What's the difference between contract works insurance and public liability insurance?
Contract works insurance protects the building or structure you're constructing against loss or damage. Public liability insurance protects you if the works injure a third party or damage someone else's property. They cover entirely different risks and most contractors need both, usually bundled together inside a contractors all risk policy.
- Contract works cover is first-party — it protects your own project.
- Public liability is third-party — it protects other people and their property from your project.
- A CAR policy typically bundles both, plus plant cover, into one contract.
- Clients and contracts often specify a minimum public liability limit separately from the contract works sum insured.
- Having one without the other leaves a real, common gap on any active building site.
Two different questions, two different covers
Why most contractors buy both together
Where the limits come from
A scaffolding pole injures a pedestrian
Scenario: A dropped scaffolding pole on a town-centre renovation project struck and injured a passing pedestrian, who required hospital treatment and later brought a compensation claim.
Resolution & Judicial Outcome: The public liability section of the contractor's policy handled the pedestrian's medical costs and compensation claim, while the contract works section was untouched since the building itself suffered no damage from the incident.
What You Should Do: Step-by-Step Action Plan
Critical Mistakes to Avoid
- Assuming a high contract works sum insured means you also have adequate liability cover.
- Quoting a job without checking the client's minimum public liability requirement.
- Buying only public liability and skipping contract works cover on a higher-value build.
- Confusing employers' liability (covering your own staff) with public liability (covering third parties) — they are different covers again.