How Much Does an LPG Boiler Installation Cost?

The average cost of an LPG boiler is £3,300 to £5,300 with installation. Installed commercial LPG boilers can cost over £20,000. This comprehensive guide covers all you need to know about LPG boiler costs, including supply, operating, maintenance, and installation costs.

Because the cheapest boiler deal is rarely the best, we highlight 5 top-regarded LPG boilers and their average costs, including installation and a tank:

• Vaillant ecoTEC 28 –  £3,500
• Ideal Logic Max 30 –  £3,200
• Viessmann Vitodens 100-W –  £3,550
• Viessmann Vitodens 200-W –  £4,350
• Worcester Bosch Greenstar 8000 Life –  £3,800

What is the Average Cost of an LPG Boiler?

The average cost of an LPG boiler, including installation and a tank, is £3,300 to £5,300. Commercial LPG boilers may cost over £20,000, with installation and tank.

Your boiler’s size (in kW), your location, and installation difficulty all influence the price you pay. An LPG (Liquefied Petroleum Gas) heating system has an additional expense item – an LPG tank to store the gas. Here are the average tank costs:

• Above-ground tank: £300 – £600
• Underground tank: £900 – £1,400
• Commercial tanks: £600 – £5,000+

The good news is you don’t need to buy the tank. You can rent it from your fuel provider. Rental cost indications are:

• Above-ground tank: £75 – £120
• Underground tank: £100 – £150
• Commercial tanks: £500 – £1,500

Residential tanks are typically sized from 1,400 to 2,500 litres. Most households won’t use more than 2,500 litres a year. Commercial LPG tanks exceed 4,500 litres and big companies often use several tanks in combination.

A wide selection of LPG boiler models are available at different price points, from affordable units that deliver basic heating to premium models featuring the latest smart technology. 

Let’s look at the most popular types of LPG boilers in the UK.

LPG conventional boiler

Conventional (or heat-only) boilers comprise:

• LPG boiler unit
• Hot water cylinder
• Cold water tank

Unlike natural gas boilers, LPG systems don’t receive gas from a mains supply. Rather LPG fuel is stored in the external tank on the property and piped indoors.

LPG system boiler

System boilers are similar to conventional boilers, except they connect directly to the water mains. This removes the need for a cold water tank. A hot water tank is integrated into the system to store heated water.

LPG combi boiler

A combi boiler heats your water on demand, directly from the mains supply, to deliver hot water to your taps and central heating system.

A hybrid-style combi boiler that incorporates a water storage cylinder is also available. This version is around double the price of a standard combi and slightly more expensive than conventional LPG and system boilers. Combi boilers are ideal for apartments and smaller homes.

Average costs of LPG boilers

Assuming you buy your LPG tank, here are the average costs for residential LPG boilers.

Boiler Type	Boiler Unit Cost	Average Installation Cost	LPG Tank – Above Ground	LPG Tank -Below Ground	Ave. Total – Above Ground Tank	Ave. Total  – Below Ground Tank
LPG Heat Only	£600- £4,000	£1,400	£450	£1,100	£4,150	£4.800
LPG System	£600 – £3,900	£1,300	£450	£1,100	£4,000	£4,650
LPG Combi	£650 – £3,000	£1,100	£450	£1,100	£3,375	£4,025
LPG Combi – with Tank	£2,000 – £4,000	£1,300	£450	£1,100	£4.750	£5,400

Note that these figures are averages as every situation differs. A top-end boiler with a large underground tank will be pricier than the average due to higher installation and tank costs.

Here are the average costs for commercial LPG boilers:

Business Size	Boiler Unit Cost	Average Installation Cost	LPG Tank – Above Ground	LPG Tank -Below Ground	Ave. Total  – Above Ground Tank	Ave. Total – Below Ground Tank
Small	£800 – £2,000	£1,300	£500	£1,200	£4,400	£5,100
Medium	£1,500 – £7,000	£3,500	£1,200	£2,600	£8,850	£10,000+
Large	£7,000 – £10,000+	£7,000+	£3,000	£6,000+	£18,500	£20,000+

For a price comparison of LPG alternatives, see our guides on:

• Electric Boiler Installation Cost 
• How Much Does a New Oil Boiler Cost?

How Much Does It Cost to Install An LPG Boiler?

The average price range for fitting a residential LPG boiler is £800 to £2,100. The average large commercial boiler installation cost is over £10,000.

It’s important to understand the factors that affect boiler fitting costs.

What factors influence the costs of installing an LPG boiler?

Storage tank

Your storage tank setup significantly affects the cost. Choices around buying or renting, above ground or underground, and tank size all factor into the final bill.

Complexity of the installation

Replacing an LPG unit with a new LPG boiler is usually straightforward, so it can be completed in under a day and might cost less than £900. 

More complex jobs are more expensive. For example, replacing a conventional LPG boiler with a combi LPG boiler typically involves removing tanks and pipework and reconfiguring the system.  

Location of the boiler

The cost will be higher if the boiler is installed in a hard-to-reach location or if additional pipework or wiring is needed to access the space.

Similarly, the cost of moving a boiler to a more practical location can add several hundred pounds.

Power flushing

Before installing a new boiler, it’s advisable to power flush your heating system to clear accumulated dirt and sludge. Power flushing can cost over £300, so be sure to check with your installer if this expense is included in their quote.

Labour cost

Labour rates vary by region and the installer’s experience and reputation. Expect higher rates in urban areas like London and when hiring a busy installation company.

Boiler model

More sophisticated boiler models may require a longer and costlier installation process. Configuring and testing WiFi-enabled and other smart controls add to the installation cost. 

Size of the installation

A big installation to meet heavy commercial heating demands can get pricey. Large commercial setups often include several tanks and boilers.

How Much Does An LPG Boiler Cost to Run?

Residential LPG operating costs vary from £1,000 to £2,500+ a year. A large business will likely spend over £10,000 annually.

Factors that determine your boiler’s operating cost include:

• The price of LPG fuel
• Boiler efficiency – LPG is a relatively efficient fuel
• Property size
• Property insulation
• Central heating usage patterns

The current price of LPG is around 13p per kWh.

• An average smaller home with 6-8 radiators consumes around 11,000 kWh of fuel annually, which costs £ 1,430 to run.
• An average larger home with 10+ radiators and a section of underfloor heating consumes around 18,000 kWh a year, resulting in a running cost of £2,340.
• Large companies can consume 100,000 kWh, equating to an operating bill of over £10,000.

LPG boilers are cheaper to run than electric boilers but more expensive than gas and oil. 

• The latest average gas price (domestic) is 5.48p per kWh, making gas boilers at least 50% cheaper than LPG systems. 
• Oil is currently around a third cheaper than LPG but oil boilers are more expensive to buy and less efficient.

Modern LPG boilers are classified as condensing boilers and must, by law, be at least 92% energy efficient. This makes them way more efficient than many older gas and boilers, which waste up to half their energy. 

While efficient, LPG boilers burn fossil fuels, making them not the most eco-friendly option. For green boiler options, consider electric boilers (powered by renewable energy like solar) and biomass boilers.

From a cost perspective, LPG units are the most viable because electricity and solar panels are expensive, and the average biomass boiler installation cost is over double that of LPG systems.

How Much Does LPG Boiler Maintenance Cost?

Maintaining your LPG boiler costs an average of £65 – £120 a year. Maintenance for companies ranges from £120 – £500, depending on the size of the LPG heating system. Upkeep expenses typically increase as the boiler ages beyond 10-12 years.

An LPG boiler is fairly complex and must be regularly checked and well-maintained. Like natural gas, liquefied petroleum gas can create explosive mixtures in the air and pose risks of fire or carbon monoxide poisoning. It must be properly stored and handled, and the boiler system must be monitored for potential gas leaks.

A Gas Safe registered engineer should service your boiler annually. Besides ensuring safety and optimal functioning, an annual boiler service is usually a condition of the manufacturer’s warranty.

Remember that renting your tank incurs an annual hiring cost of anywhere from £75 for homes to over £1,000 for businesses.

Get An LPG Boiler Quote Today

If you’re considering installing an LPG boiler, contact Eco Happy today. Complete our quick online form for a free, no-obligation boiler installation quote, and our professional team will be in touch.

We’ll help you choose a quality, affordable product and promise to have your new LPG boiler installed to the highest safety and quality standards.

FAQs

What are the downsides of an LPG boiler?

LPG boilers are usually costlier to run than natural gas boilers due to more expensive fuel and price fluctuations. They also require a storage tank, which takes up space and adds to installation or rental costs. Additionally, LPG deliveries must be managed to ensure you don’t run out of fuel.

Can I fit my own LPG boiler?

Unless you are a Gas Safe registered engineer, you are not legally allowed to install your own LPG boiler. Only Gas Safe engineers can fit and maintain gas boilers. LPG is not quite as dangerous as natural gas, but it is still hazardous and potentially explosive. 

Generally, you shouldn’t consider installing a boiler yourself – whatever boiler type – unless you are properly qualified.

Are LPG boilers being banned in the UK? 

LPG boilers are not being banned in the UK. However, from 2025, gas boilers will be phased out in new builds as the government encourages heat pumps and renewable energy systems. Even if future regulations favour low-carbon heating solutions, expect LPG boilers to be part of the next decade’s heating landscape.

How long does it take to install an LPG boiler?

A straightforward LPG boiler installation typically takes less than a day. If the installation is more complex, involving an underground tank or additional wiring or pipework, it may take up to two days.

Final Thoughts

LPG boilers are a popular alternative to gas boilers for properties not connected to the gas mains. They are more energy efficient than oil boilers and cheaper to run than electric boilers.

LPG boilers are not part of the 2050 Net Zero future, but they will be around for many years. Priced from £3,500 to £5,500, including the tank and installation, they are not significantly more expensive than their alternatives.