How Much Does a New Boiler Cost?
Indicative UK prices for boiler installation and replacement, servicing, repairs, radiators and full central heating – plus what pushes the price up or down.
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There is no fixed price list for heating work. Every engineer prices the job in front of them, and two boiler replacements in similar houses can cost very different amounts if one is a straight swap and the other involves moving the boiler, removing loft tanks and cleaning out an old system.
The figures below are broad, indicative ranges for the UK. Use them to sense-check the quotes you receive and to budget – not as a promise of what your job will cost. For an accurate price, describe your job and compare written quotes from local heating engineers.
New and replacement boiler costs
Typical prices for supplying and fitting a new boiler, including standard controls and commissioning. Premium models, longer warranties and extra work will push prices towards the top of these ranges or beyond.
| Job | Typical UK price |
|---|---|
| Like-for-like combi boiler replacement | £2,000–£3,500 |
| Combi boiler replacement with the boiler moved | £2,500–£4,500 |
| Regular or system boiler converted to a combi | £3,000–£5,000 |
| System boiler replacement (existing cylinder kept) | £2,500–£4,000 |
| System boiler with a new unvented cylinder | £3,500–£6,000 |
| Regular boiler replacement (like for like) | £2,200–£3,800 |
| Electric boiler replacement | £1,500–£3,000 |
Indicative UK prices for supply and fitting, including VAT where the engineer is VAT-registered. They're a guide to help you sense-check quotes, not a price list – always get written quotes for your own home.
More on boiler types and what's involved in our gas boiler and electric boiler guides.
Boiler servicing and repair costs
Servicing is the most predictable cost. Repairs vary with the fault, the part and how easy it is to get – older or less common boilers can take longer to fix.
| Job | Typical UK price |
|---|---|
| Annual gas boiler service | £70–£130 |
| Landlord gas safety check | £60–£110 |
| Gas safety check and service together | £100–£180 |
| Repair call-out and first hour (parts extra) | £80–£150 |
| Common replacement part fitted (e.g. fan, pump or diverter valve) | £150–£450 |
| Printed circuit board (PCB) replaced | £250–£500 |
Indicative UK prices for supply and fitting, including VAT where the engineer is VAT-registered. They're a guide to help you sense-check quotes, not a price list – always get written quotes for your own home.
Radiator and controls costs
Radiator prices depend heavily on the style you choose. Doing several radiators in one visit is usually better value, as the system only needs draining once.
| Job | Typical UK price |
|---|---|
| Like-for-like radiator replacement (standard panel) | £200–£450 |
| New radiator with new pipework | £300–£650 |
| Column or designer radiator, supplied and fitted | £400–£1,200 |
| Heated towel rail, supplied and fitted | £200–£550 |
| Power flush (around 8–12 radiators) | £400–£750 |
| Smart thermostat supplied and fitted | £150–£350 |
Indicative UK prices for supply and fitting, including VAT where the engineer is VAT-registered. They're a guide to help you sense-check quotes, not a price list – always get written quotes for your own home.
More in our radiator installation and replacement guide.
Full central heating system costs
A complete system – boiler, radiators, pipework and controls – is a bigger project. Prices depend on the number of radiators, how easily pipes can be run and the boiler and cylinder chosen.
| Job | Typical UK price |
|---|---|
| Full central heating, two-bedroom flat (boiler, radiators, pipework) | £4,000–£7,000 |
| Full central heating, three-bedroom semi | £5,500–£9,500 |
| Full central heating, four-bedroom detached house | £7,500–£12,000 |
| Storage heaters replaced with an electric boiler and radiators (flat) | £4,000–£8,000 |
Indicative UK prices for supply and fitting, including VAT where the engineer is VAT-registered. They're a guide to help you sense-check quotes, not a price list – always get written quotes for your own home.
Heating engineer hourly and day rates
Rates are useful for small jobs and for understanding a quote, but most engineers give a fixed price for a clearly defined job such as a boiler replacement.
| Job | Typical UK price |
|---|---|
| Heating engineer, hourly rate (most of the UK) | £45–£80 per hour |
| Heating engineer, day rate (most of the UK) | £250–£400 per day |
| Heating engineer, day rate (London and South East) | £300–£500 per day |
Indicative UK prices for supply and fitting, including VAT where the engineer is VAT-registered. They're a guide to help you sense-check quotes, not a price list – always get written quotes for your own home.
What affects boiler and heating costs
- Type of boiler and conversion
- A like-for-like combi swap is the simplest job. Conversions, new cylinders and relocations add materials and labour.
- Boiler make, model and warranty
- Prices vary between brands and outputs, and longer warranties often come with higher-priced models.
- Moving the boiler
- A new position needs new gas and water pipework, a new flue route and a condensate drain.
- System condition
- Sludge, old radiators and worn valves may need a system clean or upgrades before a new boiler goes in.
- Controls and extras
- Smart thermostats, zoning, system filters and thermostatic radiator valves all add to the total.
- Flue and access
- Vertical or extended flues, lofts, flats and difficult parking all take longer.
- Location
- Prices in London and the South East tend to sit towards the top of the ranges, or above.
- Time of year
- Emergency winter work costs more. Planned replacements in spring and summer are easier to book.
Ways to keep the cost down
- Get two or three quotes and compare them line by line.
- Plan a replacement before the old boiler fails, rather than in an emergency.
- Keep the boiler in the same position if it's practical.
- Book servicing in late summer, before engineers get busy.
- Ask whether a system clean and filter are included, to protect the new boiler.
- Check the warranty conditions so you don't pay for repairs that would have been covered.
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Boiler and heating costs: FAQs
How much does a new boiler cost in the UK?
As a rough guide, a like-for-like combi replacement often costs somewhere between £2,000 and £3,500 fitted. Conversions, relocations and system boilers with new cylinders cost more. The boiler model, the work involved and your location all make a difference.
How much is a boiler service?
A standard gas boiler service typically costs around £70–£130, depending on where you live and the boiler. Some engineers offer a combined price for a service and landlord gas safety check.
Why do boiler quotes vary so much?
Quotes can differ in the boiler model and warranty, whether the system is cleaned and a filter fitted, the controls included and how much pipework or flue work is needed. Ask each engineer to itemise their quote.
Is it cheaper to repair or replace a boiler?
A one-off repair is usually cheaper in the short term. If the boiler is old, needs a costly part or breaks down often, replacement can make more sense. Get a quote for both before deciding.
How much does full central heating cost?
A full system with a boiler, radiators and pipework often costs somewhere around £5,500–£9,500 for a three-bedroom semi, depending on the number of radiators, the boiler and how easy it is to run pipework.
Should I pay a deposit for a new boiler?
A deposit for materials on larger jobs is common, with the balance paid on completion. Avoid paying the full amount up front, and agree payment terms in writing before work starts.
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