The short answer
There is no reliable single price for radon mitigation. The method, floor construction, access, electrical work and retesting affect the quotation. Treat published historical figures as context and request a current property-specific price.
What affects the price?
The measured radon level helps inform the proposed remedy. A straightforward installation in one floor zone may differ substantially from a property with several extensions, mixed floors or a basement. Ask the contractor to explain why the proposed approach fits the building.
- Number of extraction points and complexity of pipe routing
- Access to floors, roof spaces and external walls
- Fan specification, power supply and electrical installation
- Making good, noise control and weather protection
Why published prices need context
UKradon publishes approximate remedy costs based on data collected between 2007 and 2017. They are useful for understanding the relative scale of different methods, but should not be presented as current quotations or a price promise.
| Method | Historical typical cost | Historical range up to |
|---|---|---|
| Active sump with fan | £800 | £2,000 |
| Positive ventilation | £550 | £1,000 |
| Active under-floor ventilation | £700 | £1,500 |
Compare the whole quotation
Ask for a written scope covering equipment, labour, VAT, making good and any exclusions. Confirm who arranges follow-up testing, what maintenance is needed and what the contractor proposes if the initial result remains elevated.
Allow for running costs and maintenance
Fan-based systems normally need ongoing power. Ask for the fan’s power consumption and estimate the annual cost using your own tariff. Include servicing, potential fan replacement and future measurements in your budget.
Get a price for your property
Send the complete test report, address and a description of the floor construction if known. Photographs can help the contractor prepare, but a site visit may still be needed before a firm quotation.
Sources & further reading
UKHSA: reducing radon levels and historical costs ↗Checked 13 September 2026. General property guidance; use the original source and seek professional advice for your circumstances.