How much does a new boiler cost in the UK in 2026?

According to industry data, a new combi boiler costs GBP1,500 to GBP3,500 for the unit, a system boiler GBP1,500 to GBP3,000, and a regular boiler GBP1,500 to GBP2,500. Installation adds GBP500 to GBP1,500 for a like-for-like swap, or GBP2,000 to GBP4,000 if changing system type.

Is it worth replacing a boiler or should I get a heat pump?

It depends on your property and budget. A new gas boiler costs GBP2,000 to GBP5,000 installed and is a straightforward swap. A heat pump costs GBP8,000 to GBP15,000 but the GBP7,500 government grant can make it comparable. Heat pumps suit well-insulated homes best.

Should I repair or replace my boiler?

According to industry guidance, if your boiler is over 10-15 years old, repairs cost more than GBP500, or it breaks down frequently, replacement is usually more cost-effective. Modern condensing boilers are significantly more efficient than older models.

Can I get a grant for a new boiler?

Gas boiler grants are limited, but the ECO4 scheme may cover boiler replacement for eligible low-income households. The GBP7,500 Boiler Upgrade Scheme applies to heat pumps, not gas boilers. Some local authorities also offer emergency heating grants.

New Boiler Costs UK 2026 | Replacement Prices & Options

Important Notice

Costs quoted are compiled from installer websites, industry surveys, and trade body publications. Actual costs vary significantly by property, location, and system specification. Always get multiple quotes from Gas Safe registered engineers for accurate pricing.

Boiler Costs by Type

Combi Boiler

System Boiler

Good for homes with multiple bathrooms

Budget models £1,500-£2,000

Mid-range £2,000-£2,500

Premium £2,500-£3,000

Unit price range £1,500-£3,000

Regular Boiler

Traditional with tanks and cylinder

Budget models £1,500-£1,800

Mid-range £1,800-£2,200

Premium £2,200-£2,500

Unit price range £1,500-£2,500

Installation Costs

Like-for-Like Swap

£500-£1,500

Replacing your boiler with the same type in the same location. This is the simplest and cheapest option according to industry data.

Same boiler type (e.g. combi to combi)
Existing flue and pipework reused
Typically completed in one day

System Change or Relocation

£2,000-£4,000

Changing boiler type (e.g. regular to combi) or moving the boiler to a new location involves additional pipework and may take 2-3 days.

New pipework and flue route
Removal of old tanks or cylinders (if switching to combi)
May require building regulations sign-off

What Affects Your Boiler Cost

Location

According to industry data, boiler installation costs vary by region. London and the South East tend to be more expensive, while prices in the North and Midlands are generally lower due to differences in labour rates.

Flue Work

If the existing flue can be reused, costs are lower. A new flue route, longer flue runs, or a vertical flue through the roof can add £200-£500 to the installation.

Pipework

Older properties may need new gas pipework to meet current regulations. If the boiler is being relocated, significant pipework alterations add to the total cost.

Controls & Extras

A new thermostat, smart controls, magnetic filter, or system flush can add £100-£500 but are often worthwhile for efficiency and longevity of the new system.

When to Repair vs Replace

Consider Repairing If...

Your boiler is under 10 years old
The repair cost is under £500
It is the first breakdown in recent years
Parts are still available for your model

Consider Replacing If...

Your boiler is over 10-15 years old
Repairs are becoming frequent or expensive
Your energy bills have been rising noticeably
It is a non-condensing boiler (pre-2005 models)

According to the Energy Saving Trust, replacing an old G-rated boiler with a modern condensing boiler could save a typical household around £200-£400 per year on energy bills.

Boiler vs Heat Pump: The Full Picture

Factor	New Gas Boiler	Air Source Heat Pump
Upfront cost	£2,000-£5,000 Installed, like-for-like	£500-£7,500 After £7,500 BUS grant
Installation time	1-2 days	2-5 days
Government grants	Limited (ECO4 only)	£7,500 BUS grant
Future-proofing	Gas phase-out planned New builds from 2035	Government-backed Aligned with net zero policy

A new gas boiler remains a practical choice for many homes, especially where budget is tight or a quick replacement is needed. But if your home is well-insulated and you qualify for the £7,500 grant, a heat pump may cost a similar amount while future-proofing your heating.

Finance Options

0% Finance

Some manufacturers and installers offer 0% interest finance over 12-24 months. Check whether the total cost is inflated to cover the finance arrangement.

Boiler Subscription

Pay-monthly boiler plans from some energy suppliers include the boiler, installation, and ongoing maintenance. Compare total cost over the contract term.

ECO4 Scheme

According to gov.uk, eligible low-income households may qualify for a free or heavily subsidised boiler replacement through the ECO4 energy efficiency scheme.

Instant Eligibility Check

Check If You Qualify for a Free Boiler Replacement

The ECO4 scheme may cover boiler replacement costs for eligible households. Check your eligibility.

up to £15,000

Grant Available

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Key Eligibility Factors:

Low-income household
Property EPC rating D-G
Owner-occupier or private tenant

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New Boiler Costs UK 2026

£2,000-£5,000 Installed