What does a new boiler / central heating cost?
As a national mid-range guide: £1,800 to £3,500, including 20% VAT. Budget finishes start around £1,500, premium runs to £5,300, and London adds a quarter. Set your finish level and region below for an instant estimate, no email required.
What the sources say
MyJobQuote, Boiler Installation Cost Guide: £1,200 to £4,000
gas combi supply and installation; mid-range quotes £1,800-2,800, average £2,400. The guide does not state its VAT treatment. Guide dated 2026-07, opened and checked 2026-08-26.
Checkatrade, New Boiler Costs: £3,000 to £15,000
total including installation and typical extras, across boiler types; average gas combi total about £3,000. The guide does not state its VAT treatment. Guide dated 2026-03, opened and checked 2026-08-26.
The national range at the top of this page is chosen inside the spread these guides publish, converted to include 20% VAT where a guide states its prices exclude it. Where guides disagree, both figures stay visible above so you can judge for yourself.
New boiler / central heating, mid-range, Midlands
£1,800 to £3,500
Including 20% VAT. An indication, not a quote: prices vary per trade and property.
Take it further
Nothing here is saved unless you ask. With a free account you can keep this estimate and come back to it later.
Prices include 20% VAT. New builds and some energy-saving works can qualify for 0% or reduced VAT; ask your installer.
On top of whatever you agree with a builder, set aside a contingency of 10 to 15% for the unforeseen: standard guidance for renovation work, with room to sit higher in an older property. How much contingency you need explains the guidance.
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, built on the sources listed higher up on this page, each opened and checked on 26 August 2026 (see how we price), so this page and your estimate can never disagree. Planning this in London? See the London 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. Replacing the boiler is the natural moment to weigh a heat pump: run the two-question heat pump check with your own gas use.
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.
What should I do first?
Three steps, in this order. First, turn the guide range above into your own number: the calculator on this page adjusts for size, finish level and region in under a minute, free and without email. Second, if the layout matters, bathrooms and kitchens especially, draw the room to scale in the free planner; moving plumbing is usually the biggest hidden cost, and you want to know that before anyone quotes. Third, get at least three itemised quotes and compare them line by line against your range before you commit; the quote check on this site gives you an honest verdict per quote.
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.
How much does the region matter?
A lot: London typically runs 20 to 35 percent above the national average (this site plans with +25%, the quarter mentioned above), and the North of England, Scotland and Northern Ireland sit 10 to 20 percent below. The calculator adjusts for your region automatically, and the regional overview shows every factor.
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.