What is a construction accident claim?
A construction accident claim is a civil claim for personal injury compensation arising from an accident on a construction site, a scaffolded building exterior, a demolition project, or a civil engineering or infrastructure site. The claim is founded on the negligence of a person or organisation who owed the injured worker a duty of care and failed to discharge it.
Construction sites involve a range of duty-holders: the principal contractor who manages and controls the site, individual sub-contractors who employ the workers on their trade, the designer who may have specified unsafe working methods, and the client who commissioned the project. Under the Construction (Design and Management) Regulations 2015 (CDM 2015), each of these parties has defined duties. A construction accident claim can be brought against any one or more of them, depending on whose failure caused the accident.
For workers employed by a specialist subcontractor who is injured by a condition of the site as a whole (a missing handrail, an unguarded edge, a poorly secured scaffold), the construction accident claim is typically brought against both the direct employer and the principal contractor. Courts have consistently held that principal contractors cannot avoid liability for site-wide safety failures by pointing to the individual subcontractors.
Common causes of construction site accidents
The categories of accident that most frequently give rise to a construction accident claim are:
Falls from height. Falls from scaffolding, ladders, roof edges, floor openings, and excavation edges. The height regulations (Work at Height Regulations 2005) require that all work at height is properly planned, supervised, and carried out using the most appropriate means. The hierarchy requires: avoiding working at height where possible; using collective fall prevention (scaffold, platforms, edge protection); and only then using fall arrest equipment (harnesses, nets). A ladder is not an appropriate means of access for prolonged or heavy work.
Scaffold collapses and defects. Scaffold erected without base plates, without adequate ties to the building, or without proper loading calculations creates a foreseeable risk of partial or total collapse. Scaffolding must be erected and dismantled by trained scaffolders and inspected regularly by a competent person: before first use, after modification, and at intervals not exceeding seven days during use.
Struck by objects. Workers struck by materials falling from height (improperly secured bricks, tools, or debris from above), by swinging crane loads, or by reversing plant and vehicles. Exclusion zones, toe boards on scaffolds, and banksmen controlling crane lifts are standard controls.
Plant and machinery accidents. Excavators, dumpers, mobile elevated work platforms (MEWPs), and piling rigs. Accidents occur when workers are struck by plant reversing or turning, when MEWPs tip or contact overhead lines, and when unguarded plant components cause contact injuries.
Excavation collapses. Trench excavations that are not adequately supported or battered back create a risk of collapse that can trap and suffocate workers. The risk is often underestimated because the collapse may be instantaneous.
Manual handling on site. Back injuries from lifting concrete blocks, scaffold boards, and heavy building materials without mechanical assistance. The Manual Handling Operations Regulations 1992 apply on site as much as in any other workplace.
Who can bring a construction accident claim?
A construction accident claim can be brought by:
Directly employed site workers. A worker employed by the principal contractor or a subcontractor who is injured through a failure of their own employer's systems of work, training, or site management.
Self-employed subcontractors. A self-employed bricklayer, electrician, or plumber working on a site controlled by a principal contractor is not prevented from bringing a construction accident claim if the accident was caused by the site conditions or the principal contractor's system of work. Section 3 of the Health and Safety at Work etc. Act 1974 requires every employer to conduct their undertaking in such a way that persons not in their employment who may be affected are not exposed to risks. A principal contractor who allows a dangerous site condition to persist has breached that duty to self-employed workers on the site.
Agency workers and labour-only subcontractors. Workers supplied through an agency have the same right to bring a construction accident claim as directly employed workers. Liability may fall on the agency (as employer) and on the principal contractor (as the person in control of the site), depending on who controlled the relevant work.
For a full guide to self-employed workers' rights to claim, see our how claims work guide.
How is a construction accident claim valued?
Compensation in a construction accident claim consists of general damages and special damages. General damages are assessed by reference to the Judicial College Guidelines (17th edition, April 2024):
Spinal injuries from falls and collapses:
- Severe spinal cord injury with neurological deficit: £148,330 to £197,790
- Severe back injury with nerve root involvement and residual disability: £38,780 to £69,330
- Moderate back injury with significant but not permanent symptoms: £12,510 to £38,780
Head and brain injuries from falls and struck-by incidents:
- Very severe brain damage requiring full-time care: £344,150 to £493,000
- Moderate brain damage with lasting cognitive effects: £43,060 to £219,070
- Minor head injury with recovery within weeks: £2,690 to £12,770
Leg injuries from falls from height and plant accidents:
- Amputation of one leg above the knee: £127,930 to £183,520
- Severe leg fracture with complications: £17,960 to £54,830
- Moderate knee injury: £14,840 to £26,190
Shoulder injuries from falls and manual handling:
- Severe shoulder injury with significant functional restriction: £19,200 to £48,030
Construction accident cases frequently involve catastrophic injuries where special damages are the largest component of the overall award. A fall from scaffolding that results in a spinal cord injury to a worker in their 30s can generate future care costs and lost earnings of several hundred thousand pounds, far exceeding the general damages figure.
What evidence supports a construction accident claim?
A construction accident claim requires evidence in three areas:
Incident records. The accident book entry, the RIDDOR report, and any site incident investigation report. On a large multi-employer site, the principal contractor typically produces a formal incident investigation report. That report, however critical of the injured worker's actions, is a contemporaneous document that is disclosed in civil proceedings and often supports the claimant's account of the mechanism of the accident.
Site records. The site-specific health and safety plan (required under CDM 2015), scaffold inspection records, risk assessments, method statements, equipment inspection logs, and toolbox talk records. Where these records are absent or inadequate, that absence itself is evidence that the principal contractor's safety management was deficient.
Physical and photographic evidence. Photographs of the defective scaffold, the unguarded edge, or the fall zone taken immediately after the accident, before any remedial work is carried out. Site conditions on construction projects change rapidly; photographs taken within 24 to 48 hours of the accident can be decisive.
For a guide to what employers and principal contractors must do after a construction accident, including their evidence preservation duties, see our employer responsibility guide.
Time limits for a construction accident claim
The three-year limitation period under section 11 of the Limitation Act 1980 applies to construction accident claims. The clock starts from the date of the accident. Where a condition such as a respiratory disease or industrial hearing loss develops from work on construction sites over time, the three-year period runs from the date of knowledge: when the worker first knew the condition was work-related.
For workers who were injured while under 18, the three-year period runs from their 18th birthday.
Most construction accident claims are funded on a Conditional Fee Agreement. The success fee is capped at 25% of general damages and past financial losses. Future care and future lost earnings awards are excluded from the cap. For a guide to how no-win-no-fee funding operates, see our no-win-no-fee page. For a full guide to the health and safety legislation that underpins a construction accident claim, see our workplace injury laws page.
This guide is for general information only and does not constitute legal advice. Construction accident claims involve complex questions of liability across multiple parties, specialist safety evidence, and limitation period issues that depend on individual facts. For advice about your situation, speak to a regulated solicitor. You can find one through the Find a Solicitor service (Law Society) or through APIL.
Frequently asked questions
Who is responsible for safety on a construction site — the main contractor or the individual employer?
Both can be liable. The Construction (Design and Management) Regulations 2015 place duties on the principal contractor (site-wide safety management) as well as on individual employers (their own employees' safety). If your injury was caused by a site-wide failing — inadequate edge protection, poor welfare facilities, unsafe access — the principal contractor may also bear liability alongside your own employer.
Can I claim if I was a self-employed subcontractor on a construction site?
Yes. Self-employed subcontractors are owed duties by the principal contractor and, in some cases, the client. The Occupiers' Liability Act 1957, the CDM Regulations 2015, and the Work at Height Regulations 2005 all create duties that apply to all lawful workers on site, not just direct employees.
What are the most common causes of construction site injury claims?
Falls from height (scaffolding, ladders, roofs, excavations) are the leading cause of fatal and serious injuries. Manual handling injuries, struck-by incidents (falling objects, plant movements), slips and trips on uneven ground or debris, and hand/arm injuries from power tools are also consistently high in the HSE statistics.
How much can I claim for a serious construction site injury?
Serious construction injuries — spinal injuries, traumatic brain injury, amputation, multiple fractures — attract general damages at the higher end of Judicial College Guidelines ranges (£100,000 to £350,000+ for the most serious). Special damages for future care, accommodation adaptation, and lost lifetime earnings in a serious case can run to millions. A senior personal injury solicitor should be instructed for high-value claims.
Browse every plain-English guide in the work accident guides hub, or read the main guide to how a claim works.
This guide is for general information only and does not constitute legal advice. Every claim turns on its own facts. For advice about your specific situation, speak to a regulated solicitor.