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Boiler Installation London

Fixed-price boiler installation in London (N1, SE15 and W12), serving Islington, Peckham, Brixton and Shepherd’s Bush. Start with an online quote for boiler replacement today.

Next-day installation slots
Up to 12-year warranty
Gas Safe registered engineers
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Reliable Boiler Installation & Replacement in London

London’s Victorian and Edwardian terraces shape most of the boiler installations we carry out across N1, SE15 and SW9. Many homes in Islington, Peckham and Brixton have been converted into flats, so the boiler often sits in a cramped kitchen cupboard with a flue running through a party wall, and we survey access and flue routes first.

Thames Water supplies the capital with hard water drawn largely from the River Thames, the River Lee and chalk aquifers. Limescale builds up quickly inside heat exchangers, so on every installation in E17, SE22 and NW6 we flush the system, fit a magnetic filter and recommend scale protection to keep your new boiler efficient for years.

Whether you’re replacing an old boiler in a Shepherd’s Bush mansion flat, a Walthamstow terrace or a Kilburn maisonette, our Gas Safe engineers commission every system to manufacturer standards and register the warranty, so your new London boiler runs efficiently from day one.

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Why Replace Your Old Boiler in London

Many of the boilers we replace in London are 12 to 15 years old or more, fitted when flats were converted and never upgraded since.

Solid-wall Victorian brickwork and single-glazed sash windows let heat escape quickly, so an inefficient boiler burns far more gas to keep London homes comfortable through damp winters.

Converted flats in N1, SE15 and NW6 often share pipe runs with neighbours, and an ageing boiler squeezed into a kitchen cupboard is one of the most common breakdown call-outs we attend.

Many central and inner London buildings are listed or sit in conservation areas, so we plan flue terminals carefully and check whether a freeholder or managing agent must approve the work.

Many older London terraces and maisonettes still use regular boilers with loft tanks that can freeze or leak. Switching to a combi removes those tanks, frees up valuable space in tight homes and gives instant hot water whenever you turn on the tap.

A new A-rated boiler lowers bills, adds smart heating controls and carries a manufacturer warranty of up to 12 years, so London households face fewer breakdowns.

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Our Best-Selling Boiler Packages in London

Browse our most popular boiler installation packages, selected to suit different property sizes, hot-water requirements and budgets in London.

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Areas We Cover

We provide home energy installations nationwide, helping families across the UK upgrade their heating and energy systems. With next-day installation slots often available, getting started couldn’t be easier.

We have major hubs in Wales, London and the Midlands. Our accredited engineers deliver a fast, reliable service wherever you live. You can get a quote online today using our streamlined system, and we’ll match you with an engineer in your local area.

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How Much Does a New Boiler Cost in London?

In London, a like-for-like combi replacement usually costs between £1,800 and £3,500 fully installed, depending on the brand and output. This covers most flats and terraces in Islington, Brixton and Peckham, where the new boiler stays in the same position.

For a system or regular boiler, found in larger houses in Kilburn, Walthamstow and East Dulwich, expect around £2,200 to £4,000, particularly if the cylinder or loft tank also needs replacing.

Converting from a tank-fed system to a combi, removing a back boiler or re-routing a flue in a conservation area or mansion block typically costs £3,000 to £5,000. EazyHeat provides a fixed, itemised quote before any work begins.

Your London quote is itemised so you can see where every pound goes, from the boiler and flue to controls, labour and commissioning, and the figure we agree before work starts is the figure you pay once the job is done.

Choosing the Right Boiler When Replacing Your Old Gas Boiler in London

When it comes to replacing an existing gas boiler, you have several options depending on your home, lifestyle, and budget in London.

Combination Boilers (Combi) London

  • Heat your central heating and hot water directly from one compact unit.
  • No separate hot water cylinder needed.
  • Best suited to Islington or Peckham flats and homes with one bathroom.
  • Highly energy-efficient, with minimal heat loss.

Ideal for: compact flats, maisonettes and small to medium terraces in areas like Islington and Peckham.

System Boilers London

  • Take water directly from the mains and store it in a hot water cylinder.
  • Provide a constant supply of hot water to multiple taps at once.
  • More suited to larger Kilburn or Walthamstow homes with higher hot water demand.

Ideal for: Families with multiple bathrooms in larger Edwardian houses in SE22 and E17 and households with heavy daily hot water use.

Regular Boilers (Conventional) London

  • Also known as traditional or heat-only boilers, still common in older London terraces and maisonettes.
  • Use a separate hot water cylinder and cold water storage tanks, typically in the loft space.
  • Best for homes with an existing tank-fed setup in Walthamstow or Brixton.

Ideal for: Large period houses in NW6 or SE22 already configured for a regular boiler, or with high hot water needs.

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Flexible ways to pay

Choose from a range of convenient payment options, including flexible finance plans or paying for your installation in full.

Flexible Monthly Repayments

Representative APR 11.9% (fixed)

Spread the cost of your installation over a longer repayment term with manageable monthly payments.

As long as your scheduled monthly payments are maintained, you can make additional payments at any time. Overpayments may help reduce the total interest charged and shorten the length of the agreement.

You will also receive the additional protections provided by the Consumer Credit Act 1974.

Representative example: Cash price £2,000. No deposit required. Total amount of credit £2,000. Interest rate 11.9% per annum fixed. Representative APR 11.9%. Agreement term 60 months. 60 monthly payments of £43.78. Total amount repayable £2,627.08.

Cash, Card or Bank Transfer

Pay for your installation in full

Choose from several convenient ways to pay for your installation:

  • Make an online bank transfer to Eazy Heat Ltd. using the bank details shown on your invoice. This is our preferred payment method.
  • Make a card payment over the phone through our office.
  • Make a cash payment after your installation has been completed.
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We act as an introducer appointed representative of Vendigo, we’ll never quote you real time rates. We’ll simply send you a link to apply for finance from them.

EAZY HEAT LTD (FRN: 1020736)] is an Appointed Representative of Koze Group Ltd, a credit broker, not a lender. Koze Group Ltd is authorised and regulated by the Financial Conduct Authority (FRN 811281) and registered in England (08357963). We offer finance products from a panel of lenders. Credit is subject to age and status.

Why Choose EazyHeat?

At EazyHeat, we don’t just install systems. We provide a complete, customer-focused experience that puts speed, simplicity, and service first. Homeowners across the UK choose us for:

Fast Turnaround Times

Choose your install date, and we’ll do the rest. No drawn-out processes or unnecessary delays.

12-Year Warranty as Standard

All boiler installations come with a market-leading 12-year parts and labour warranty.

Highly Rated Service

We’re proud of our reputation. From initial quote to final handover, we deliver consistently top-rated service across the UK. That’s why we’re rated Excellent on Trustpilot!

Gas Safe Registered Installers

Every job is carried out to the highest safety standards by our fully qualified, experienced engineers.

UK-Wide Coverage

No matter where you’re based, we’ve got expert installers ready to help – from major cities to rural towns.

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What Our Customers Are Saying

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Boiler Installation FAQs

Yes. Compact combi models suit most flat and maisonette cupboards. We measure clearances, plan a flue route that meets Part J rules and check whether your freeholder or managing agent must approve the work, so your installation stays compliant and disruption to neighbours stays low.

It depends on the building. Flues on front elevations of listed buildings or in conservation areas across Islington, Kilburn and Westminster can need consent. We suggest rear or roof terminals first, check the building’s status with the council and help you contact the right department where approval is required.

Thames Water supplies hard water, so limescale can reduce efficiency and shorten heat exchanger life. We flush the system, fit a magnetic filter and can add scale protection. Annual servicing keeps the boiler running well and protects your manufacturer warranty.

A like-for-like combi swap in a typical London flat or terrace takes 4 to 6 hours. Removing a back boiler or converting from a regular system usually takes a full day. We plan parking and access in advance, tidy up fully and explain your new controls before we leave.

We install boilers across Greater London, including Islington (N1), Peckham (SE15), Brixton (SW9), Kilburn (NW6), Walthamstow (E17) and Shepherd’s Bush (W12), as well as neighbouring boroughs such as Hackney and Brent. If your postcode is not listed, we also cover nearby Westminster, St Albans and Chelmsford.

Speak With Our Boiler Experts

For personal guidance about your property or installation, call EazyHeat on 0330 133 5170.

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