How Much Does a New Boiler Cost [2026]

It’s a new year, and you might be in the market for a new boiler in 2026. With the lifespan of most boilers being between 10-15 years, it could have been a long time since you’ve even needed to buy a new boiler.

After all, a lot has changed over the last 10-15 years.

For example, 16 years ago, in 2010, Lady Gaga wore a meat dress to the MTV Video Music Awards. And 10 years ago, in 2016, Drake released “One Dance”.

Considering how much the world has changed, the boiler sector has seen many developments, from improvements in energy efficiency to new technological features.

Also, economically, the country has changed dramatically. Be aware that all our listed prices for new boilers include installation by a WarmInstaller (a Gas Safe registered engineer), as well as:

• System filter
• System cleanse
• Guarantee
• Smart Thermostat
• And what our WarmInstallers call “extra bits and bobs” to get you up and running.

However, before we get ahead of ourselves, do you need a new boiler in 2026?

Do I Need To Replace My Boiler Or Just Repair It?

Before you take our survey for the best new boiler to install in your home, let’s see if you want to repair your current boiler.

Here are some key factors to consider if repairing your boiler:

• It is less than eight years old and has been regularly serviced.
• If the repair cost is significantly lower than replacing it.
• Your Gas Safe registered engineer can quickly source parts.
• The unit is still efficient by modern standards and meets your home’s heating needs.

However, you will need to replace your boiler if:

• Your boiler is over 10 years old and has had multiple repairs.
• Energy bills are rising due to inefficiency, and your system isn’t performing well.
• Your boiler is leaking carbon monoxide or failing safety checks.
• Major components like the heat exchanger or pump have failed.
• You want to upgrade to a more eco-friendly heating system or a hydrogen-ready boiler.

Suppose you are considering selling your property within the next year. In that case, GoCompare’s Property Investment Calculator estimates that installing a new boiler and central heating system will each increase the property’s value by 4%.

The company also estimates that installing an electric car charging point will increase the property’s value by a whopping 13%.

If you’re exploring a fantastic investment opportunity for 2026, consider installing a new boiler or an electric vehicle charging point. It’s a great way to see a quick return on your investment!

But what is the cost of buying a new boiler in 2026?

Boiler Types And Costs In 2026

When buying a new boiler in 2026, you must know what type is installed in your home. There are three common types of boilers in the UK, which include the following:

Combination (Combi) Boilers

According to the Heating and Hotwater Industry Council, 80% of boilers sold in the UK in 2020 were combi boilers, where the home has no hot water cylinder.

Their popularity is due to the fact they are:

• Compact
• Energy-efficient
• As well as being able to provide both hot water and heating around the home.

Another bonus is combi boilers do not need a separate water tank as they only heat what’s required.

System Boilers

System boilers are ideal for homes with multiple bathrooms because they provide good water pressure. They have an integrated hot water cylinder but do not have a cold water storage tank.

Regular Or Conventional Boilers

Regular boilers have a hot water cylinder (usually in the airing cupboard) and a cold water storage tank in the attic or loft.

Like system boilers, regular boilers can provide hot water for multiple bathrooms simultaneously but require a lot of storage space due to the additional cold water tank.

According to the data collected by Checkatrade, the average costs of the boiler itself and installation are as follows:

After reviewing the costings you might notice that the boilers have a kW rating. But what do these kW ratings mean?

What kW Rating Does Your New Boiler Need To Be?

When browsing through your boiler options, you will notice a reference to kilowatts (kW).

kW is arguably one of the most important factors to consider when buying a boiler, as it directly affects the unit’s:

• Performance
• Efficiency
• And its suitability for your property.

A correctly sized boiler guarantees enough heating and hot water to keep your home warm.

Generally:

• Low kW boilers (12-24 kW) are Ideal for smaller homes or apartments with about 10 radiators and one bathroom.
• Medium-kW boilers (24-35 kW) are suitable for medium-sized homes with multiple bedrooms, 15 radiators, and two bathrooms.
• High kW boilers (35+ kW) are designed for larger homes or properties with up to 20 radiators and three bathrooms.

Selecting a boiler based on its kW rating can be tricky, but our online new boiler survey will help you make the correct decision. All you need to do is answer a few easy questions.

Now that we better understand a kW rating, what are other potential additional costs associated with installing a new boiler in 2026?

Additional Costs With Installing A New Boiler In 2026

Purchasing a new boiler and installing it can be a straightforward swap. However, life is unpredictable.

As mentioned, replacing your old combi boiler with a new one in the exact location can cost around £1,000 – £2,000.

The same job with a system and conventional boiler is estimated to cost +/- £1,500.

But what if you need to relocate where your new pride and joy will be installed?

Moving Your Boiler’s Location

If you want or need to relocate your boiler (of any type), you can expect to pay between £300 and £800 extra.

Costs can vary depending on how far and where the boiler is being moved and what type it is.

Generally speaking, the further you move your boiler from its current location, the higher the cost. This increase is due to the labour involved in running the new pipework and the price of the materials required.

So you know, WarmZilla charges a fixed rate of £150 to move your boiler within the same room, £300 for other rooms and £500 to move your boiler into the loft.

But what if there’s a problem with the system’s pipelines?

Replacing Pipelines

Older boilers’ heating systems were sometimes installed with 15mm copper pipes (too narrow nowadays) or old lead pipes from the main gas supply.

The updated modern regulations require the pipeline to be able to handle new pressure levels, so it must be replaced with a 22mm copper pipe.

Also, it should be mentioned that some older 22mm copper piping can develop weakness and now can’t handle the pressure load, which means it needs to be replaced.

Upgrading pipework usually costs between £300 and £500, but luckily, WarmZilla doesn’t charge extra for it, as it’s included in the quote.

Our WarmInstallers won’t ignore piping that needs to be replaced, as they could lose their credentials, and it is hazardous to leave it unaddressed.

Installing A System Filter

A boiler system filter is an excellent addition as it helps maintain the efficiency and longevity of central heating systems. There are various types of system filters that help remove external particles from your heating system.

These filters are usually designed to remove magnetic (ferrous) or non-magnetic particles. If left, they can form sludge and cause a blockage, requiring a power flush.

Installing a filter system can improve your boiler’s heating efficiency and, in turn, reduce bills.

Usually, this is an additional purchase when installing a new boiler that can set you back between £60 – £160 with £50 – £150 for installation.

However, our WarmInstallers will fit one to your new boiler at no additional charge, as it is included in the quote.

If a filter was not installed in your last boiler’s heating system, a Gas Safe registered engineer could suggest performing a power flush before installing the new unit.

But what’s a power flush?

What’s A Powerflush And How Much Does It Cost?

Depending on the state of your boiler’s heating system, experts could suggest performing a power flush before installing a new unit to remove old debris and check for blockages.

To perform a power flush, you will need a specialised machine. This machine pumps cleaning chemicals into your boiler’s system at high pressure to remove all the built-up sludge and other debris.

A power flush usually takes 4 to 8 hours to complete, but it can take longer depending on the size and complexity of your home’s system and the severity of the sludge build-up.

The cost of a power flush varies depending on the number of radiators in your home, but it can be around £1,000, including VAT.

Hopefully, this isn’t needed.

Another additional cost you might need to address is if your current system needs its flue replaced or extended.

Installing A New Flue Or Extending It

Simply put, a boiler’s flue pipe connects the unit to the outside of the house and safely extracts its waste gases.

Legally, your boiler must have a flue pipe, which is why it is always included with the unit.

However, as everyone’s home is unique, you might need to extend this flue pipe, which is when you’d use a plume kit to lengthen it. A new plume kit can cost around £100 – £200.

As it is 2026, ensuring your new boiler is as efficient as possible matters. Luckily, there are now smart thermostats.

Installing A Smart Thermostat

The UK government is focused on achieving its Net Zero Carbon goal by 2050.

Achieving this goal means that traditional gas boilers will eventually be phased out. Many are pushing towards switching to hydrogen-ready boilers and hybrid heat pump systems.

Another advancement the UK government is promoting is using smart thermostats with domestic boilers.

Smart thermostats are now standard with most boiler installations and are included with WarmZilla’s quote amount.

They improve efficiency by learning your heating habits and adjusting usage accordingly.

Some of the best smart thermostat options in 2026 include:

• Google Nest Learning Thermostat (4th Gen)
• Hive Smart Mini Heating Wireless Thermostat
• Salus Controls iT800 Wifi Smart Thermostat

These devices can reduce heating bills by up to 35%, and offer added features such as geofencing, voice control, and remote adjustments via smartphone apps.

Now that we’ve covered all the possible additional costs of installing a new boiler in 2026 let’s discuss payment options.

Payment Options & Boiler Finance in 2026

Economically, times are tough, which means many need financial help. Luckily, there are multiple methods of funding a new boiler purchase.

There are two financial assistance options, which include:

• Boiler Finance (11.9% APR) — Flexible payment options over 1-10 years.
• Government Grants and Incentives: The Boiler Upgrade Scheme (BUS) and Home Energy Scotland Grant offer financial support for greener heating solutions.

If you can, it is always best to pay in full.

Before you hit pay, make sure that you’ve ticked all the boxes for making the right choice.

Making the Right Choice In 2026

Buying a boiler is a decision that will directly affect your life for 10 to 15 years.

It’s always advisable to select a boiler with a trusted reputation, brands like:

• Worcester Bosch, which is an award-winning efficiency and reliability brand.
• Viessmann, who are constantly innovating and leading the way with hydrogen-ready technology
• Vaillant is known and trusted for long-lasting durability
• Ideal Boilers, who have earned a reputation for being affordable while offering a product of high quality,

Here is a quick checklist that’ll ensure the boiler package you’ve selected is the best:

• Gas Safe installation
• A long-term guarantee (5-12 years)
• A smart thermostat for energy efficiency
• System filter and cleanse
• Hydrogen-ready or hybrid system compatibility
• Fixed-price quote with no hidden fees

Now that you’re ready, you will want to take our quick and effortless survey. But what if you have more questions?

WarmZilla Is Open For More Questions

Our team of professionals are ready to take your call no matter what additional questions you have.

Also, all our installations are performed by Gas Safe registered engineers who will be at your door within 48 hours.