Central Heating Installation London
Whether you're heating a property for the first time or replacing an outdated system entirely, a full central heating installation covers the boiler, every radiator, all pipework and your controls — fitted and certified in one job. From £4,000.
How Much Does Central Heating Installation Cost in London?
Full central heating installation in London starts from £4,000 for a smaller property, rising to £6,500–£8,500+ for a typical 3 to 4 bedroom house. This includes the boiler, radiators sized to each room, all pipework, heating controls, and your Gas Safe certificate. There's a £100 assessment visit to confirm your exact price, since the number of radiators, pipework routes, and whether you already have an existing system all affect the final cost.
| Property Size | Radiators (Typical) | Starting Price |
|---|---|---|
| Flat (1-2 bed) | 4-6 | From £4,000 |
| 2 bedroom house | 5-7 | From £4,500 |
| 3 bedroom house | 7-10 | From £6,500 |
| 4 bedroom house | 10-13 | From £8,500 |
| Installing from scratch (no existing system) | Varies | +£1,000 – £3,000 |
Installing central heating in a property with no existing system costs more than replacing one, because every pipe run has to be created new rather than reconnected. Not sure which category your job falls into? Message us on WhatsApp and we'll confirm honestly.
What's Included in a Full Central Heating Installation
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Boiler, correctly sized
A combi or system boiler matched to your bathroom count and hot water demand.
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Radiators for every room
Sized individually per room, including hallways and landings where needed.
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Full pipework
New pipe runs where none exist, or reconnection to existing pipework where suitable.
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Heating controls
A room thermostat or smart control, plus thermostatic radiator valves where appropriate.
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System flush & magnetic filter
Clears debris and protects the new system from London's hard water.
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Gas Safe certificate, same day
Issued before the engineer leaves, along with your boiler's warranty registration.
Costs & Pricing
How much does it cost to install central heating in London?
From £4,000 for a smaller property, rising to £6,500–£8,500+ for a typical 3 to 4 bedroom house, including the boiler, radiators, pipework and controls.
How much does a new central heating system cost in London?
A new system starts from £4,000 as a complete package. The exact price depends on property size, radiator count, and whether pipework is being run from scratch or reused.
How much does it cost to install central heating in a 3 bedroom house?
Typically from £6,500, including a new boiler, 7 to 10 radiators, full pipework and heating controls.
How much does central heating installation cost for a 2 bedroom house?
Typically from £4,500, including the boiler, 5 to 7 radiators, pipework and controls.
How much does central heating installation cost for a 4 bedroom house?
Typically from £8,500, reflecting the extra radiators, longer pipe runs and higher output boiler usually needed.
How much does it cost to install central heating from scratch?
Add roughly £1,000 to £3,000 on top of standard costs when there's no existing system, since every pipe run has to be created new rather than reconnected.
How much does it cost to install central heating in a flat?
Typically from £4,000, usually lower than a house due to fewer rooms and shorter pipe runs, though exact cost depends on radiator count and access.
How much does central heating installation labour cost in London?
Labour typically makes up £1,500 to £2,500 of the total cost, spread across 3 to 5 days depending on property size and pipework complexity.
What's Included & How Long It Takes
What is included in a central heating installation?
The boiler, radiators sized to each room, all necessary pipework, a thermostat or smart control, a system flush, and your Gas Safe certificate. Old radiator or pipework removal is included as standard.
How long does it take to install central heating?
Typically 3 to 5 days for an average 3 bedroom home, depending on how much pipework needs to be run and whether floors need lifting for access.
How long will a full central heating installation take?
Most homes take 3 to 5 working days. Larger properties, or homes with no existing system needing pipework run from scratch, can take up to a week.
Can a new boiler be installed with existing radiators?
Yes, in most cases. This is exactly what a standard boiler replacement involves — we only recommend replacing radiators if they're old, leaking, or undersized for the room.
Does central heating installation include radiators?
Yes, a full installation includes new radiators sized correctly for each room. Replacing only the boiler with existing radiators staying in place is priced differently.
Does central heating installation include pipework?
Yes. It includes all necessary pipework, whether that's reconnecting to existing pipes or running entirely new pipe runs for a property with no prior system.
Do I need to replace my radiators when installing a new boiler?
Not necessarily. Radiators in good condition and correctly sized can usually stay connected to a new boiler. Replacement is only needed if they're corroded, leaking, or too small.
Can It Be Installed in My Property?
Can you install central heating in a house with no existing heating?
Yes. This is a common job for homes previously using electric storage heaters or no heating at all. It takes longer since every pipe run is new, but it's achievable in almost all London properties.
Can central heating be installed in an old house?
Yes. Victorian and Edwardian properties across London are regularly fitted with modern central heating. Older solid-wall properties may need floor or wall pipework routed carefully, which we assess before quoting.
Can central heating be installed in a flat?
Yes, subject to building consent where required for shared pipework or flue positions. Leasehold flats sometimes need freeholder or management company approval before work starts.
Can central heating be installed without gas?
Yes. Electric central heating systems and air source heat pumps both provide central heating without a gas connection, though both typically cost more to install than gas where a supply already exists.
Choosing the Right System & Boiler
What type of central heating system is best for a London home?
For most London homes, a gas combi or system boiler paired with radiators is the most cost-effective and reliable option. Combi versus system depends mainly on your bathroom count, not the heating system itself.
What boiler is best for a central heating system?
A combi boiler suits one bathroom homes. Two or more bathrooms are better served by a system boiler with a cylinder, which handles simultaneous hot water demand more reliably.
How many radiators do I need for my house?
As a rule, every room needs a radiator, including hallways and landings in larger homes. A 3 bedroom house typically needs 7 to 10, a 2 bedroom home 5 to 7.
What is the difference between a combi boiler and a central heating system?
A combi boiler is one component of a central heating system. The full system also includes the radiators, pipework and controls the boiler powers — you can't have central heating without a boiler, but a boiler alone doesn't heat a home without the rest.
Is gas central heating cheaper than electric heating?
Generally yes, to run — gas costs less per kWh than electricity on most UK tariffs. Installation is more expensive upfront for gas where no supply exists, but running costs are usually lower long term.
Is gas central heating still worth installing in London?
Yes, for most London homes, particularly where a gas supply already exists. Alternatives like heat pumps carry higher upfront costs and work best with good property insulation.
What size boiler do I need for my home?
Boiler size depends mainly on bathroom count rather than bedrooms. A one bathroom home typically needs 24kW to 30kW. Use our free boiler size calculator for a personalised recommendation.
Regulations & Certificates
Does central heating installation require planning permission?
No. Standard installation is classed as permitted development in almost all cases, though listed buildings may have additional restrictions on visible pipework or flue positions.
Does a new central heating system need Building Regulations approval?
Yes, in a general sense — Gas Safe registered engineers self-certify compliance with Building Regulations as part of standard installation, which is why using a registered installer covers this automatically.
What certificates do I get after central heating installation?
A Gas Safe certificate confirming the installation meets current safety standards, plus manufacturer warranty registration for your boiler — both provided the day the work is completed.
Finding a Qualified Installer
How do I find a qualified central heating installer in London?
Check the engineer is Gas Safe registered using the free checker at gassaferegister.co.uk, ask for a fixed price in writing before booking, and look for independent reviews rather than only testimonials on the company's own website.
Other Boiler & Heating Options
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Get a Free Central Heating Assessment
Tell us your property size and current setup on WhatsApp and we'll confirm your exact price with a £100 assessment visit.
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