Health and safety management in construction FAQs

Health and safety in construction refers to the systems, controls, and behaviours that prevent accidents, injuries, and ill health on construction sites. It involves identifying hazards, assessing risks, and implementing measures to protect workers, contractors, and the public throughout all stages of a project.

Key elements include:

• Legal compliance with duties under the Health and Safety at Work etc. Act 1974, CDM Regulations 2015, and associated standards.
• Safe planning and design, ensuring risks are eliminated or reduced before work begins.
• Site management, including inductions, supervision, communication, and coordination between duty holders.
• Use of safe systems of work, such as scaffolding standards, permit-to-work systems, and control of hazardous substances.
• Provision of training, PPE, and welfare facilities.
• Monitoring and review to maintain ongoing safety and address changing risks.

Health and safety is crucial in construction because the sector consistently experiences some of the highest levels of fatal and serious injury.

According to the HSE, 35 worker deaths occurred in construction in 2024/25, making it the industry with the highest number of fatalities in Great Britain. The HSE also estimates that 40.1 million working days were lost in 2024/25 due to work-related injury and ill health across all sectors.

Strong health and safety practices help prevent accidents, protect workers and the public, ensure legal compliance, and reduce costly disruption to projects.

Health and safety in construction has improved significantly since the introduction of the Health and Safety at Work etc. Act 1974. The rate of fatal injuries at work fell by around 88% between 1974 and 2019/20.

Non-fatal injuries have also declined, with employer-reported injury rates showing a continuing downward trend as safer systems of work, training, and equipment become more widespread.

Common construction hazards include working at height, moving plant and vehicles, falls, slips and trips, electricity, structural collapse, hazardous substances (e.g., dust, chemicals, asbestos), manual handling, noise and vibration, and confined spaces.

These hazards make construction one of the highest-risk industries and require robust controls to prevent harm.

The five main types of safety signs used in construction are:

1. Prohibition signs – indicate actions that are not allowed (e.g., “No entry”).
2. Mandatory signs – specify actions that must be taken (e.g., “Wear hard hat”).
3. Warning signs – highlight hazards (e.g., “Danger: high voltage”).
4. Safe condition signs – show safety information such as escape routes or first aid.
5. Fire safety signs – identify fire equipment and fire-related instructions.

The 20-20-20 rule is a visual safety check that helps workers stay aware of their surroundings.

Every 20 minutes, workers pause to look 20 feet (about 6 metres) around them for 20 seconds to identify any new or changing hazards, such as moving plant, unstable materials, or exclusion zones. It encourages situational awareness and early hazard spotting on dynamic construction sites.

The Health and Safety Executive (HSE) oversees and enforces health and safety law in the construction industry.

The HSE’s role includes setting regulations and standards, providing guidance to duty holders, inspecting construction sites, investigating accidents and unsafe practices, and taking enforcement action where necessary. The HSE also analyses industry data to identify emerging risks and promote improvements across the sector.

The Building Safety Act 2022 strengthens health and safety duties for higher-risk buildings by introducing a stricter, proactive safety regime across a building’s full lifecycle.

For buildings at least 18 metres or 7 storeys high with multiple residential units, it creates clear legal roles, including the Accountable Person and Principal Accountable Person, who are responsible for managing fire and structural safety risks. Duty holders must produce and maintain a Safety Case Report, keep a Golden Thread of accurate safety information, engage residents on safety issues, and report serious risks through Mandatory Occurrence Reporting.

The Act also introduces new regulatory Gateway checks at planning, construction, and completion, gives the Building Safety Regulator stronger enforcement powers, and extends time limits for claims relating to defective work.

Everyone involved in a construction project has responsibilities, but key duty holders are defined in UK law:

• Clients – ensure projects are planned, managed, and resourced so work can be carried out safely.
• Principal Designers – manage health and safety risks during the design phase and coordinate designers.
• Designers – eliminate or reduce risks through safe design.
• Principal Contractors – plan, manage, and coordinate construction work on site.
• Contractors – carry out work safely and follow the construction phase plan.
• Workers – take reasonable care of themselves and others, follow site rules, and use equipment properly.

These responsibilities sit under the Health and Safety at Work etc. Act 1974 and the CDM Regulations 2015, which place duties on organisations and individuals to ensure construction work is carried out without harm.

Under CDM 2015, domestic and commercial clients are treated differently.

A domestic client (someone having work done on their home) has their client duties automatically transferred. If there is one contractor, the contractor takes the duties; if there is more than one, the Principal Designer takes them (or the Principal Contractor if no Principal Designer is appointed).

A commercial client must actively fulfil all client duties, including appointing duty holders, allowing sufficient time and resources, and ensuring key documents such as the Construction Phase Plan and Health and Safety File are in place.

Domestic client duties are passed on, while commercial clients must manage them directly.

Effective health and safety management in construction is planning work to eliminate or reduce risks, coordinating duty holders under the CDM Regulations, ensuring competent workers, providing safe systems of work, maintaining clear communication, monitoring site conditions, and continually reviewing performance. It integrates legal compliance, risk assessment, supervision, and worker engagement to ensure projects are carried out safely from design through to completion.

Pre-Construction Information (PCI) is prepared before construction starts, usually by or on behalf of the client. It brings together relevant health and safety information about the site, existing structures, known hazards, and design risks so that designers and contractors can plan the work safely.

The Construction Phase Plan (CPP) is prepared before work begins on site by the principal contractor (or the contractor on single-contractor projects). It sets out how health and safety will be managed during the construction phase, including site rules, risk controls, welfare arrangements, emergency procedures, and coordination between contractors.

PCI informs safe planning, while the Construction Phase Plan explains how safety will be managed during the build.

A Construction Phase Plan (CPP) is a site-specific health and safety plan that explains how risks will be managed during the construction phase of a project.

Under the Construction (Design and Management) Regulations 2015 (CDM 2015), a CPP is required before construction work starts on every project, regardless of size or duration.

The plan must set out:

• Key health and safety arrangements
• Construction phase risks and how they will be controlled
• Site rules, emergency procedures, and welfare arrangements
• How work will be co-ordinated and supervised

For small, low-risk projects the plan can be brief; for larger or higher-risk projects it must be more detailed.

A Construction Phase Plan is a legal requirement that must be in place before work begins, setting out how construction will be carried out safely.

A construction project must be notified to the HSE using an F10 form when it meets either of the following thresholds under CDM 2015:

• The work is expected to last more than 30 working days and have more than 20 workers on site at any one time, or
• The work is expected to exceed 500 person-days of construction work.

The notification must be submitted before construction work starts and kept up to date if project details change.

Notify the HSE if the project is large or long enough to meet either time-and-workers or total person-days thresholds.

The Health and Safety File is a permanent record of information needed to safely operate, maintain, alter, or demolish a building after construction work is completed.

Under the Construction (Design and Management) Regulations 2015 (CDM 2015), it must include relevant details such as:

• Key design and construction information
• Residual risks that cannot be eliminated
• Information on materials, systems, and equipment
• Safe maintenance and inspection requirements

The Principal Designer is responsible for preparing, reviewing, and updating the Health and Safety File during the project. Once construction is complete, the file must be handed over to the client, who is then responsible for keeping it available, up to date, and accessible for future work.

The Principal Designer creates the Health and Safety File, and the client owns and maintains it after handover.

In construction, competence means having the skills, knowledge, training, experience, and behaviours needed to carry out work safely and correctly.

Competence is verified by checking appropriate qualifications and training (such as trade skills and health and safety training), experience in similar work, and any cards or certifications required for the role. It also involves confirming that workers understand site rules, risk assessments, and method statements, usually through inductions and task briefings.

For contractors, competence is further assessed through pre-qualification checks, reviewing safety policies, accident history, risk assessments, and supervision arrangements. Ongoing supervision, monitoring of performance, and refresher training are used to confirm competence is maintained throughout the project.

A site induction must provide anyone new to site with the essential information they need to work or visit safely. It should cover the nature of the work and site layout, key hazards and control measures, site rules and safe working practices, required PPE, and traffic and pedestrian routes.

The induction must explain emergency arrangements, including fire procedures, alarms, muster points, first aid provision, and how to report an incident or near miss.

New starters and visitors should also be told who is in charge on site, how supervision works, any restricted or prohibited areas, and welfare facilities. The level of detail should be proportionate to the risks and the person’s role, but it must be clear, understandable, and confirmed before access to the site is allowed.

Under CDM 2015 and the Workplace (Health, Safety and Welfare) Regulations 1992, construction sites must provide suitable and sufficient welfare facilities from the start of work and keep them available throughout the project.

As a minimum, sites must have sanitary conveniences (toilets) that are adequate, accessible, and kept clean; washing facilities with hot and cold (or warm) running water, soap, and means of drying; drinking water that is wholesome and readily accessible; facilities for rest and for eating meals, including the ability to boil water and heat food; and changing facilities where workers need to change clothing or wear special workwear.

Facilities must be proportionate to the number of workers, segregated by sex where necessary, suitable for the work being carried out, and maintained in a hygienic condition. For most projects, portable toilets alone are not sufficient unless the work is short in duration and low risk.

Mental health and wellbeing on a construction site should be supported through a combination of leadership commitment, practical controls, and everyday behaviours.

Managers should set clear expectations that mental health is taken seriously, promote open conversations, and challenge stigma so people feel safe to speak up.

Support should be built into site arrangements, including reasonable working hours, managed workloads, adequate breaks, and welfare facilities that meet workers’ needs.

Access to information, training, and signposting to support services such as employee assistance programmes or industry helplines is also important.

Regular communication, visible supervision, and early intervention when concerns are noticed help prevent issues escalating. Where possible, involving workers in decisions that affect their work and wellbeing strengthens trust and resilience across the site.

A firm manages and monitors hand–arm vibration syndrome (HAVS) through risk assessment, exposure control, health surveillance, and review.

Vibration risks must be assessed by identifying vibrating tools, estimating daily exposure (A(8)), and comparing it with the Exposure Action Value (2.5 m/s²) and Exposure Limit Value (5.0 m/s²). Controls should then be applied to reduce exposure, such as using low-vibration tools, maintaining equipment, limiting trigger time, rotating tasks, and training workers in correct use and symptom awareness.

Where workers are at risk, health surveillance is required, including regular checks for symptoms and prompt action if HAVS is suspected. Records of assessments, controls, training, and surveillance must be kept and reviewed to ensure risks remain controlled and legal duties are met.

A Permit to Work is a formal written system used to control high-risk construction activities by clearly setting out what work is allowed, where, when, and under what safety conditions.

It becomes mandatory where the risk cannot be adequately controlled by normal procedures alone. In construction, this commonly includes confined space entry, hot works, work on live electrical systems, certain lifting operations, and work in high-risk areas such as near services or hazardous substances.

The permit confirms that hazards have been identified, control measures are in place, responsibilities are defined, and the work is authorised for a specific time and task. It must be issued before work starts, monitored while work is ongoing, and closed when the task is complete.

A Dynamic Risk Assessment is the ongoing, real-time assessment of risk carried out while work is in progress, to identify and respond to changing conditions or new hazards.

A formal risk assessment is completed before work starts and documents the known hazards, risks, and control measures for planned activities.

The key difference is timing and purpose: formal risk assessments plan safe work in advance, while dynamic risk assessments adapt controls on the spot as conditions change. Dynamic assessment complements formal assessment by ensuring work remains safe when circumstances differ from what was originally planned.

Maintaining structural stability during demolition or refurbishment requires careful planning and control under CDM 2015 and supporting HSE guidance.

Before work starts, a structural survey must be carried out by a competent person to understand load paths, temporary conditions, and the risk of collapse. A written method statement must then set out the safe sequence of work, including how floors, walls, beams, and columns will be supported as elements are altered or removed.

Temporary works, such as propping, bracing, or shoring, must be properly designed, installed, and inspected. Load-bearing elements must never be removed without adequate support in place, and changes to the structure must be managed in the planned order. Exclusion zones should be used where there is a risk of collapse, and the structure must be monitored throughout the work for signs of movement or instability.

Only competent contractors should carry out structural demolition or alteration, and the plan must be reviewed and updated if conditions change. Work must stop immediately if unexpected instability is identified.

Plant and vehicle segregation on a busy site should be managed through planning, physical controls, and clear communication.

Traffic routes must be designed to separate vehicles and pedestrians wherever possible, using barriers, fencing, marked walkways, and controlled crossing points. One-way systems, designated loading and unloading areas, and restricted access zones reduce conflict between moving plant and people.

Clear signage, site rules, and speed limits should be in place and enforced. Banksmen or traffic marshals should be used for reversing or complex movements, and all operators must be trained and authorised for the plant they use. Good lighting, visibility aids, and regular monitoring of traffic arrangements are essential, with layouts reviewed whenever site conditions or activities change.

Fire safety during the construction phase must be planned, implemented, and actively managed under CDM 2015 and fire safety guidance.

A site-specific fire risk assessment must be carried out and kept under review, identifying ignition sources, combustible materials, and people at risk. Fire prevention measures should be in place, including control of hot works, safe storage of flammable materials, good housekeeping, and suitable electrical controls.

The site must have clear emergency arrangements, including alarms, escape routes, emergency lighting where needed, signed assembly points, and adequate fire-fighting equipment appropriate to the risks. These arrangements must be explained to workers through inductions and briefings.

Where a building is partially completed, temporary fire precautions such as compartmentation, fire separation, and protected escape routes must be maintained. Fire safety responsibilities should be clearly allocated, inspections carried out regularly, and controls updated as the site layout and risks change.

On a multi-contractor construction site, the Principal Contractor is responsible for coordinating and ensuring adequate first aid provision for everyone on site.

Each employer and contractor still has a duty to provide first aid for their own workers, but the Principal Contractor must make sure arrangements are suitable, sufficient, and coordinated, so there are no gaps or duplication. This includes ensuring there are enough trained first aiders, appropriate equipment and facilities, and clear arrangements for emergencies.

Individual contractors have duties to their own staff, but the Principal Contractor has overall responsibility for first aid provision across the site.