Radon Risk Advice for Renters in Northern Ireland

Radon is an invisible gas that can build up in homes and increase long-term health risks, so tenants and renters in Northern Ireland should know how to test, act and raise issues safely. This page explains simple steps for measuring radon at home, how to ask your landlord to fix high levels, and where to get official help if you cannot resolve the problem locally. It uses plain language for tenants who are not legal experts and highlights your options under Northern Ireland law, practical examples of communication with landlords, and what to bring if you need to escalate to an official body.

What is radon and why renters should care

Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. It can enter a building through gaps in floors, walls or service voids and accumulate to levels considered hazardous over long exposure. Tenants should prioritise testing when moving in, after major building work, or if a short-term test and symptom pattern suggests poor indoor air quality. Keep copies of any test results and communications with your landlord; these are often needed if you later pursue formal advice or a dispute.

How radon is measured and action levels in Northern Ireland

Official guidance recommends long-term measurement (typically three months or more) using passive detectors for homes. Short-term tests exist but may miss seasonal variation. In the UK the usual action level is 200 becquerels per cubic metre (Bq/m3) averaged over the measurement period; if measurements exceed that level, remediation should be considered. Order test kits from an approved provider or follow government guidance on detector placement, duration and lab return procedures.^[1]

• Order a long-term detector and place it in a main living area or bedroom for at least three months.
• Keep records and photos of detector placement and any instructions from the supplier as evidence.
• Return the detector to the analysing laboratory promptly and await the lab report.

What to do if radon levels are high

If your test report shows levels above the action level, tell your landlord in writing, include a copy of the lab report and request remediation. Typical mitigation measures include improving underfloor ventilation, sealing entry points, and installing sub-slab or sump depressurisation systems. Landlords often arrange and pay for remedial works where a property fails to meet safety standards; you can offer reasonable access dates and keep a written log of any delays or refusals.

• Send a dated written notice to your landlord with the test report attached and a clear request for mitigation.
• If the landlord agrees, arrange a mutually convenient appointment for a survey and remedial works.
• If the landlord refuses or delays, keep records of all communications and copies of the report for any formal complaint or tribunal application.

Legal rights and enforcement in Northern Ireland

Housing and landlord/tenant relationships in Northern Ireland are governed by the Private Tenancies Act (Northern Ireland) 2022; technical health and safety duties can also arise from broader housing standards and environmental protection rules. If you cannot agree a solution with your landlord you may be able to ask the Residential Property Tribunal (or equivalent housing body) to consider the matter or seek advice from the Department for Communities. When you apply to an official body, attach your test report, photographs, a chronology of contact, and any written landlord responses to support your case.^{[2] [3]}

FAQ

How soon should I test a rented home for radon?

You should test as soon as possible after moving in and again after major building work or if you suspect buildup; long-term tests (three months) give the most reliable result.

Who is responsible for fixing high radon levels?

Responsibility normally falls to the landlord to arrange and pay for remedial works to make the property safe, but you should notify them in writing and keep records of your request.

What if my landlord does not act after I report high radon?

If the landlord fails to act, you can seek help from the Department for Communities, apply to the appropriate tribunal, or obtain official advice on next steps using your documented evidence.

How-To

1. Order or purchase a long-term radon detector and read the supplier instructions carefully.
2. Place detectors in primary living spaces and leave them undisturbed for the recommended period (usually three months).
3. Return the detector to the lab, save the official report, and take dated photos of placement and packaging.
4. Send the lab report to your landlord in a dated written notice requesting remediation and propose reasonable access dates.
5. If the landlord does not act, contact the Department for Communities or the Residential Property Tribunal and submit your evidence to pursue a formal outcome.

Help and Support / Resources

• Private Tenancies Branch, Department for Communities
• NI Direct: Renting and letting guidance
• GOV.UK: Radon - guidance for households

1. [1] GOV.UK: Radon guidance for households
2. [2] Private Tenancies Act (Northern Ireland) 2022
3. [3] Residential Property Tribunal (Northern Ireland)