The Work at Height Regulations 2005 apply wherever a person could fall from one level to another by a distance liable to cause personal injury. There is no general 2-metre threshold. A worker beside a floor opening, standing on a low platform or working next to an excavation can therefore be working at height even when both feet remain close to ground level.
For UK construction sites, the practical requirement is not simply to issue harnesses or produce a risk assessment. Work at height must be properly planned, appropriately supervised and carried out by competent people, following a hierarchy that first seeks to avoid the work at height, then prevent a fall and only then minimise the distance and consequences if a fall remains possible. Health and Safety Executive guidance reflects the requirements established by the Work at Height Regulations 2005.
Scaffolding at the 171 Victoria Street project in London, illustrating the work-at-height controls encountered on major UK construction sites. Image: London Construction Magazine.
What Counts as Work at Height?
Regulation 2 defines work at height broadly. It includes work above ground or floor level, but also circumstances where somebody could fall through an opening or fragile surface, or from ground level into an excavation or hole. Access to and egress from such a workplace can also fall within the definition, although using a staircase in a permanent workplace is excluded. This is why the familiar construction-site claim that the Regulations only begin at two metres is wrong. The legal test is whether a person could fall a distance liable to cause personal injury, not whether the potential fall exceeds a particular numerical height.
That can include a tradesperson working from a low stepladder or platform, somebody working beside an unprotected service opening, an operative on the bed of a delivery vehicle or a groundworker beside an excavation. The required precautions remain proportionate to the actual risk; the absence of a two-metre trigger does not mean every low-level activity requires the same controls as roof or structural steelwork.
Avoid, Prevent, Minimise: The Work at Height Hierarchy
Regulation 6 establishes the central hierarchy. Where reasonably practicable, work at height should first be avoided. On a construction project this could mean assembling components at ground level before lifting them into position, using extendable equipment or changing the construction sequence so that an activity can be completed from a safe level. Where work at height cannot reasonably be avoided, the next objective is to prevent a fall. Suitable existing workplaces, properly protected working platforms, scaffolding, temporary edge protection, tower scaffolds and appropriate MEWPs can provide collective protection without depending primarily on an individual worker reacting correctly at the edge.
Only where the risk cannot be eliminated should the system move towards minimising the distance and consequences of a fall. Safety nets, suitable soft-landing arrangements and personal fall-arrest systems can fall within this part of the hierarchy. The Regulations also require collective protection to be considered before personal protection. This distinction matters on live sites. Providing a harness does not automatically make an exposed edge acceptable. A fall-arrest system depends on suitable anchorage, compatible equipment, adequate clearance, correct use and an effective rescue arrangement. Where scaffolds, edge protection, working platforms or other engineered systems form part of the solution, they may also require control through the project's temporary works arrangements. London Construction Magazine's guide to what is considered temporary works in construction explains the wider site-control principles.
Ladders Are Not Banned on Construction Sites
Another persistent misconception is that HSE has banned ladders. It has not. HSE explicitly states that ladders and stepladders can be a sensible and practical option where other work equipment is not justified because the work is low risk and short duration, or because existing site features cannot be altered. HSE describes short-duration ladder work as no more than around 30 minutes at a time. That should not be misrepresented as a separate statutory offence beginning at minute 31; it is HSE guidance for determining whether a ladder remains an appropriate choice of equipment.
The task still matters. Heavy work, significant sideways loading, overreaching or an inability to maintain a stable working position may make another access method more appropriate even where the task itself is brief. Ladders must also be positioned and secured against movement as required by the Regulations. HSE also corrects another common misunderstanding about three points of contact. During brief work from a stepladder, this does not necessarily mean two feet and one hand at every instant. Where both hands are temporarily required, two feet together with the worker's body supported by the stepladder can provide the third point of contact, provided a handhold is available before and after the task.
Scaffolds, Working Platforms and the Seven-Day Rule
Inspection requirements are another area where different Work at Height duties are frequently merged together. Equipment exposed to conditions that could cause deterioration must be inspected at suitable intervals and after exceptional circumstances liable to jeopardise its safety. Installed or assembled equipment also requires inspection in the circumstances specified by Regulation 12.
There is, however, an important distinction concerning construction working platforms. HSE's Health and Safety in Construction guidance explains that where a construction working platform is 2 metres or more above a lower level, the statutory inspection regime includes inspection after installation or assembly and at intervals not exceeding seven days. Where the relevant inspection-report requirements apply, the competent person must complete the report before the end of the working period and provide it to the person for whom the inspection was carried out within 24 hours.
This creates an important legal distinction: two metres is not the threshold for work at height, but it remains relevant to particular working-platform inspection provisions.
A scaffold or platform may also need reinspection after alteration, impact or weather capable of affecting its safety. Adding sheeting, moving ties, altering loading arrangements or modifying access can change the conditions assumed by the original temporary works arrangement. The wider engineering implications are examined in London Construction Magazine's analysis of temporary works alterations and stability risk.
Weather, Fragile Surfaces, Openings and Falling Objects
Regulation 4 requires weather conditions to be considered where they could jeopardise health or safety. The Regulations do not prescribe one universal wind-speed limit for every scaffold, MEWP, roof operation or temporary structure. Limits can instead depend on equipment manufacturers' requirements, the work activity, structural design, exposure and site-specific conditions. This becomes particularly important when temporary structures are modified. Sheeting or debris netting, for example, can materially change wind loading and may require engineering assessment rather than a generic site wind-speed rule. London Construction Magazine has separately examined wind loading in temporary works.
Fragile surfaces require specific consideration under Regulation 9. Work on or near them should be avoided where reasonably practicable; where it cannot be avoided, suitable measures are required to prevent a person falling through or, where that cannot be achieved, to minimise the distance and consequences. Warning notices are also required at approaches where appropriate. Floor openings, lift shafts, rooflights, risers and exposed edges need controls capable of dealing with the actual foreseeable risk. Likewise, Regulation 10 requires suitable and sufficient steps to prevent objects falling where reasonably practicable and, where that cannot be achieved, measures to prevent people being injured by falling material or objects.
Work at Height Rescue Must Be Planned Before Work Starts
A fall-arrest system solves only the first part of the emergency. Regulation 4 specifically requires planning for emergencies and rescue as part of planning work at height. For construction work, HSE is particularly clear that arrangements should not rely on the fire brigade, because a delay may be critical. The appropriate rescue method depends on the activity and equipment involved. A MEWP operation, roof activity, scaffold operation and worker suspended from a personal fall-arrest system may therefore require very different arrangements.
The plan needs to work in the real site environment: suitable equipment must be available, those expected to use it must be competent, access to the casualty must be achievable and the rescue should not expose additional people to an uncontrolled fall risk. HSE's construction work-at-height guidance confirms the requirement to plan for rescue rather than simply assuming emergency services will resolve the situation.
Who Is Responsible for Work at Height?
WAHR duties apply to employers and those who control work at height to the extent of their control. On construction projects these duties operate alongside the Construction (Design and Management) Regulations 2015, rather than replacing them.
Clients must make suitable arrangements for managing projects. Designers and principal designers should consider whether foreseeable work-at-height risks can be eliminated or reduced through design. Principal contractors plan, manage, monitor and coordinate the construction phase, while individual contractors and employers retain responsibilities for the work and workers under their control. Workers themselves must use equipment in accordance with training and instructions and report safety defects.
Competence is equally important. Regulation 5 requires people involved in organising, planning, supervising or carrying out work at height to be competent, or, where being trained, to work under the supervision of a competent person. The legislation does not make possession of a particular commercial training card the universal legal definition of competence.
Why Falls From Height Remain a Construction Priority
The continuing enforcement record shows why these apparently familiar rules still matter. HSE's provisional figures for 2025/26 recorded 31 worker deaths from falls from height across Great Britain, making falls the most common kind of fatal workplace accident. Construction recorded 25 worker fatalities from all causes, the highest number among the main industry sectors. The longer-term construction picture is equally important. HSE's 2025 construction statistics found that falls from height represented 53% of construction worker fatalities by accident type when averaged across 2020/21 to 2024/25.
Recent prosecutions demonstrate that the failures are often straightforward rather than technically obscure. In August 2026, Lowndes Lumb Construction Limited was fined £60,000 after a worker fell through an unprotected rooflight during refurbishment work in Fulham. HSE found that suitable measures such as scaffolding, guardrails, an internal crash deck or an appropriate harness system had not been used. The company pleaded guilty to breaching Regulation 6(3). The lesson for construction sites is therefore broader than knowing the Regulations. The approved method, access equipment, temporary works and physical protection must still exist and remain effective at the moment the worker reaches the workface. A risk assessment cannot replace a missing guardrail, and a harness cannot compensate automatically for a fall risk that could reasonably have been prevented collectively.
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Expert Verification & Authorship: Mihai Chelmus Founder & Editor, London Construction Magazine | Construction Testing & Investigation Specialist |