27 June 2025
Your guide to public liability insurance for building contractors
6 minutes
The construction industry is a particularly hazardous line of work; the inherent dangers of operating heavy machinery, navigating unstable surfaces, and exposure to harmful substances at building sites mean contractors are constantly exposed to potential accidents.
That’s why public liability insurance is a crucial safeguard for both self-employed contractors and larger building companies alike. It provides essential protection against third party claims for injuries or property damage caused by business activities.
This guide will walk you through everything you need to know about public liability insurance for building contractors, including what it covers, why it’s essential, and how to find the right insurance policy for your business. Let’s get started!
Are you looking for builders' insurance to protect your business? Get in touch with us! Our team of experts can help you find tailored cover to suit your business needs.
Do you need public liability insurance as a building contractor?
Public liability insurance is particularly vital for tradespeople, as they face higher risks associated with injuries or damages caused during their work (increasing potential liability claims). While public liability cover isn't a legal requirement for businesses in the UK, it is highly recommended for all building contractors, given their frequent interaction with clients and the public, whether on their premises or elsewhere.
It's also worth noting that it's an industry standard for clients to require public liability cover from contractors before building work can start. So, while it may not be required legally, it's usually required contractually.
Let's take a look at some scenarios where builders could be held liable:
-
Accidental property damage: While demolishing an old wall, a section collapses onto the neighbouring property, accidentally damaging their fence, and garden shed. Public liability insurance would cover the repair or rebuilding costs for any property damage caused.
-
Accidental injury to a client: During an internal renovation of a commercial office building, a temporary access route becomes unexpectedly slippery due to tracked-in mud. A client visiting the building slips and falls, spraining their ankle. Public liability insurance would cover medical costs and potential compensation.
Find out more here: Is public liability insurance compulsory?
What does builders' public liability insurance cover?
Public liability cover protects contractors by covering legal fees and compensation costs if a claim is made against your business involving injury or death caused by your business activities, as well as damage to third-party property. This includes:
-
Accidental bodily injury
-
Accidental death
-
Accidental damage to property
-
Total loss of property
What does builders' public liability insurance not cover?
Public liability insurance won't cover every type of claim. Below are five common exclusions:
1. Employee injuries
If a contractor becomes ill or sustains an injury while working for your business, public liability insurance does not cover compensation claims or legal fees.
You'll need employers liability insurance for this, which is a legal requirement in the UK if you employ people, whether you're self-employed, a sole trader or own a limited company.
2. Your own property and equipment
Public liability insurance won't cover damage to your own building, equipment, or contents, even if the damage is caused by your business activities. Instead, you'll need to look into tools and equipment cover for the tools you use on the job, and business buildings and contents insurance to protect your own business premises.
3. Personal injury
If you become injured from your own business activities, you won't be covered under your public liability policy. Instead, you'll need separate personal accident insurance to cover this risk.
4. Professional negligence
Public liability insurance does not cover legal claims arising from errors in your professional advice, services, or poor workmanship that result in financial loss for a client. Professional indemnity insurance would cover this.
5. Criminal acts
Public liability insurance won't cover any damage or injuries that occur while you're breaking UK laws or committing a crime.
What insurance do I need as a building contractor?
Without a doubt, the first business insurance policy builders should secure is public liability insurance, to protect their business from the various claims that can arise. Builders might also want to consider several other key types of insurance to protect their business in the worst-case scenario.
Many insurance providers offer tailored builders' insurance policies (also known as contractors' insurance). These typically combine a range of individual cover types (almost always including public liability), into one policy specifically designed for building contractors.
Builders' insurance policies may include some or all of these cover options - if they aren't included, you can add them on as extras. Always check with your insurer first to see what's included.
Employers' liability insurance
Employers liability insurance is another essential for building contractors - protecting you financially should an employee make a claim against you for an incident that causes personal injury or property damage.
This type of insurance is legally required in the UK if you employ staff.
Contract works insurance
Also known as contractors' all risk insurance (CAR), this type of cover is essentially a ‘given’ in the industry, designed to protect builders and other tradesmen against loss or damage to ongoing construction works, materials, plant, and equipment on a construction site.
It essentially provides 'all-risks' coverage for the project itself, subject to specific exclusions.
Professional indemnity insurance
Even construction professionals can make errors of judgement. If, as part of your service, you offer business advice to a client, professional indemnity insurance covers compensation costs if your advice leads to financial loss or reputational damage for a client.
Note: Clients will almost always contractually require you to have these three insurance types in place before you can start any construction project.
Product liability cover
Product liability insurance protects you and your business from claims if a product you've provided (e.g., a boiler or kitchen unit) causes damage or injury after it's been installed or given to a client. While not legally required, some clients may insist you have it in place contractually.
Tools and equipment cover
Contractors are always using expensive tools on the job. Tools and equipment insurance covers the cost of repairing or replacing your trade tools and key equipment if they are lost, stolen, or damaged.
Legal expenses cover
Legal expenses insurance covers legal costs like solicitor fees and court expenses for business-related legal action taken against you.
Personal accident cover
Personal accident insurance is a must-have for builders and contractors, given the high chance of accidents. It protects you financially until you recover from any injury or illness that leaves you unable to work.
Hired-in plant insurance
Hired-in plant insurance provides cover for theft, damage or loss of hired plant machinery, such as drilling units or excavators.
Business van insurance
At the heart of any trading business is its van or business vehicle. You can protect yours with a business van insurance policy.
Commercial property insurance
Also known as business buildings insurance, it covers the cost of repairing or rebuilding your building business premises if they are damaged or destroyed by events like fire, flood, or storms. It typically covers the physical structure of the building and its permanent fixtures.
Business contents insurance
Also known as office equipment insurance, it covers the cost of repairing or replacing the fittings and fixtures (e.g. desks, furniture) of your business premises. This includes essential operational equipment (excluding tools), like computers, telephone systems and printers.
Business interruption insurance
Business interruption insurance covers lost income and additional expenses (like temporary relocation costs) if your building business is affected by an insured event such as a fire and cannot operate.
If you’re still not sure what insurance you need, read our guide: Do I need business insurance?
How much does public liability insurance cost for a builder?
There's no 'one size fits all' cost for builders' public liability insurance, and it depends on the insurance provider. However, generally, insurance premiums are calculated based on the following factors:
-
The types and level of cover you choose
-
The risks you face
-
The nature and size of construction projects you’re working on
-
The amount of excess you’re willing to pay
-
Whether you’ll pay in upfront or in monthly instalments
-
Your claims history
Ultimately, the best way to find out exactly how much your premiums will cost is to get a public liability insurance quote - which you can do with us at Howden today!
You'll also have the option to pay for your insurance policy via direct debit, if that's your preference.
Which other tradesmen and professionals should have public liability insurance?
Here's a list of other tradesmen, professionals and businesses that should consider public liability insurance:
Trades & construction:
- Bricklayers
- Builders
- Carpenters
- Contractors
- Electricians
- Gardeners
- Gas Engineers
- Groundworkers
- Handymen
- HVAC Engineers
- Mechanics
- Painters and Decorators
- Plumbers
- Roofers
- Scaffolders
- Shopfitters
- Steel Fabricators
- Subcontractors
- Tree Surgeons
- Welders
Services:
Specialist & commercial:
Business related:
Public liability insurance for building contractors: FAQs
Do I legally need public liability insurance?
No, public liability insurance is not a legal requirement in the UK, but it is almost always contractually required by clients to protect against third party claims for injury or property damage.
Find out more here: Is public liability insurance compulsory?
What happens if my builder doesn't have insurance?
If your builder doesn't have insurance and something goes wrong (e.g., property damage, third-party injury), you, as the client, could be left liable for the costs, or you might have to pursue the builder directly for compensation, which can be a lengthy and difficult legal process.
How much public liability insurance do I need?
The amount of public liability cover you need typically depends on the size and type of construction projects you undertake; clients often specify a minimum cover, which could range from £1 million, £2 million, or even £5 million or more for larger construction contracts.
Does a building contractor need professional indemnity insurance?
Yes, building contractors increasingly need professional indemnity insurance, especially if they offer any design, specification, or advisory services, as it covers claims for financial loss resulting from professional negligence or errors in their advice. It is often contractually required by clients.
What insurance do self employed builders need?
Self-employed builders typically need public liability insurance, tools and equipment cover, and potentially employers' liability if they hire anyone, even casually; professional indemnity cover is also important if they offer design or advice. These are viewed as the bare minimum. If your business is based from home, you should consider home workers insurance.
Find out more here: Public liability insurance for self-employed people: your essential guide
More about public liability insurance
Public liability insurance guides
Want to learn more about public liability insurance and how it works? Check out our other guides below:
- Public liability insurance for events: what you need to know
- Is public liability insurance compulsory?
- Public liability insurance for self-employed people: your essential guide
- Your guide to public liability insurance for gardeners
- Your guide to public liability insurance for roofers
- Your guide to public liability insurance for couriers
- What is Public Liability Insurance? (Full Guide)
- The Difference Between Employee & Public Liability Insurance
- How Much is Public Liability Insurance?
- Public Liability Insurance Certificate: All You Need to Know
- Why now is the time to take out Public Liability
- All you need to know about public and product liability insurance
- What Is Liability Insurance? A Complete Guide
More Resources
Articles about running a small business
Read any of the articles below to learn more about going self-employed, or starting and running your own small business:
Day-to-day running your business
- Running a business from home: Council rules in the UK
- Is your business ‘outstanding’?
- Turn business challenges into triumphs
- How does diversity help your business grow?
- Minimum wage rise - good or bad news for small businesses?
- What is the UK tax return deadline?
- New legislation impacting your business
- What is Employment Allowance UK?
- VAT return: all the information you need
- 21 of the smartest van storage ideas
- Do I need business insurance?
Starting your own business
- Business insurance brokers: what are they and how can they help?
- How to trade mark a name in the UK
- What’s on the HMRC starter checklist?
- Small Business Grants to Be Aware of in the UK
- How to Register a Name for a Business in the UK
- What to know about your business tax account (HMRC)
- Types of Business Insurance You Should Know About
- What business insurance do I need?
- How to Invoice as a Sole Trader: Your Step-by-Step Guide
- Sole Trader Advantages & Disadvantages
- What is a sole trader in the UK?
- How to register for VAT in the UK
Self-employed professionals
Latest guides on business terminology, documents and formulas
There are so many business documents, formulas and terminology that need to be considered when operating a business. Here are some guides on key aspects of business:
Business calculations & formulas
- Margin of safety: formula, and more
- How to Calculate Turnover for Your Company
- Gearing ratio: what to know for your business
- How to calculate VAT: A complete guide
- Working capital: formula, plus more
- Cost of sales formula: how to calculate CoS
- Cost of goods sold: formula and more
- How to value a business: step-by-step guide
Business jargon
- CapEx vs OpEx: What’s the difference?
- What is the domestic reverse charge?
- Per diem: meaning, examples, and more
- What is Turnover in Business? A Complete Guide
- What to Know About Return on Capital Employed (ROCE)
- What is PAYE? All the info you need
- What is Employment Allowance UK?
- Markup vs margin: what’s the difference?
- How much is a damp proof course?
- What is a holding company?
- What is Capital Expenditure in Business?
- What is a PO number?
- What is operating profit?
- Salary advance: key info for employers
- What is equity in business?
- Non-current assets: your guide to the key info
- What is a breach of confidentiality?
Business documents
Guides about business liability insurance
Making sure your business is covered with the right liability insurance is crucial – whether it be public liability, employers liability, professional indemnity insurance, or something more specific.
Read up on how different types of liability insurance work by reading any of the articles below:
- Public liability insurance for events: what you need to know
- Is public liability insurance compulsory?
- The Difference Between Employee & Public Liability Insurance
- What is Public Liability Insurance? (Full Guide)
- All you need to know about public and product liability insurance
- What’s the average employers’ liability insurance cost?
- How Much is Public Liability Insurance?
- Public Liability Insurance Certificate: All You Need to Know
- Why now is the time to take out Public Liability
- What is Employers’ Liability Insurance?
- What is Professional Indemnity Insurance? Your Complete Guide
- What is Errors and Omissions Insurance?
Other guides about specific small businesses
Interested to learn more about specific small businesses and professions? Find out more in any of latest business guides below:
- Insurance for takeaway businesses
- How to Start a Cleaning Business: 7 Steps to Take
- Run a vaping shop? Make sure your business is protected
- Built to last: insurance essentials for joinery businesses
- How to Become a Carpenter in the UK
- Mitigating flood risk for printing businesses
- Accounts payable: what you need to know