In 2026, a standard annual boiler service in the UK typically costs £80–£120, with the national average around £100. Across Leicestershire, expect roughly £80–£110 for a straightforward gas combi. Oil and system boilers sit a little higher. Below, we break down what’s included, the cost by boiler type, why it matters, and how often you actually need one.

What does a boiler service include?

A proper boiler service is far more than a quick glance. A Gas Safe registered engineer carries out a full inspection to confirm your boiler is running safely and efficiently, and to catch small faults before they become expensive breakdowns.

A thorough annual boiler service usually includes:

• A visual inspection of the boiler, controls and pipework for signs of corrosion, leaks or damage.
• Removing the casing to check internal components.
• A flue and combustion check using a flue gas analyser to confirm the boiler is burning cleanly and safely.
• Gas pressure and flow testing to make sure the boiler is operating within manufacturer settings.
• Checking safety devices and seals are working correctly.
• Cleaning key components where needed.
• A check for carbon monoxide risks and correct ventilation.
• A written service record confirming the work carried out.

Before the engineer starts, it’s reasonable to ask to see their Gas Safe ID card; every registered engineer carries one. For a fuller breakdown of each step, see our guide on what does a boiler service includes.

A real service includes safety, combustion and efficiency checks plus a written record, not just a visual once-over.

How much does a boiler service cost across Leicestershire?

The average boiler service cost in the UK is around £100 in 2026, and the job usually takes about one to two hours. Most homeowners pay roughly £80–£120 for a standard gas boiler service, with £100 a realistic benchmark. 

Location matters. In the Midlands, prices tend to fall between £80 and £110, while London homeowners typically pay £120–£140. So a boiler service in Leicestershire generally works out cheaper than the headline national figures you’ll see quoted online. 

Here’s a guide to boiler service cost by boiler type in 2026:

Boiler type	Typical service cost (2026)	Notes
Gas combi	~£80–£120	Simplest and quickest to service
Gas system / regular	~£90–£130	More components and a separate cylinder
Oil boiler	~£100–£150*	Requires an OFTEC registered engineer
Service + Gas Safety Certificate (CP12)	~£100–£150	Common combined booking for landlords

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A few things worth knowing before you book:

• Watch for call-out fees. A service is usually a fixed-price job, but emergency or out-of-hours visits cost more. The average UK call-out fee is around £75, on top of the hourly rate for any work. 
• Book in the quieter months. Arranging your service in spring or summer can reduce costs and helps you avoid last-minute call-outs, since emergency repairs tend to cost more. 
• Repairs are quoted separately. The service fee covers the inspection; any parts or repairs identified should be quoted and agreed on their own.

For a firm price and to get booked in, arrange your annual boiler service Leicestershire with our team no hidden extras- and any repairs agreed with you first.

Budget around £80–£110 for a gas combi service in Leicestershire; oil and system boilers cost a little more.

Why does an annual boiler service matter?

Regular boiler servicing is one of the easiest ways to protect both your home and your wallet. There are three strong reasons not to skip it.

1. It keeps your warranty valid.

This is the one that catches people out. Major manufacturers, such as Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann, require a documented annual service by a Gas Safe-registered engineer to keep their multi-year warranties valid. Miss a service, and you could void cover on a repair worth hundreds of pounds. The manufacturer is entitled to ask for your service records before paying out. 

2. It keeps your family safe.

A gas boiler that isn’t serviced can develop faults that lead to carbon monoxide leaks, a gas that’s both odourless and dangerous. An annual service checks that the flue, ventilation and safety devices are all working as they should.

3. It protects efficiency and lowers running costs.

A well-maintained boiler burns fuel more cleanly and runs closer to its rated efficiency. A neglected one works harder for the same heat, which pushes up your energy bills over time. Catching a minor fault early is also far cheaper than an emergency boiler repair cost in the depths of winter.

In short, an annual service is highly recommended because it can save you money on running costs, protect your warranty and prevent breakdowns a small yearly outlay against a much larger risk.

Servicing protects your warranty, your safety and your energy bills; the maths favours the service every time.

How often should you service a boiler?

You should service your boiler once every 12 months by a Gas Safe-registered engineer. New boilers should have their first service within the first year to keep the warranty intact. Oil boilers should also be serviced annually by an OFTEC-registered engineer.

It’s worth being precise about the law here, because “service” and “legal check” are not the same thing:

• Homeowners are not legally required to have an annual service, but it is a manufacturer’s warranty condition and strongly recommended. 
• Landlords are legally required under the Gas Safety (Installation and Use) Regulations 1998 to arrange an annual gas safety check on all gas appliances, carried out by a Gas Safe registered engineer. This produces a Gas Safety Certificate (CP12), which must be provided to tenants within 28 days of the check, or before a new tenant moves in.

A gas safety check and a full service overlap but aren’t identical; a boiler service is more comprehensive and includes all the checks of a gas safety inspection and more. Many landlords sensibly book both together. If you’d rather spread the cost, service plans let you budget the annual service across monthly payments.

Once every 12 months. Recommended for homeowners (and needed for your warranty); legally required as an annual gas safety check for landlords.

Who provides boiler servicing in Coalville, Leicester & Swadlincote?

As your local heating team, we cover boiler servicing right across the East and West Midlands, including Coalville, Leicester and our home town of Swadlincote.

Booking a local, Gas Safe registered engineer has real advantages over a distant national provider: lower call-out costs, faster appointments, and someone who knows the area and can come back quickly if you ever need them.

• Coalville: Our boiler engineers in Coalville handle annual servicing, safety checks and repairs. You can also read more about our dedicated boiler service Coalville options.
• Leicester: Book a boiler service Leicester appointment with a team that covers the city and surrounding villages.
• Swadlincote: As a Swadlincote-based business, we’re on hand for boiler servicing, maintenance and emergency cover across South Derbyshire and North West Leicestershire.

Whether you need a one-off service, a landlord CP12, or ongoing cover, we’ll keep your heating and hot water running safely all year round. We also handle boiler installations and full central heating installations if your system is due an upgrade.

Takeaway: Choosing a local Leicestershire engineer means lower costs, quicker appointments and support that’s genuinely nearby.

What to budget for a boiler service in 2026

• A standard annual boiler service costs £80–£120 nationally; expect £80–£110 in Leicestershire for a gas combi.
• Oil and system boilers cost a little more; a service + CP12 combo runs around £100–£150.
• Annual servicing is highly recommended for homeowners (and required to keep most warranties valid); it’s a legal annual gas safety check for landlords.
• Service your boiler once every 12 months, always with a Gas Safe (or OFTEC, for oil) registered engineer.
• Booking a local engineer in Coalville, Leicester or Swadlincote keeps call-out costs and waiting times down.
• Regular servicing helps you avoid a far bigger emergency boiler repair cost later.

Trusted Plumbing & Heating Across the East and West Midlands

When plumbing problems strike, you need a team that combines skilled workmanship with fast, reliable service that’s where Lonsdale Plumbing excels. Whether it’s a leaky faucet, a full bathroom installation, or emergency repairs, their experienced engineers deliver quality solutions backed by friendly customer care. Don’t let plumbing issues disrupt your day or damage your property; contact Lonsdale Plumbing Ltd at 12 Westfield Road, Leicester, LE3 3HL, United Kingdom. Call 0116 266 2386 to request a quote or book your service today.