What does a new boiler / central heating cost in London?
In London: £2,300 to £4,400 at mid-range, including 20% VAT, against £1,800 to £3,500 nationally. Budget starts around £1,900, premium runs to £6,600. Set your finish level and region below, no email required.
New boiler / central heating, mid-range, London
£2,300 to £4,400
Including 20% VAT. An indication, not a quote: prices vary per trade and property.
Take it further
Prices include 20% VAT. New builds and some energy-saving works can qualify for 0% or reduced VAT; ask your installer.
Got quotes in already? Check if they are fair. Want to know when the money leaves? See the phase-by-phase plan.
What drives the price
- Like-for-like or not: a combi swap in the same spot is the cheap end.
- System changes: moving the boiler or switching type adds pipework and labour.
- Radiators and controls: often quoted separately, so ask.
- The brand and warranty length move the price more than most expect.
All figures come from the same validated 2026 price data as the calculator above (sources: Checkatrade, MyJobQuote and comparable national 2026 cost guides, checked August 2026; see how we price), so this page and your estimate can never disagree. Outside London? See the national guide, or compare every region in the regional overview. How to pay for it (remortgage, loan or savings) is its own guide: paying for a renovation. Planning an extension or loft? Check permitted development first.
Frequently asked questions
Should I repair or replace an old boiler?
Past roughly 10 to 12 years, repeated repairs on an inefficient boiler rarely beat replacement: a modern condensing boiler saves on gas every month and comes with a fresh warranty. One expensive repair on an old unit is usually the signal.
Do these prices include VAT?
Yes, all ranges include 20% VAT. New builds and some energy-saving works can qualify for 0% or reduced VAT; ask your installer whether your project applies.
Why is London so much more expensive?
Labour is the driver: London trades charge roughly 25% above the national average, and parking, access and waste logistics add friction. Nationally this project runs £1,800 to £3,500; the calculator switches region in one click.
How accurate is this range?
It is a guide range from national 2026 cost guides, adjusted for finish level and region. Real quotes vary per trade, property and specification; treat it as a starting point, budget 10 to 15 percent contingency, and always get at least three itemised quotes.