Heating & boiler cost guides

Heating and boiler work in the UK costs anywhere from £60–£90 for a gas safety certificate (CP12) to £6,000 for a complex boiler replacement — an annual boiler service sits at £70–£150 and most repairs at £150–£400. London and the South East typically run 20–30% above the rest of the UK. The guides below break down 2026 prices for every heating and boiler job, with London and rest-of-UK tables, what's included, and how to keep the bill down. All figures include VAT where applicable.

Heating & Boiler Prices At A Glance

Heating service Typical price (rest of UK) Guide
Boiler cover £8 – £20 per month Boiler cover cost
Boiler repair £150 – £400 per repair Boiler repair cost
Boiler replacement £1,800 – £3,000 (combi, supplied and fitted) Boiler replacement cost
Boiler service £70 – £150 per service Boiler service cost
Central heating service £70 – £150 per service Central heating service cost
Gas fire installation £300 – £800 fitting labour Gas fire installation cost
Gas safety certificate (CP12) £60 – £90 per certificate Gas safety certificate cost
Thermostat replacement £100 – £200 supplied and fitted Thermostat replacement cost
Underfloor heating £70 – £120 per m² installed Underfloor heating cost
Unvented cylinder service £100 – £180 per year Unvented cylinder service cost

Figures include VAT where applicable and reflect 2026 market rates. Every price depends on your system and postcode

Frequently Asked Questions

How much does a boiler service cost?

A boiler service typically costs £70 – £150 inc VAT, with £100 – £120 the most common spend across the UK. A full central heating service — covering the whole system rather than the boiler alone — sits in the same £70 – £150 band, and an unvented cylinder service runs £100 – £180 a year.

What is the most expensive heating job?

Boiler replacement: a new combi, supplied and fitted, costs £1,800 – £3,000, a system boiler runs £2,500 – £5,000, and complex installations reach £6,000. Whole-house underfloor heating at £70 – £120 per m² installed also adds up quickly across larger floors.

Why are heating prices higher in London?

Gas engineers' labour rates, travel and parking push London and South East prices roughly 20–30% above the rest of the UK — a boiler repair moves from £150 – £400 to £200 – £500 in the capital.

Does boiler work have to be done by a Gas Safe engineer?

Yes — any work on a gas boiler, fire or pipework is illegal unless the engineer is on the Gas Safe Register, so always check the ID card before work starts. Landlords must also hold a current CP12 gas safety certificate, at £60 – £90 for a boiler plus one appliance, renewed annually.

Heating & Boiler Services Prices UK [2026]

As a member of the Fantastic club, you can get £30 OFF for 10 different services within 1 year.

AppointmentsMonday - Saturday
8am - 4pm
PricesFantastic Club priceStandard price
Boiler Service£98£128
Boiler Service Plus£105£135
Landlord Gas Cert.(up to 2 appliances)£91£121
Landlord Gas Cert.(3 to 4 appliances)£94£124
Boiler Service & Landlord Gas Certificate£186£216

Join the Fantastic Club and get:

  • £300 in credits
  • Preferential member rates
  • Domestic cleaning from £18/h
  • Plant a tree
  • Priority booking & case handling

T&C and Minimum Charges apply. When we calculate the price, we also take into consideration the area's dimensions and the time of the appointment. All prices and deals are valid for areas within M25. Deals cannot be combined with any other deals and promotions. Prices are subject to availability. Congestion charges are excluded (when applicable).

All prices are indicative, market-researched 2026 ranges — verify against Fantastic Services' live pricing before booking.
Domestic clients 020 3404 3444
Business clients 020 3746 1062

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