Gas Boiler - Installation cost guide
Gas Boiler - Installation typically costs between £2,000 and £4,000 for a domestic job in the UK. That is a broad guide, not a quote for your job.
This figure was last updated 18 September 2026.
What affects the price
Where a job like this lands in that range usually comes down to size and scope — a small, straightforward version of the work costs nearer the bottom of the range; a bigger or more complex version costs nearer the top. What you choose for materials, fixtures or finish can be most of the difference within it.
By law, whoever does this work must hold a verified Gas Safe Register. Check before they start, not after.
Before you agree a price
- Get more than one quote for the same job — it gives you something real to compare a price against.
- Ask for the quote in writing: what is included, what is excluded, and roughly how long the job will take.
- A deposit over about a quarter of the job total is unusual for domestic work. Ask why it is needed before you agree to it.
- If the job is gas work, check the tradesperson's Gas Safe registration before they start. It is a legal requirement, not just good practice.