Construction site accident claims in the UK.

Who counts as a "construction worker" in law?

Under the Construction (Design and Management) Regulations 2015 ("CDM 2015"), the definition is much wider than people assume. It covers anyone working on a construction project — whether you're directly employed, on a CIS card as a sub-contractor, supplied through an agency, or genuinely self-employed. The principal contractor owes you a duty of care for the duration you are on their site.

That matters because your employer might be a small labour-supply firm with no real assets — but the principal contractor will have £10m+ in employer's liability and public liability cover. The right defendant is whoever controlled the unsafe condition.

The five most-claimed construction injuries

1. Falls from height — scaffolding, ladders, MEWPs, fragile roofs. Single largest cause of fatal and serious injuries on UK sites.
2. Struck by falling object — dropped tools, swinging loads, collapsed materials.
3. Plant and vehicle injuries — excavators, dumpers, telehandlers, reversing lorries.
4. Trench, excavation and collapse incidents — usually a Construction Regs 22 breach.
5. HAVS, noise-induced hearing loss and silica disease — long-tail industrial disease claims with their own time limits.

What the regulations actually say

The most-cited regulations in UK construction accident claims are:

• CDM Regulations 2015 — overall duties on the client, principal designer and principal contractor.
• Work at Height Regulations 2005 — duty to avoid working at height where reasonably practicable; if not, to use collective protection (scaffolds, MEWPs, nets) before personal protection (harnesses).
• Provision and Use of Work Equipment Regulations 1998 ("PUWER") — equipment must be suitable, maintained, inspected and operated by competent people.
• Lifting Operations and Lifting Equipment Regulations 1998 ("LOLER") — six-monthly thorough examinations on lifting accessories.
• Manual Handling Operations Regulations 1992 — assess and reduce manual handling risk so far as reasonably practicable.

Realistic payout ranges

Compensation is split into two parts: general damages for pain, suffering and loss of amenity (set by reference to the Judicial College Guidelines, 17th edition) and special damagesfor actual financial losses (lost earnings past and future, medical treatment, care, equipment).

Special damages typically add 50–300% on top, depending on time off work and care needs.

What to do if you've had a construction accident this week

1. Make sure it's logged in the site's accident book and (if reportable) under RIDDOR.
2. Photograph the scene before it's tidied. Take wide shots and close-ups.
3. See your GP or A&E today — even if you feel "fine" beyond bruising. Adrenaline masks injuries.
4. Get the personal mobile numbers of two witnesses. People move sites fast.
5. Don't sign anything from the contractor's insurer or speak to them on a recorded line until you've taken free legal advice.

FAQs

Can a sub-contractor claim against the principal contractor?

Yes. Under CDM Regulations 2015, the principal contractor owes a duty of care to everyone on site — including labour-only sub-contractors and self-employed tradespeople. The right defendant is whoever controlled the unsafe condition, not necessarily who pays your wages.

What if I wasn't wearing my hard hat?

You can still claim. Contributory negligence may reduce your payout (typically 10–25%) but does not bar the claim. The court asks whether the employer's failure was the substantial cause.

Are scaffold collapses always the employer's fault?

Almost always. Under the Work at Height Regulations 2005 and Construction (Design & Management) Regulations 2015, scaffolding must be inspected by a competent person at least every seven days and after any event likely to have affected its stability.

Related reading: how the claims process works, electrical accident claims, struck by a falling object, UK time limits, no-win-no-fee explained.