New Boiler Cost 2026: UK Prices & Installation Costs

A new boiler does not have one fixed price because every home and heating system is different. In practice, the biggest difference is usually not the boiler brand itself, but how much work is needed to install it properly.

A straightforward combi-for-combi replacement in the same suitable position will normally cost less than moving the boiler, changing the system type or altering a lot of pipework.

That is why I would always compare what is actually included in a boiler installation quote rather than choosing on the headline price alone.

Quick Answer:

Let’s Heat currently offers fully fitted boiler packages from £1,799 for an Essential Combi replacement. The Smart Combi package starts from £2,350, while the System Boiler Upgrade starts from £2,999.

For wider UK context, Energy Saving Trust currently uses around £3,500 as the average cost of replacing a gas boiler in Great Britain with an A-rated boiler and thermostatic radiator valves.

Your actual price depends on the boiler selected, existing heating system, flue, controls, pipework and whether the boiler is staying in the same position or the system is being changed.

You can compare our current new boiler options or request a quote based on your own home.

🔑 Key Points:

• A like-for-like boiler replacement is normally the simplest and lowest-cost installation.
• Moving the boiler or changing boiler type normally adds labour and materials.
• Compare boiler quotes by what is included, not only by the total price.
• A magnetic filter, controls and system cleaning may already be included in the installation package.
• A full power flush is not automatically required with every new boiler.
• The right boiler should be selected around the property and hot-water demand, not simply the highest kW output.
• Gas boiler installation must be completed by a suitably qualified Gas Safe registered engineer.

Current Let’s Heat Boiler Package Prices

These are our current starting package prices. Every final quotation still needs to be confirmed against the property and the work required.

Package availability and boiler suitability need to be confirmed before installation. You can see our new boilers page for the current options.

What Changes the Cost of a New Boiler?

What I would normally check first is the existing boiler type, the number of bathrooms, the property’s heating requirement, where the boiler is going and the condition of the existing system.

Those things normally tell you much more about the likely installation cost than the boiler brand alone.

Typical Boiler Installation Extras

This is worth checking because two quotes can look very different simply because one installer has included more of the installation than the other.

The figures below are general UK budgeting guides, not fixed Let’s Heat charges. Some of these items are already included within our current boiler packages.

If your heating system has heavy sludge, poor circulation or persistent cold spots, you can also read our guide to power flush costs.

Is It Cheaper to Keep the Boiler in the Same Place?

Usually, yes. Keeping the boiler in the same suitable position often reduces the amount of new pipework required and may allow a simpler flue and condensate route.

That does not mean every existing position should automatically be kept. In practice, moving a boiler can make sense if it improves access, frees up useful kitchen space or works better with a planned renovation.

If you are considering a new position, read our guide to moving a boiler and relocation costs.

Does Changing Boiler Type Cost More?

Normally, yes. Replacing the same boiler type is usually more straightforward than changing the whole heating arrangement.

Combi to combi

If you already have a combi boiler, replacing it with another combi in the same suitable position can be relatively straightforward, subject to checks on the gas supply, flue, condensate, controls and heating system.

System boiler replacement

A system boiler works with stored hot water, so the cylinder, controls and valves also need to be considered.

If this is the system you currently have, see our system boiler replacement page.

Regular or heat-only boiler replacement

A regular boiler normally works with a hot-water cylinder and feed tanks. Keeping that arrangement can sometimes make more sense than automatically converting everything to a combi.

Regular or system boiler to combi

Changing to a combi may involve removing or isolating a cylinder and tanks and altering the existing pipework.

See our guide to replacing a regular boiler with a combi if you are considering this type of conversion.

Back boiler replacement

A back boiler replacement is usually a larger job because a suitable new boiler location has to be found and more of the existing heating system may need altering.

Our back boiler replacement guide explains what is normally involved.

If you are unsure what system you currently have, see what type of boiler do I have? or compare the different types of boiler systems.

How Do I Know Which Boiler I Need?

Do not choose a boiler simply because it has the biggest output number.

For a combi boiler, I would look closely at the incoming mains-water flow and how much hot water the household actually uses. For the heating side, the property size, insulation and radiator requirements matter.

A smaller home with one bathroom may suit a combi very well. A larger household that regularly needs hot water from more than one outlet at the same time may be better suited to stored hot water.

Our guide to choosing the right boiler for your home explains this in more detail.

You can also compare our best combi boilers and best boilers in the UK.

What Should a New Boiler Quote Include?

This is one of the most important things to check when comparing boiler prices.

A lower quote is not necessarily better value if important parts of the installation have simply been left out.

• The exact boiler make, model, type and output
• The proposed boiler position
• The flue and any additional flue components
• Heating controls
• Magnetic system filter
• System cleaning and corrosion inhibitor
• Any changes to gas or heating pipework
• Condensate drainage
• Removal and disposal of the old boiler
• Commissioning and handover
• Manufacturer warranty registration
• Building Regulations notification where applicable
• VAT, exclusions and any provisional work

Should You Repair the Old Boiler Instead?

Sometimes, yes.

I would not recommend replacing a boiler simply because it has developed one repairable fault.

The boiler’s age, condition, repair cost, availability of parts and recent breakdown history all matter.

If the boiler is otherwise in reasonable condition and the repair makes sense, a boiler repair may be the better option.

If breakdowns are becoming frequent or expensive, read our guide on how long a boiler should last and our boiler replacement cost guide.

How Long Does a New Boiler Take to Fit?

A straightforward boiler replacement can normally be completed much quicker than a relocation or system conversion.

The amount of pipework and system alterations usually matters more than the boiler brand itself.

See our guide to how long a boiler takes to fit for the common installation scenarios.

Can You Spread the Cost of a New Boiler?

Finance options may be available if you would rather spread the cost of a new boiler.

Do not look only at the monthly payment. Check the cash price, deposit, APR, repayment term and total amount payable before choosing finance.

See our current boiler finance options. Finance is subject to status, eligibility, lender approval and availability.

New Boiler Costs in Cardiff, Bristol and Newport

The work required normally makes a bigger difference to the final boiler price than the postcode alone.

For local installation information, see our pages for boiler installation in Cardiff, boiler installation in Bristol and boiler installation in Newport.

Safety and Certification

Gas boiler installation must be completed by a suitably qualified Gas Safe registered engineer.

Your installer should also ensure the relevant work complies with current Building Regulations and that the required documentation is provided.

Let’s Heat operates under Gas Safe Registration No. 977042. You can check a gas business or engineer through the Gas Safe Register.

Frequently Asked Questions

How much does a new boiler cost in 2026?

Let’s Heat currently offers fully fitted boiler packages from £1,799, subject to the property and installation being suitable. More involved work such as moving the boiler or changing the heating-system type can increase the final cost.

What is included in a new boiler installation?

It depends on the package. Current Let’s Heat packages include items such as the boiler installation, standard flue, controls, magnetic filter, chemical system flush, corrosion inhibitor and removal of the old boiler. Always check the final quotation for your property.

Does a new boiler need a magnetic filter?

A magnetic filter helps capture magnetic debris circulating in the heating system and helps protect the boiler. A magnetic system filter is included in the current Let’s Heat boiler packages.

Do I need a power flush with a new boiler?

Not every heating system needs a full power flush. The condition of the system should be assessed first. A heavily contaminated system may need more intensive cleaning, while another system may only need the appropriate chemical cleaning and treatment.

Is it cheaper to keep the boiler in the same place?

Usually, yes. Keeping the boiler in the same suitable position normally reduces the amount of new pipework and can keep the flue and condensate work simpler.

Can I keep my existing radiators?

Often, yes. If the radiators are in good condition, correctly sized and heating properly, there may be no reason to replace them. Leaks, corrosion, sludge or poor heat output should be assessed before the new boiler is commissioned.

Is a combi boiler cheaper to install?

A straightforward combi-for-combi replacement is often one of the simpler boiler installations. Converting a regular or system boiler to a combi normally involves more work because the cylinder, tanks or pipework may need changing.

Should I replace a 10-year-old boiler?

Not simply because it is 10 years old. I would look at its condition, reliability, repair history, parts availability and whether it still suits the property before recommending replacement.

How long does a new boiler installation take?

A straightforward replacement can normally be completed much quicker than a system conversion or boiler relocation. The actual time depends on the work required at the property.

Can I pay monthly for a new boiler?

Finance may be available, subject to status and lender approval. Compare the cash price, APR, deposit, repayment term and total amount payable as well as the monthly payment.

How often should a new boiler be serviced?

Follow the boiler manufacturer’s servicing requirements and warranty conditions. Annual servicing is commonly required. You can see our servicing information on the boiler service page.

Get an Accurate New Boiler Price

Online boiler prices are useful for budgeting, but the important figure is the price for your actual home.

Tell us what boiler you currently have, how many bathrooms you use, where the boiler is located and whether there are any known problems with the heating system.

From there, we can look at a suitable boiler and the installation work required rather than guessing from a generic national average.

Get your new boiler quote from Let’s Heat.