Price Guide

How Much Does a Boiler & Gas Engineer Really Cost?

Compare prices for 14 services across 342 UK locations. Data-driven pricing updated for .

14 services priced 342 cities covered Updated

Adjust prices for your property size

Adjusts prices for: Central Heating Powerflush, Full Central Heating System

National pricing

Boiler & Gas Engineer Prices

National average prices. Select a city below for local pricing.

All prices include materials and labour unless stated otherwise. Prices verified 2026

New Combi Boiler Installation

Low

£2,000

Average

£3,000

High

£4,500

1 day

More details

Removing your old boiler and installing a new combi boiler in the same location. A combi heats water on demand so you do not need a separate hot water tank. Price includes cleaning out the pipes and testing everything works properly.

~57% labour, ~43% materials

What affects the price

  • Boiler brand (Worcester Bosch, Vaillant, Baxi etc.)
  • Complexity of pipework changes
  • Whether the flue route needs altering
  • System flush and filter requirements

New System Boiler Installation

Low

£1,700

Average

£3,300

High

£5,000

1-2 days

More details

Installing a new system boiler with a hot water cylinder (tank). Unlike a combi, a system boiler stores hot water so it can supply multiple taps at once — better for larger homes. Price includes cleaning the pipes, new controls, and testing everything works.

~52% labour, ~48% materials

What affects the price

  • Cylinder size and brand
  • Pipework modifications needed
  • Location of boiler and cylinder
  • Whether existing radiators need upgrading

Boiler Relocation

Low

£500

Average

£850

High

£1,500

1 day

More details

Moving an existing boiler to a new location within the property. Price is on top of any new boiler cost if replacing at the same time.

~68% labour, ~32% materials

What affects the price

  • Distance from original location
  • New pipework and flue route required
  • Electrical supply relocation
  • Access difficulty

Annual Boiler Service

Low

£60

Average

£80

High

£100

45-60 minutes

More details

A yearly check-up for your gas boiler. The engineer inspects the gas pressure, exhaust pipe, controls, and safety devices. Keeps your boiler running safely and efficiently, and is usually required to keep your warranty valid.

~94% labour, ~6% materials

What affects the price

  • Boiler type and age
  • Accessibility of the boiler
  • Whether parts need replacing
  • Your location

Gas Safety Certificate (CP12)

Low

£60

Average

£80

High

£110

30-45 minutes

More details

A gas safety inspection and certificate, legally required every year for all rented properties. The engineer checks every gas appliance in the home (boiler, cooker, fire) and issues a certificate to confirm they are safe.

What affects the price

  • Number of gas appliances
  • Accessibility of appliances
  • Whether combined with a boiler service
  • Your location

Boiler Repair

Low

£100

Average

£200

High

£500

1-3 hours

More details

Diagnosing and fixing a fault with your gas boiler. Common problems include broken internal valves, faulty circuit boards, failed fans or pumps, and ignition issues. The engineer will find what is wrong and replace the faulty part.

~33% labour, ~67% materials

What affects the price

  • Type of fault
  • Parts required
  • Age and model of boiler
  • Whether a diagnostic visit is needed first

Central Heating Powerflush

Low

£350

Average

£475

High

£650

4-6 hours

More details

A deep clean of your entire central heating system using a powerful flushing machine to push out sludge, rust, and debris that builds up inside radiators and pipes over time. This improves heating performance and helps your boiler last longer.

~87% labour, ~13% materials

What affects the price

  • Number of radiators
  • Severity of sludge buildup
  • System type (combi, system, gravity)
  • Whether a magnetic filter is fitted after

Radiator Installation

Low

£150

Average

£300

High

£500

2-3 hours

More details

Installing a new radiator including pipework connection to the existing central heating system. Price per radiator.

~58% labour, ~42% materials

What affects the price

  • Radiator size and type
  • Distance from existing pipework
  • Whether floorboards need lifting
  • Type of valves chosen (TRVs, smart valves)

Full Central Heating System

Low

£3,500

Average

£5,000

High

£8,000

3-5 days

More details

Complete central heating installation including new boiler, radiators, pipework, controls and thermostat. For a 3-bed house.

~50% labour, ~50% materials

What affects the price

  • Number of radiators
  • Boiler type and brand
  • Property size and layout
  • Underfloor heating vs radiators

Smart Thermostat Installation

Low

£150

Average

£220

High

£350

1-2 hours

More details

Installing a smart thermostat (Nest, Hive, Tado etc.) including wiring and connecting to your existing boiler and Wi-Fi.

~20% labour, ~80% materials

What affects the price

  • Thermostat brand and model
  • Compatibility with existing boiler
  • Whether additional wiring is needed
  • Number of zones

Gas Cooker Installation

Low

£60

Average

£90

High

£140

30-60 minutes

More details

Connecting a new gas cooker or range to an existing gas supply point. Must be done by a Gas Safe registered engineer.

~78% labour, ~22% materials

What affects the price

  • Whether an existing gas point is available
  • Type of cooker (freestanding, range, built-in)
  • Bayonet fitting condition
  • Accessibility

Gas Hob Installation

Low

£60

Average

£80

High

£120

30-60 minutes

More details

Installing a gas hob into a kitchen worktop and connecting it to the gas supply. The engineer will test all connections for leaks before finishing. Must be done by a Gas Safe registered engineer.

~81% labour, ~19% materials

What affects the price

  • Whether worktop needs cutting
  • Distance from gas supply
  • Type of hob
  • Existing connections

Gas Fire Installation

Low

£400

Average

£700

High

£1,200

3-5 hours

More details

Installing a new gas fire or replacing an existing one. Includes connecting to gas supply and fitting the flue if needed.

~43% labour, ~57% materials

What affects the price

  • Type of fire (inset, wall-mounted, freestanding)
  • Whether a new flue is needed
  • Gas supply accessibility
  • Fireplace surround work

Magnetic Filter Installation

Low

£100

Average

£170

High

£250

1 hour

More details

Fitting a magnetic filter to your central heating pipes that catches rust and sludge before it reaches your boiler. This protects the boiler from damage and keeps your heating running efficiently. Usually fitted near the boiler and takes about an hour.

~47% labour, ~53% materials

What affects the price

  • Filter brand (MagnaClean, Fernox, Spirotech)
  • Location and accessibility of pipework
  • Pipe size
  • Whether fitted during a boiler install (cheaper)

Popular locations

Boiler & Gas Engineering Costs by City

London

£2,485–£5,595

Birmingham

£1,865–£4,200

Leeds

£1,945–£4,375

Glasgow

£2,100–£4,720

Sheffield

£1,970–£4,435

Manchester

£1,955–£4,395

Bradford

£1,750–£3,940

Edinburgh

£2,285–£5,140

Liverpool

£1,975–£4,445

Bristol

£2,150–£4,840

Coventry

£1,915–£4,310

Leicester

£1,710–£3,850

Local pricing

Find Boiler & Gas Engineer Costs in Your City

Browse all 342 cities for local boiler & gas engineer pricing.

Barking and Dagenham Barnet Bexley London
Brighton Milton Keynes Reading Southampton
Bournemouth Bristol Gloucester Plymouth
Colchester Luton Norwich Peterborough
Birmingham Coventry Stoke-on-Trent Wolverhampton
Derby Leicester Northampton Nottingham
Bradford Leeds Sheffield York
Bolton Liverpool Manchester Warrington
County Durham Middlesbrough Newcastle upon Tyne Sunderland
Blaenau Gwent Bridgend Cardiff Swansea
Aberdeen Dundee Edinburgh Glasgow
Belfast

Regional comparison

New Combi Boiler Installation by City

Average cost of new combi boiler installation across key UK cities.

London
+24% £3,730
Manchester
-2% £2,930
Birmingham
-7% £2,800
Glasgow
+5% £3,145
Bristol
+7% £3,225
Leeds
-3% £2,915
Cardiff
-2% £2,950
Belfast
-13% £2,610

Overview

What Does a Boiler & Gas Engineer Do?

A boiler & gas engineer provides professional services covering boiler installation, servicing, repairs and gas safety work. They handle everything from routine maintenance and inspections to full installations and emergency repairs. Whether you need a small repair or a major project, hiring a qualified boiler & gas engineer ensures the work is done safely, to code, and to a professional standard.

You should hire a boiler & gas engineer whenever you need work that requires specialist skills, tools, or qualifications. Many types of boiler & gas engineer work are regulated and must be carried out by a certified professional. Attempting DIY on regulated work can be dangerous, void your insurance, and create costly problems down the line.

Pricing for boiler & gas engineer services depends on the complexity of what you need, the options chosen, and where you live in the UK. Simpler services sit at the lower end of the scale, while more involved or premium options will be significantly more expensive. The prices on this page give you a realistic range for each type of service so you know what to expect before getting quotes.

When hiring a boiler & gas engineer, always get at least three quotes from different tradespeople. Read recent reviews and ask for references. Always check qualifications, insurance and recent reviews. A reputable boiler & gas engineer will be happy to provide a detailed breakdown of costs and explain exactly what is included in their quote.

Related services

Related Services

Services often needed alongside a boiler & gas engineer.

Plumber UK price guide £50–£200 Electrician UK price guide £4,000–£8,000 Heat Pump Installation UK price guide £8,000–£15,000 Drain Services UK price guide £60–£250 Damp Proofing UK price guide £250–£1,000 Handyman UK price guide £40–£120 Roofing UK price guide £80–£275 Builder UK price guide £30,000–£80,000

Common questions

Frequently Asked Questions

Common questions about boiler & gas engineer costs in the UK.

Do I need a Gas Safe registered engineer?
Yes. By law, only Gas Safe registered engineers can work on gas appliances in the UK. This includes boiler installations, repairs, servicing and gas safety checks. Always ask to see their Gas Safe ID card and check it on the Gas Safe Register website.
How often should I get my boiler serviced?
You should get your boiler serviced every 12 months. Annual servicing keeps your manufacturer warranty valid, ensures the boiler runs safely and efficiently, and catches small problems before they become expensive repairs. Landlords are legally required to have an annual gas safety check.
What is the difference between a combi, system and regular boiler?
A combi boiler heats water on demand with no hot water tank, making it ideal for smaller homes. A system boiler uses a hot water cylinder and suits larger homes with multiple bathrooms. A regular (conventional) boiler also needs a cold water tank in the loft and is found in older heating systems.
How long does a new boiler last?
A modern condensing boiler typically lasts 10-15 years with regular servicing. Most manufacturers offer 5-10 year warranties on new installations. If your boiler is over 15 years old or breaking down frequently, replacing it is usually more cost-effective than ongoing repairs.
How long does a boiler installation take?
A straightforward like-for-like combi boiler swap takes around 4-6 hours and is usually done in one day. If the boiler is being relocated, or you are switching from a regular boiler to a combi (which means removing the hot water tank), allow 1-2 days.
What is a powerflush and do I need one with a new boiler?
A powerflush uses a machine to pump cleaning chemicals through your radiators and pipes to remove sludge, rust, and debris that builds up over years. Most engineers recommend one when fitting a new boiler to protect it from damage. Skipping a flush on a dirty system can void your boiler warranty.
How do I check if my gas engineer is Gas Safe registered?
Ask to see their Gas Safe ID card, which has a photo and licence number. You can verify this on the Gas Safe Register website or by calling 0800 408 5500. The card also shows which types of gas work they are qualified to carry out — not all engineers are qualified for all appliance types.
Is it worth getting a boiler cover plan?
Boiler cover plans typically cost £10-£25 per month and include an annual service plus emergency repair callouts. They can be good value for older boilers outside their warranty period, but for a new boiler under a long manufacturer warranty, you may only need a standalone annual service at £60-£80.
Can I get a grant towards a new boiler in the UK?
The ECO4 scheme and the Great British Insulation Scheme offer free or subsidised boiler replacements for households on qualifying benefits or with low energy efficiency ratings. Contact your energy supplier or check the government website to see if you are eligible. The Boiler Upgrade Scheme covers heat pumps but not gas boilers.
How much does a boiler & gas engineer cost in the UK?
The most common boiler & gas engineer job, new combi boiler installation, costs between £2,000 and £4,500 nationally, with an average of £3,000. Prices vary depending on the scope of work, materials used, and your location within the UK.
What affects boiler & gas engineer prices?
The main factors are the complexity and scope of what you need, the options and products chosen, and your location. London and the South East are typically 15-35% more expensive than northern regions. Getting multiple quotes is the best way to ensure a fair price.
How do I find a reliable boiler & gas engineer?
Get at least three quotes from different tradespeople, check recent reviews and references, and ask for a detailed written quote that breaks down all costs before committing. Always check qualifications, insurance and recent reviews.
Do boiler & gas engineer prices vary by location?
Yes, significantly. London is the most expensive area, with prices typically 20-35% above the national average. The South East is also above average. Northern England, Wales, Scotland and Northern Ireland tend to be 5-15% below the national average. Our city pages show exact local pricing for 342 UK locations.
Do the prices shown include materials?
The prices on this page include all typical costs. However, when getting real quotes, always confirm what is and isn't included. Some tradespeople break out costs separately, while others give an all-in price. Ask for a detailed breakdown before agreeing to any work.
When is the best time to hire a boiler & gas engineer?
Demand for boiler & gas engineer services tends to peak in autumn and winter, which can mean longer wait times and higher prices. If your job isn't urgent, booking during spring or summer may get you a better rate and faster availability. Emergency work will always cost more regardless of the time of year.