Boiler Installation Prices in London
Fixed-price boiler installation with warranties, filters & flushing included.
No hidden charges. Free quote by message, call or photos.
If you’re searching for boiler installation prices in London, this page gives you honest guide prices based on real installations.
Final price is confirmed after a quick survey or photo check — most quotes done the same day.
Estimated prices and types of Boiler Installations
London Boilers PRO
Combi Boiler Installation
Ideal for flats and houses with one or two bathrooms.
📌 Price based on a standard installation with existing pipework reused.
What’s included in the price:
- Brand new A-rated combi boiler
- Standard flue and fittings
- Magnetic system filter
- Limescale/scale protection device
- Thermostat / basic controls
- Condensate pipe
- Gas Safe certification
- Removal of your old boiler
- Full commissioning & safety checks
🛡 Up to 12-year manufacturer warranty (brand dependent)
🛡 24-month workmanship guarantee
A combination or ‘combi’ boiler is both a high efficiency water heater and a central heating boiler in a single compact unit. Combi boilers heat water directly from the mains when you turn on a tap, so you won’t need a hot water storage cylinder or a cold water storage tank in the roof space.
They are also very cost-effective and energy-efficient as water is heated instantly rather than being heated and then stored in a cylinder. An added benefit is that hot water is delivered at mains pressure, which means that you could get a powerful shower without the need for a separate pump.
System Boiler Installation
Ideal for homes with multiple bathrooms or higher hot water demand.
📌 Price based on a standard installation with existing pipework reused.
What’s included in the price:
- New energy-efficient system boiler
- Flue and installation kit
- Magnetic filter
- Limescale protection
- Full chemical power flush
- Pressure and expansion vessel checks
- Commissioning & safety testing
- Old boiler removed
- Gas Safe certificate
🛡 Up to 12-year manufacturer warranty (brand dependent)
🛡 24-month workmanship guarantee
📌 Hot water cylinder not included unless stated.
System boilers require a cylinder for storing hot water, however the major heating and hot water system components are built into the boiler itself, making it quicker and easier to install. In addition, there is no need for a tank in the loft, so it can be an option in a home with little or no loft space or where the space is earmarked for a conversion.
These boilers are also compatible with solar water heating systems, which deliver environmental benefits as well as lower energy bills.
Regular (Conventional) Boiler
Best for properties with loft tanks and gravity systems.
📌 Price based on a standard installation with existing pipework reused.
What’s included in the price:
- New boiler supplied and installed
- Magnetic filter
- Flue and pipework checks
- Chemical system flush
- Commissioning
- Gas Safe paperwork
- Old boiler removed
🛡 Up to 12-year manufacturer warranty (brand dependent)
🛡 24-month workmanship guarantee
Regular boilers (sometimes known as traditional, conventional or heat only boilers) are ideally suited to homes that already have a traditional heating and hot water system which is linked to a separate hot water cylinder. These boilers also need a cold water storage tank in the loft to feed the hot water cylinder as well as a tank that maintains the water level of the central heating system.
A regular boiler may be the best option for replacing an existing boiler if the property has an older radiator system, as it might not be able to cope with the higher water pressure that is delivered by system or combi boilers.
Ready For a Fixed Quote Today?
What Affects Final Price?
Your fixed quote depends on:
- Boiler relocation
- Flue changes
- Gas pipe upgrades
- New controls / smart thermostat
- Condensate pump if required
- Pipework alterations
- Loft or restricted access
- New hot water cylinder
- Power upgrades or ventilation changes
We always confirm costs before starting work.
No surprises. No pressure.
Manufacturer Warranty Explained
Extended warranties are subject to:
- Brand chosen
- Filter installation
- System flush
- Correct registration
We install to manufacturer requirements to qualify you for maximum warranty wherever possible.
Why Homeowners Choose Us
Gas Safe registered engineers
Quick turnaround
Clean installations
London-based team
Honest pricing