Across the construction industry, there’s a growing focus on mental health, wellbeing, and psychological safety. Yet on many sites, the conversation has traditionally centred on physical hazards, visible risks, and compliance-driven safety measures.
At CHAS, we work with organisations across the supply chain to raise standards in health and safety. Increasingly, one thing is clear: one of the most significant risks on site isn’t always visible.
It’s mental health.
The risk we don’t always see
Construction has made significant progress in improving physical safety. From PPE to site processes, the industry has worked hard to reduce incidents and protect workers.
Yet behind this progress sits a growing challenge.
Across Great Britain, around 964,000 workers are experiencing work-related stress, depression or anxiety, the leading cause of work-related ill health. It accounts for over half of all reported cases and leads to more than 22 million working days lost each year.
In construction, the picture is equally concerning. Around 79,000 workers report work-related ill health, with a significant proportion linked to stress, depression and anxiety. Research from the Chartered Institute of Building also shows that 94% of construction workers have experienced stress in the past year, alongside high levels of anxiety and depression.
This isn’t just a wellbeing concern, it directly impacts how safely people can perform at work.
The Health and Safety Executive is clear: these risks must be assessed and managed like any other hazard.
Why mental health affects safety on site
On a live construction site, with multiple trades, tight deadlines and constantly changing environments, mental health has a direct impact on performance.
Fatigue, stress and burnout can lead to:
- Reduced concentration
- Slower reaction times
- Poor decision-making
- Increased likelihood of errors or near misses
When someone is mentally exhausted, they are more vulnerable to making mistakes. In a high-risk environment like construction, even small errors can have serious consequences.
This is where the conversation needs to shift.
Mental health isn’t separate from safety; it’s a critical part of it.
What drives psychosocial risk in construction
On a construction site, psychosocial risks are often less visible, but no less real than physical hazards. They often build over time and directly affect how people think, react and perform.
Common examples include:
- Fatigue from long shifts, early starts and travel between sites
- Pressure to meet tight programme deadlines
- Working across multiple teams, contractors and environments
- Limited breaks or time to recover between physically demanding tasks
- Isolation, particularly for subcontractors or transient workers
These pressures are part of the day-to-day reality for many in construction. In some cases, workers report regular fatigue, feeling overwhelmed, or taking time off due to unmanageable workloads.
These aren’t isolated issues; they’re systemic challenges that affect how safely people can work.
What the HSE expects
The Health and Safety Executive is clear that work-related stress, depression and anxiety must be treated like any other workplace hazard.
This means employers should:
- Identify and assess sources of stress within their operations
- Put in place practical control measures
- Monitor and review how these risks are being managed
In construction, this includes considering how workloads, schedules, site conditions and management practices impact workers day to day.
At CHAS, we support organisations in embedding these responsibilities into everyday practice, helping ensure that both physical and mental health risks are properly managed.
This isn’t additional guidance; it’s part of an employer’s responsibility to protect health and safety.
Why site culture matters
One of the biggest barriers to addressing mental health in construction is stigma.
If workers don’t feel comfortable speaking up, risks remain hidden.
That’s why creating a strong site safety culture is key, not just one that focuses on physical hazards, but one that recognises the full picture of worker wellbeing.
This means:
- Encouraging open conversations about mental health
- Training managers to recognise signs of stress and fatigue
- Embedding wellbeing into daily site practices, not just policies
- Leading from the top, with visible commitment from leadership
Because safety doesn’t just live in procedures, it lives in behaviours, attitudes, and everyday decisions on site.
What good looks like on site
Addressing mental health as a safety issue doesn’t require complex programmes, it starts with practical, everyday actions.
Leadership
- Setting realistic project timelines and expectations
- Demonstrating visible commitment to both safety and wellbeing
Site management
- Monitoring fatigue and workload across teams
- Adjusting plans where pressure creates risk
- Creating space for regular, informal check-ins
Workforce
- Feeling confident to speak up about stress or fatigue
- Clear communication at the start of shifts
- Understanding that raising concerns is part of keeping sites safe
Small changes at each level can have a significant impact on overall site safety.
Moving beyond tick-box safety
Across construction, safety can still feel compliance-driven: forms completed, boxes ticked, standards met, often under time pressure.
But real safety goes further.
It’s about asking:
- Are our workers fit to work, not just physically, but mentally?
- Are workloads and deadlines realistic?
- Do our teams feel able to speak up when something isn’t right?
Recognising mental health as a safety issue helps shift the focus from paperwork to prevention.
Building safer construction sites, together
Improving mental health in construction isn’t about adding another layer of complexity, it’s about strengthening what safety already aims to do: protect people.
At CHAS, we believe that by acknowledging the link between mental wellbeing and physical risk, contractors and clients can take a more proactive, joined-up approach to safety across sites, projects and supply chains.
Because the safest sites aren’t just the ones with the best systems in place.
They’re the ones where people are supported, alert, and able to perform at their best.
A new definition of safety in construction
As the industry continues to evolve, so too must our understanding of risk.
Hard hats and high-vis will always be essential. But they’re only part of the picture.
If we’re serious about protecting construction workers, we need to recognise the risks we can’t always see.
Because mental health isn’t separate from safety.
It is safety.
