Keeping your home warm and your gas appliances safe isn’t just a good idea – it’s the law. If you’re a homeowner or landlord in the UK, you’ve likely heard about the importance of an annual boiler service and holding a valid Gas Safety Certificate. But how much should all of this actually cost? And what exactly are you paying for?
We’ve broken it down simply below, with no jargon – just clear info you can use.
What Is a Boiler Service?
A boiler service is a routine check carried out by a Gas Safe registered engineer to make sure your boiler is working safely and efficiently. It’s recommended once a year, and in many cases, it’s required to keep your manufacturer’s warranty valid.
During a standard service, the engineer will:
- Check for gas leaks
- Inspect the flue and ventilation
- Test the pressure and controls
- Clean parts if needed
- Highlight any signs of wear or damage
Regular servicing not only helps avoid costly breakdowns but can also keep your energy bills lower by improving efficiency.
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What Is a Gas Safety Certificate?
A Gas Safety Certificate (also called a CP12 certificate) is a legal requirement for landlords across the UK. It confirms that all gas appliances in a rented property – such as the boiler, cooker, and gas fire – have been checked and are safe to use.
Landlords must:
- Have a gas safety check carried out annually
- Keep a copy of the certificate for at least two years
- Give tenants a copy within 28 days of the inspection
If you’re a homeowner, you’re not legally required to have one – but it’s still wise to get your gas appliances checked yearly as part of a boiler service.
How Much Does a Boiler Service and Gas Safety Certificate Cost in the UK?
Prices can vary depending on where you live, the type of boiler, and whether you’re combining services. But here’s a general idea:
Boiler service only: £120 to £250
Gas Safety Certificate only (CP12): £85 to £250
Combined service and certificate: from around £120 to £350
Booking both together often works out cheaper than having them done separately. Some local engineers and companies also offer fixed-price packages, which can be handy for budgeting.

Factors That Can Affect the Cost
A few things can push the price up or down:
- Your location: Prices tend to be higher in London and the South East.
- The number of appliances: If you need multiple gas checks, it’ll cost more.
- Boiler type and condition: Older or less common boilers may take more time to service.
- Urgency: Same-day or out-of-hours visits might come with an extra fee.
Is It Worth It?
Absolutely. Whether you’re a homeowner trying to avoid boiler issues or a landlord staying on the right side of the law, regular servicing is worth every penny. It can save you hundreds in repair bills, keep your tenants safe, and give you peace of mind – especially in winter.
Finding a Gas Safe Registered Engineer Near You
Always make sure the person carrying out the check is Gas Safe registered. You can ask to see their ID card, or check their registration online at GasSafeRegister.co.uk.
Many local engineers across the UK offer competitive rates for boiler servicing and safety checks, and some will even give you a discount for booking early or combining services.
The Bottom Line
In short, the boiler service and gas safety certificate cost in the UK doesn’t have to break the bank – especially if you combine both jobs in one visit. And more importantly, keeping on top of these checks helps protect your home, your wallet, and your loved ones.
Need help finding a local Gas Safe engineer or want a quick quote? Just get in touch – we’re here to help.
FAQs
Most homeowners and landlords can expect to pay between £100 and £150 when booking a combined service. Prices can vary depending on location, but booking both together often saves money compared to separate appointments.
Prices often depend on where you live. For example, boiler services in London and the South East tend to cost more than in the Midlands or North due to higher overheads. Local demand and competition also play a part.
Yes – many local engineers and heating companies across the UK offer fixed-price packages for both gas safety checks and boiler servicing. These can be especially helpful for landlords with multiple properties.
No, homeowners in the UK are not legally required to have a Gas Safety Certificate. However, an annual boiler service is strongly recommended for safety and efficiency. The certificate is a legal requirement for landlords only.
In most cases, yes. Many engineers offer discounted rates when both are booked at the same time. This is especially useful for landlords needing both the service and the CP12 for compliance.
Look for someone who is Gas Safe registered. You can search your local area through the Gas Safe Register website. Always check ID before the work begins to ensure they’re properly certified.
In London, the average cost for a Gas Safety Certificate ranges from £85 to £120, though this can increase with the number of appliances checked or if it’s combined with a boiler service.
You should receive either a paper or digital CP12 certificate after the inspection. Landlords must give tenants a copy within 28 days and keep records for at least two years.
Further Reading
What is the validity of a commercial gas certificate for businesses?
Is a gas certificate compulsory for a commercial property?
Everything you need to know about getting an LPG certificate in London
Boiler Service Near Me: Essential guide to boiler maintenance
Does a commercial property need a gas safety certificate?
What you need to know about catering commercial gas certificate that covers catering
Where can I get my LPG gas conversion certificate?
How much does an LPG certificate cost?
Commercial gas safety certificate
What you need to know about commercial gas safety certificate cost?
What certificate does a commercial landlord require for gas?
Commercial catering gas safety certificate law: What you need to know
How to Get the LPG Engineer – One That Issues LPG Gas Safety Certificates
Who is responsible for gas certificates in commercial properties?