Central Heating Installation Cost & Prices 2021

Central heating has always traditionally been associated with massive expense, but prices have come down lately and boilers have become more efficient, easier to maintain and cheaper to purchase. 

Replacing or upgrading a central heating system comes with many benefits, namely massive increases in energy efficiency and reduced running costs.

In the long term, this can make new central heating a profitable option even despite the installation costs. 

This article will cover what you can expect to pay for central heating, factors that can affect the cost and other common questions around central heating.

Average Central Heating Costs

The average cost of gas central heating varies primarily with the size of the property. 

Whilst the price of boilers typically hit a ceiling at around £2,000 at the very most, the price of pipework and radiators scales with the demands of the heating system. 

Larger systems typically require system or conventional boilers, since combi boilers are typically unsuitable for homes with larger water demands. This will also increase installation costs as conventional and system boilers require additional cylinders. 

Radiators cost around £150 each whereas pipework costs between £800 to £1200 per project with installation. 

By gathering quotes from 6 primary sources and 7 secondary sources, we found these average total prices for gas central heating in different sized properties. 

Prices include all parts and labour. Labour costs will be higher in older homes and homes with poor access. Installation in new builds will be some 10% or 20% lower because the walls won’t need to be stripped and old components won’t need to be removed and thrown away. 

Property Size1-Bed Bungalow2-Bed House3-Bed House4-Bed House
Boiler Size24kw24kw28kw33kw
Number of Radiators56912
Radiator Cost£1,000£1,150£1,700£2,800
Boiler Cost£750£1,000£1,000£1,500
Pipework & Cylinder Cost£500£750£1,100£1,300
Total Cost (+ Labour)£3,000£3,800£4,500£5,500+

Types of Central Heating

The costs of central heating vary in many ways, firstly with the type of central heating (oil, gas or electric) and then with the boiler system and components used (combi, gravity or standard systems and high-pressure systems). 

Electric heating is the most costly of all central heating whereas oil is only typically necessary in homes that aren’t on the mains gas grid. 

In short, the vast majority of central heating in the UK is gas-powered, which is what we’ll be covering here. 

However, the prices for both electric heating systems and oil heating systems will be roughly equivalent to the prices in this article.

Types of Boiler System

There are 3 main types of boilers used in gas central heating systems:

Combi boilers

Combi boilers are one of the newer types of boilers. They heat water directly from the cold water mains supply, so there is no need for a separate water tank – hence the ‘combi’ of the boiler with the water tank in one unit. They’re usually only suitable for properties with low hot water demands, e.g. one bathroom. 

  • Radiator heating and hot water from the same unit
  • Heats water quickly and instantly 
  • Best suited for houses/flats with one bathroom 
  • Compact and efficient 

Standard/Traditional Boilers

Standard/conventional/traditional boiler systems are still the most popular option in most semi-detached and detached houses in the UK. 

They feature a boiler and separate hot water tank, which usually sits in the airing cupboard. A feed boiler also sits in the attic, supplying cold water to the hot water tank. The water tank will maintain a hot water supply sufficient for multiple bathrooms, which is their main advantage. 

  • More components than combi boilers 
  • Much better performance for homes with 2 or more bathrooms
  • Fitted in most semi-detached and detached homes already 
  • Usually good pressure (highest upstairs)

Pressured/System Boilers

Similar to combi boilers, pressured system boilers heat water directly from the mains. They use a pressured water tank that can pass more hot water through multiple taps and radiators. 

Somewhat of a hybrid system for larger properties and usually the most expensive option. 

  • High-pressure water to multiple bathrooms and taps
  • Heats water directly 
  • The modern alternative to traditional boilers in bigger properties 
  • Expensive to install 

Leading Boiler Brands

There are 5 leading boiler brands in the UK right now; Baxi, Ideal, Valliant, Viessmann and Worcester Bosch.

All of these manufacturers provide combi, standard and pressured system boilers. 

Prices for boilers alone tend to vary from as little as £500 (for small one-bed flats) to £2000+ for large detached houses. 

Fitting New Central Heating Options

When you’re installing new central heating, you’ll typically have 3 options:

  • Installing new radiators 
  • Installing a new boiler
  • Installing an entirely new system, boilers, radiators, tanks and pipework 

New installations and full central heating upgrades are usually only necessary in new builds or upgrades to old houses built before the 1970s or so.

It won’t always be necessary to replace an entire system, it depends on the quality of existing components. For example, old copper piping can corrode or suffer from pinhole leaks.

This can vastly decrease the efficiency of a system – it wouldn’t make sense to replace the boiler without replacing poor-quality piping. 

Similarly, radiators also decline in functionality and efficiency, Best Heating says that new radiators are up to 50% more efficient than their year-2000 equivalents. 

Upgrading an entire system is often more cost-effective than upgrading the boiler, radiators or pipework alone, and will result in greater net improvements in heating efficiency.  

The Central Heating Installation Process

Choose System and Components

In the case of replacing an existing system, it’ll be relatively easy for the central heating engineer to match your old boiler’s power output with a newer A-rated boiler.

It’s likely that new radiators will be fitted in place of older ones, so you’ll need the same amount as you have already.

In the case of replacing conventional gas central heating systems, your engineer will discuss whether or not you need new tanks and/or piping.

New radiators and piping could vastly increase the efficiency of your new system, so are always worth considering if you’re replacing the boiler anyway. It probably won’t be necessary for newer builds built since the late 90s or 2000s. 

Install Boiler and Radiators

The new radiators are typically installed first. The old system will be safely removed. New pipes are laid from the radiators to the new boiler. 

The new boiler is typically fitted near to an outside wall so the boiler flue (exhaust) can be easily directed outside. If you’re moving your boiler, the engineer will need to drill a new flue. 

The thermostat will be installed and connected to the boiler. 

Switch on and Balance System 

The system will be filled with water allowing each radiator to vent through. The boiler will then be switched on and the engineer will balance the system using the radiator valves. 

Why Install New Central Heating?

The main reason for upgrading a central heating system is to take advantage of new A-rated gas boilers. 

A-rated gas boilers are as much as 95% efficient. Boilers extend through A to the lowest category, G, which are less than 70% efficient. 

An A-rated boiler means that for every £1 you spend on your heating, as little as 10p is lost. With a G-rated boiler, contrastingly, you will lose as much as 30p for every £1 heating. 

Since 2008, newly fitted boilers must be at least 88% efficient. 

Over time, these savings have a huge cumulative effect – new heating systems end up paying for themselves. 

Other benefits of fitting new central heating include increasing hot water pressure and heating times, as well as improving the actual heating of your home. 

Newer radiators are also more efficient than older ones and will radiate more heat at lower settings.

Choosing a Central Heating Installer

If you’re looking for electric or oil central heating systems then bear the following in mind:

  • Gas central heating installers should be registered with Gas Safe.
  • Oil central heating systems should preferably be installed by a member of OFTEC (Oil Firing Technicians Association). Oil central heating systems work in broadly the same way as gas central heating but oil combustion heats the water instead of gas.
  • Electric boilers should be installed by someone with experience in fitting electric boilers. Electric boilers work in broadly the same way as gas boilers but use electricity to power the heating and not gas.

Get Prices on Installing Central Heating Near You

We’ve done our best to give you a good idea of what you can expect to pay for central heating.

However, our guides are not a substitute for a fixed quote specifically for you.

We work with all the best central heating engineers ready to price your job. Get free, no-obligation quotes in your local area and compare prices using the form below.

  • Compare Multiple Quotes & Save Up to 40%
  • Certified & Vetted Engineers
  • Free & No Obligation
  • Local Central Heating Engineers Near You

How much will your project cost?

X