New Boiler Cost & Installation Prices
Understanding the cost of a new boiler is one of the first steps when planning a replacement.
Across Buckinghamshire, Berkshire and West London, a new boiler installation typically costs £2,000 to £4,500+. A straightforward combi swap starts from around £2,000.
Every job starts with a free home survey and a fixed quotation that includes VAT. There are no hidden extras.
Guide prices reviewed October 2026.
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How Much Is a New Boiler?
The price depends on the boiler you need and how much work your heating system needs. The main factors are:
- A like-for-like swap, or a change of boiler type such as a system boiler to a combi
- Moving the boiler to a new position
- Flue or pipework alterations
- New controls, a system flush, a filter or other upgrades
- The boiler model, output and guarantee length you choose
A combi replaced in the same position is usually the simplest job. Your survey confirms exactly what your home needs.
As a guide, most professionally installed boilers fall within the ranges below.
Example New Boiler Costs by Property Size
These examples reflect competitive local pricing in Buckinghamshire, Berkshire, London and nearby areas. They include supply, installation and VAT.
Bedroom count is only a rough guide. Hot water demand, the number of bathrooms and your existing system matter more.
Smaller Properties & Flats
(1-2 Bedrooms / Flats)
A combi boiler installation in a smaller property typically starts from around £2,000, with most installations falling between £2,000 and £3,000.
These systems are well suited to flats and smaller terraced homes with one bathroom, where a compact boiler can provide heating and hot water directly from the mains without the need for a cylinder.
Medium Sized Homes
(3-4 Bedrooms)
For a typical three or four bedroom home, new boiler costs generally range from £2,500 to £3,500.
Depending on hot water demand and system layout, this may involve a larger combi boiler or a system boiler working alongside a hot water cylinder. Correct sizing is important to ensure efficient operation and long-term reliability.
Larger or High Demand Properties
In larger properties or homes with multiple bathrooms, installation costs commonly range from £3,500 to £4,500+.
These installations may require higher output boilers, upgraded controls, or modifications to existing pipework. In some cases, a regular or system boiler is more appropriate to ensure consistent hot water supply.
All figures above are guide prices. A fixed quotation is always provided following survey.
Combi Boiler Cost
A combi boiler is the most common type of replacement in the UK. For a straightforward like-for-like installation, a combi boiler cost typically falls between £2,000 and £3,500, depending on the brand, output size and guarantee selected.
Combi boilers are popular because they are compact, energy efficient and eliminate the need for a separate hot water cylinder. However, they are not always the right solution for larger homes. This is why proper system assessment is essential before installation.
Boiler Replacement Cost
When replacing an existing boiler in the same position, installation is usually simpler and more cost effective. In these cases, a boiler replacement starts from around £2,000 for a straightforward combi swap.
Costs increase if the boiler is being relocated, if a conversion is required, or if the heating system needs updating to meet manufacturer requirements. We explain any recommended upgrades clearly so you understand both the reason and the benefit.
Where eligible, our £300 boiler scrappage discount is already included in your quoted price.
What Is Included in a New Boiler Installation?
When comparing the cost of a new boiler, it is important to understand what is included in the price. Our professional boiler installations typically include:
- A professional home survey and system assessment
- Correct boiler sizing and system design
- Boiler supply and installation
- Removal and responsible disposal of your old boiler
- Standard flue and fittings
- Commissioning and safety checks
- Warranty registration with the manufacturer
- Gas Safe certification
We focus on installing boilers correctly rather than simply installing them quickly. That difference matters when it comes to long-term performance and warranty protection.
Why Our Boiler Costs Reflect Long-Term Value
We are Worcester Bosch Platinum accredited installers, and accredited installers for Vaillant, Ideal and other leading brands. Our engineers fit around 200 boilers a year. Worcester Bosch guarantees of up to 12 years are available on selected models.
As a company established in 1948, we are plumbing, heating and renewable energy specialists, not just boiler installers. That wider expertise ensures your heating system is designed properly from the start.
Is It Worth Replacing an Older Boiler?
Modern A-rated boilers are significantly more efficient than older systems. Replacing an ageing boiler can improve heating performance, increase reliability and potentially reduce energy waste. If your current boiler is over 10 to 15 years old or experiencing repeated faults, a replacement may prove more cost effective over time than ongoing repairs.
Not sure yet? Read about common boiler faults or arrange a boiler repair.
Request a free boiler quote today
0% BOILER FINANCE
Spread the Cost of a New Boiler
We offer 0% boiler finance with fixed monthly payments over 12 to 48 months through Novuna Personal Finance. Repayments start after your boiler is installed.
Finance is subject to status and affordability checks. We act as a credit broker, not a lender.
New Boiler Cost FAQs
We provide professional boiler installation and heating services across Buckinghamshire, Berkshire, West London, Oxfordshire and surrounding counties. Here are some frequently asked questions about our boiler installation costs.
How much does a new boiler cost for homes across Bucks, Berks and London area?
Most new boiler installations range from £2,000 to £4,500+, depending on the boiler type, your property and the work required. Guide prices include VAT.
What is the average cost of a combi boiler installation?
A straightforward combi replacement typically costs £2,000 to £3,500, including supply, installation and VAT.
How do I compare boiler quotes?
Check that each quote covers the same work. Compare the boiler model and output, the installation scope, controls, flue, system flush or filter, guarantee length and any exclusions.
A fixed, itemised quotation makes comparison easier. Ours lists everything included before work begins.
Are you Gas Safe registered boiler installers?
Yes. All our engineers are Gas Safe registered and fully qualified to install gas boilers safely.
Do you offer finance for boiler installations?
Yes. We offer 0% finance over 12 to 48 months through Novuna Personal Finance, subject to status and affordability. We act as a credit broker, not a lender.
Do you provide fixed quotations?
Yes. We carry out a survey and provide a clear, fixed quotation with no hidden charges.
How much does it cost to fit a new boiler?
Our prices cover supply and fitting together. A straightforward combi swap starts from around £2,000, including VAT.
Fitting costs more if the boiler moves, the boiler type changes or the system needs upgrades. Your fixed quote shows exactly what is included.
How much does a system boiler cost?
System boilers suit homes with higher hot water demand and work with a cylinder. Most system boiler installations fall between £2,500 and £4,500+.
The cost depends on the boiler output and whether the cylinder also needs replacing.
How much does it cost to move a boiler?
Moving a boiler adds to the cost because it needs extra pipework, a new flue route and condensate work. It can also add time to the installation.
We assess the new position during your survey and include it in your fixed quotation.
Do your prices include VAT?
Yes. Our guide prices and every fixed quotation include VAT.
Is the £300 scrappage discount included in the price?
Yes. Where eligible, the £300 boiler scrappage discount is already included in your quoted price. We confirm eligibility during your survey.
A Trusted Family-Run Plumbing and Heating Company Since 1948
We are a family-run plumbing and heating company established in 1948. Homeowners and businesses across Buckinghamshire, Berkshire and West London choose us for reliable workmanship, honest advice and a professional approach. >Learn more about our award-winning team.
✔ Family run business established in 1948
✔ Gas Engineers who live and work locally
✔ Clear advice and costs before work begins
✔ Payment only once the job is complete
All contact with Red Van plumbers has been a pleasure everyone I have spoken to were extremely helpful and pleasant and the engineers all did a great job without any mess, thank you very much.
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We have been using the Red Van Plumbers for more years than either of us can remember. Always the same reliable service, prompt attention to detail and most courteous of operatives at a sensible price. Highly recommended yet again.
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Speak to Our Installation Team
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The Red Van Plumbers are one of the most established plumbing and heating companies in South East England. Established 1948