Costs guide
Radon Survey & Test Cost UK (2026)
Updated 11 June 2026
A home radon test costs around £50 to £200 in 2026 depending on whether you use a short-term detector pack or a longer three-month measurement. Before paying for a test, you can check a property's radon risk for free by its postcode: radon is a naturally occurring radioactive gas that varies by geology, and only some areas are affected. HomeBuyerCheck flags radon risk at the exact address as part of its £4.99 Premium report.
Radon testing and risk-check costs (UK, 2026)
| Option | Typical cost | What you get |
|---|---|---|
| Radon risk check by postcode | Free to £4.99 | Whether the address is in a radon area |
| Short-term radon detector pack | £50 to £100 | An indicative reading |
| Three-month validated radon test | £50 to £200 | An accurate average measurement |
| Radon remediation (sump, ventilation) | £500 to £2,000+ | If high levels are confirmed |
What a radon survey is
Radon is a natural radioactive gas released from the ground. In most of the UK levels are harmless, but in certain areas, driven by the local geology, radon can build up inside buildings to levels worth reducing. Radon testing measures the concentration inside a property.
A radon survey usually means placing detectors in the home for a period, then having them analysed. A short-term pack gives a quick indicative reading; a validated three-month test gives an accurate average, which is the figure used to decide whether action is needed.
What radon testing costs
- Checking the radon risk of an address by postcode: free, or included in a £4.99 property report.
- A short-term radon detector pack: around £50 to £100.
- A validated three-month radon measurement: around £50 to £200.
- Remediation if high levels are confirmed (sump, improved ventilation): £500 to £2,000 or more.
Check radon risk before you buy
You do not need to test before you offer, but you should know whether a property is in a radon affected area, because that tells you whether testing and possible remediation are even in play. This is a free risk check based on the property's location.
If an address sits in a higher radon area, you can factor a test, and the small chance of remediation, into your decision and your offer. If it does not, radon is not something you need to spend on at all.
Radon risk in your property report
HomeBuyerCheck's £4.99 Premium report flags radon risk at the exact address using official data, alongside ground stability, coal mining, listed and conservation status, ownership from HM Land Registry and an AI buyer's verdict.
That means you learn whether radon matters at a property for £4.99, before you commit to a test or a survey. The £6.99 Premium+ report adds AI solicitor and surveyor briefs that tell you what to raise if radon or ground risk is flagged.
Check any UK property before you offer
Free instant report; Premium from £4.99 adds ownership, ground risk and AI buyer's verdict.
Frequently asked questions
How much does a radon test cost in the UK?
A home radon test costs around £50 to £200 in 2026: roughly £50 to £100 for a short-term detector pack, or £50 to £200 for a validated three-month measurement. Checking the risk by postcode first is free or part of a £4.99 report.
How do I check a property's radon risk before buying?
Radon risk varies by location, so it can be checked by postcode for free. HomeBuyerCheck's £4.99 Premium report flags radon risk at the exact address, so you know whether testing is worth it before you offer.
Do I need a radon test when buying a house?
Only if the property is in a radon affected area. Check the risk by location first; if the address is not in a radon area, no test is needed. If it is, a £50 to £200 test confirms the actual level.
What does it cost to fix high radon levels?
Radon remediation, such as a sump and improved ventilation, typically costs £500 to £2,000 or more. It is only needed where a validated test confirms levels above the action level, which affects a minority of homes.
Is radon risk included in a property report?
Yes. HomeBuyerCheck's £4.99 Premium report flags radon risk at the exact address using official data, alongside ground risk, coal mining and ownership, so you understand the full risk picture before you buy.
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