Business · 9 min read

Scaffolding insurance UK: what cover you need and what it costs

No insurance, no site. Most main contractors, housing associations and even careful homeowners will ask to see your certificates before a scaffold goes up, and the limits they expect have crept upward over the last few years. This guide covers the policies a UK scaffolding firm actually needs, typical limits, what drives the cost up or down, and what buyers will demand before they let you on site.

The core policies

Employers' liability insurance

This one is not optional. If you employ anyone, including labour-only subcontractors working under your direction. You are legally required to hold employers' liability insurance with a minimum limit of £5 million, and you must display the certificate where staff can see it (or provide it digitally). Given scaffolding's injury profile, £10 million is now the market standard rather than the exception, and most insurers will offer it at only a modest premium above £5 million.

Public liability insurance

Public liability covers injury to a passer-by hit by a falling pole, or damage to a client's property, a neighbour's car, or underground services struck while setting base plates. £1 million used to be the floor; most scaffolding firms now carry £2–5 million, and main contractors on larger commercial and public sector work frequently specify £10 million in the subcontract order. Check the contract before you price the job, an unexpected insurance requirement can mean a mid-term policy upgrade at extra cost.

Contract works and plant/tools cover

Contract works insurance protects the scaffold structure itself, for example if it is damaged by a storm, a vehicle collision, or a fire before it comes down. Plant and tools cover is a separate policy (or extension) for hand tools, power tools and small kit that goes missing from vans and yards, which is one of the most common claims a scaffolding firm makes. Insure at replacement value and review the sum insured annually as you buy more kit.

Professional indemnity insurance

If you produce your own designs, bespoke calculations, or method statements that a client or main contractor relies on without independent check, professional indemnity cover protects you if that advice turns out to be wrong. Firms that only erect to standard TG20:21 configurations often skip this; firms doing regular bespoke design work should carry it. See our guide to when scaffold design is required for where that line sits.

What drives the cost of scaffolding insurance

• Turnover and headcount. Premiums are usually rated per £1,000 of turnover or per employee.
• Claims history. A clean five-year record can cut premiums significantly versus a firm with recent claims.
• Type of work. Domestic and low-rise commercial rates lower than high-rise, temporary roofs or industrial/petrochemical work.
• Height and complexity of typical jobs. Regular work above set height thresholds attracts higher premiums.
• Accreditations. NASC membership and SSIP schemes (CHAS, SafeContractor, Constructionline) can reduce rates by demonstrating managed risk.
• Excess level. A higher voluntary excess lowers the annual premium but increases exposure per claim.

As a rough guide for 2026, a small one-to-two-van scaffolding firm doing mixed domestic and light commercial work typically pays £2,000–£4,500 a year for a combined package of employers' and public liability, contract works and plant cover. A larger firm running several gangs on commercial and industrial contracts, with higher limits and a bigger kit value, can see combined premiums well into five figures. These are indicative ranges only. Get quotes from at least two or three insurers who understand scaffolding specifically, not a generic tradesman policy.

What contractors and buyers demand

Before you are added to an approved subcontractor list or awarded a framework place, a buyer will typically ask for current certificates showing:

• Employers' liability, usually £10 million specified in the subcontract order.
• Public liability. Commonly £5–10 million on commercial and public sector work.
• Confirmation the policy names "scaffolding erection and dismantling" explicitly, not just "construction activities".
• An expiry date at least covering the full contract duration.

Keep digital copies ready to send the moment a buyer asks, our guide to getting scaffolding contracts covers the wider document pack you will need alongside insurance.

Worked example: pricing insurance into a job

A firm with £180,000 annual turnover pays £3,600 a year in combined insurance premiums, roughly 2% of turnover. Spread across an estimated 400 chargeable scaffold-weeks a year, that works out at £9 per scaffold-week, which should sit inside your overhead recovery rather than being forgotten. Our overheads per gang day guide shows how to fold costs like this into your day rate.

Common questions

Is public liability insurance a legal requirement?

Not by law, unlike employers' liability, but in practice almost no client, main contractor or local authority will let you on site without it, so it is effectively compulsory to trade.

Does my policy need to name scaffolding specifically?

Yes. A generic construction or tradesman policy may exclude scaffold erection at height, or apply a lower sub-limit. Always confirm scaffolding erection and dismantling is named as a covered activity.

Do I need separate cover for hired-in kit?

Usually yes, or an extension to your existing policy, hire companies will often require proof you are insured for the replacement value of any kit on hire from them.