How much does a new boiler cost in the UK?

A like-for-like combi boiler swap typically costs £2,000–£3,500 installed. System or regular boiler installs run £2,500–£4,500. Full system replacements with new flue, controls and a power-flush can reach £4,500–£6,500.

How often should a UK boiler be serviced?

Annually, by a Gas Safe registered engineer. An annual service costs £80–£140 and is required to keep most manufacturers' warranties valid (often 7–12 years on new boilers).

Should I repair or replace my boiler?

If your boiler is over 10–12 years old, repairs exceed £400, or parts are no longer available, replacement is usually the better long-term call. Newer A-rated boilers also cut gas bills by 15–25%.

Do I need a Gas Safe engineer for any heating work?

Yes — any work on gas pipework, boilers, gas hobs or gas fires must legally be done by a Gas Safe registered engineer in the UK. Electric radiators, wet-system flushing and non-gas heating controls are exempt.

Is it worth upgrading to a heat pump?

Air-source heat pumps cost £8,000–£14,000 installed but qualify for the £7,500 Boiler Upgrade Scheme grant in England and Wales. Running costs are competitive with gas only if your home is well insulated.

Heating

Boiler installation, replacement, servicing and central heating system upgrade costs across the UK.

Planning a wider project? Cross-reference bathroom renovation pricing, kitchen renovation pricing and tradesperson day rates on the UK cost reference hub.

Boiler installation cost in the UK

Typical: £1,800–£4,500 · fully installed

UK boiler installation costs: £1,800–£4,500 typical. Combi, system and regular boiler pricing with labour, parts and hidden installation costs.

Boiler replacement cost in the UK

Typical: £1,900–£3,800 · like-for-like combi replacement

UK boiler replacement costs: typical £1,900–£3,800 like-for-like. Combi swap, system upgrade and hidden costs covered with reference tables.

Combi boiler installation cost in the UK

Typical: £1,900–£4,800 · typical UK combi install

UK combi boiler installation costs: £1,900–£4,800 typical. Like-for-like swaps, conventional-to-combi conversions and brand breakdowns.

Boiler service cost in the UK

Typical: £80–£140 · annual boiler service

UK boiler service costs: typical £80–£140 per service. Standard service, landlord gas safety check (CP12) and combined options.

Central heating installation cost in the UK

Typical: £3,500–£6,500 · full system, 2–3 bed home

UK central heating installation costs: £3,500–£6,500 typical for a full system. Boiler, radiators, pipework and hidden costs explained.

Radiator installation cost in the UK

Typical: £150–£500 · per radiator, supply & fit

UK radiator installation costs: £150–£500 per radiator typical. Like-for-like swap, new radiator, designer and vertical breakdown.

Boiler repair vs replacement cost in the UK

Typical: £150–£4,500 · repair vs replacement

Should you repair or replace your boiler in the UK? Repairs £150–£500; replacements £1,800–£4,500. Age, efficiency, parts availability and warranty considerations.

Cost to move a radiator in the UK

Typical: £200–£800 · per radiator

How much does it cost to move a radiator in the UK? £200–£450 for a simple move; £400–£800 if pipework needs extending. Labour, materials and hidden costs explained.

Boiler replacement cost

Typical: £1,500–£8,000 · Average combi boiler replacement (like-for-like)

Boiler replacement cost UK 2025. How much does a new boiler cost? Average prices for combi, system and heat-only boilers with fitting.

Underfloor heating cost

Typical: £50–£25,000 · Average electric UFH installation (living room)

Underfloor heating cost UK 2025. Electric vs wet system prices per m², installation costs and running costs compared.

Central heating installation cost

Typical: £300–£12,000 · Average first-time central heating system (3 bed)

Central heating installation cost UK 2025. How much does it cost to install central heating for the first time? Complete guide.

Loft insulation cost

Typical: £150–£6,000 · Average loft insulation cost (3 bed, top-up to 270mm)

Loft insulation cost UK 2025. How much does loft insulation cost? Average prices for mineral wool roll, blown fibre and spray foam.

Cavity wall insulation cost

Typical: £500–£3,500 · Average cavity wall insulation (semi-detached)

Cavity wall insulation cost UK 2025. How much does cavity wall insulation cost? Average prices, grants available, and how to check eligibility.

Solid wall insulation cost

Typical: £1,500–£30,000 · Average external wall insulation (semi-detached)

Solid wall insulation cost UK 2025. Internal and external wall insulation prices for Victorian and pre-1920 solid-walled homes.

Air conditioning installation cost

Typical: £300–£12,000 · Average single split AC system (one room)

Air conditioning installation cost UK 2025. How much does it cost to install air conditioning at home? Split system prices and running costs.

Frequently asked questions — Heating

How much does a new boiler cost in the UK?: A like-for-like combi boiler swap typically costs £2,000–£3,500 installed. System or regular boiler installs run £2,500–£4,500. Full system replacements with new flue, controls and a power-flush can reach £4,500–£6,500.
How often should a UK boiler be serviced?: Annually, by a Gas Safe registered engineer. An annual service costs £80–£140 and is required to keep most manufacturers' warranties valid (often 7–12 years on new boilers).
Should I repair or replace my boiler?: If your boiler is over 10–12 years old, repairs exceed £400, or parts are no longer available, replacement is usually the better long-term call. Newer A-rated boilers also cut gas bills by 15–25%.
Do I need a Gas Safe engineer for any heating work?: Yes — any work on gas pipework, boilers, gas hobs or gas fires must legally be done by a Gas Safe registered engineer in the UK. Electric radiators, wet-system flushing and non-gas heating controls are exempt.
Is it worth upgrading to a heat pump?: Air-source heat pumps cost £8,000–£14,000 installed but qualify for the £7,500 Boiler Upgrade Scheme grant in England and Wales. Running costs are competitive with gas only if your home is well insulated.