls and whether they are adequate

Focus on significant hazards first – those with a realistic potential to cause harm.  Tools such as checklists for common construction risks (falls, dust, manual handling and injuries caused by vehicles, equipment or falling objects) can help ensure nothing important is missed. In contractor-heavy settings, early involvement of incoming teams improves accuracy and ownership.

The Serious Consequences of Not Doing Risk Assessments

Failing to carry out or update risk assessments can lead to:

• Higher accident and ill-health rates — Uncontrolled hazards increase injuries from falls, machinery, or exposure to harmful substances, as well as long-term conditions.
• Legal and financial penalties — Breaches often result in enforcement notices, fines, prosecutions, higher insurance costs, and civil claims.
• Project disruption — Incidents cause stoppages, investigations, rework, and strained relationships with clients and supply chains.
• Reputational damage — Poor safety performance affects tender success and the ability to attract reliable contractors.
• Wider operational problems — Weak risk management undermines related processes such as permits and inductions, leading to inefficiency and low morale.

These outcomes affect not only workers but also the organisations responsible for site safety.

Making Risk Assessment Work in Practice

Effective assessments are clear, proportionate, and actively used on site. They should link to method statements, permits to work, site diaries, and daily briefings. Digital tools can simplify sharing, version control, and integration with contractor records, making it easier to maintain up-to-date controls across multiple teams.

Heresafe supports this by centralising risk-related documentation, automating review reminders, and providing dashboards that give visibility into contractor compliance and on-site status. This helps organisations move from reactive to proactive risk management.

Conclusion:

Risk assessments should be carried out before work begins and reviewed whenever significant changes occur. Identifying risks thoroughly and acting on findings is fundamental to protecting workers and maintaining project momentum. Neglecting this process carries serious safety, legal, and commercial consequences. By embedding strong risk assessment practices within contractor management systems, businesses can create safer, more efficient sites.

Ready to strengthen your approach?

Book a contractor management software demo to see how Heresafe helps organisations replace spreadsheet-based contractor management with automated document tracking, approval workflows, live site visibility and clearer compliance records.

Contact hello@heresafe.com.