If you are organising the documents for a rental property, it is easy to assume every safety responsibility comes with a certificate to buy and renew. Legionella is a useful example of why the underlying task matters more than the document’s label.

This guide is for landlords of ordinary domestic rental properties in England. Complex communal water systems, healthcare settings, cooling towers and spa pools need more specialised guidance.

Quick answer: Health and safety law does not require landlords to obtain a legionella test certificate. You must still assess and control the risk. Routine laboratory sampling is usually unnecessary for domestic hot-and-cold-water systems, and there is no universal legal requirement for an annual or two-year assessment review. Review periodically and when circumstances change. See HSE’s guidance for landlords.

Scope: England, ordinary domestic rental properties. Official sources checked: 24 October 2026.

If a certificate is not required, what responsibility remains?

You still need to understand and manage the risks associated with the property’s water system. A purchased certificate, a risk assessment and a laboratory sample are different things:

  • Assessment: considering the system, exposure and the precautions it needs.
  • Sampling: testing water for legionella where the circumstances warrant it.
  • Certificate: a document whose title alone does not establish that the appropriate assessment and controls are in place.

The HSE L8 Approved Code of Practice and guidance describes the wider framework: identify risks, plan and implement precautions, manage them and keep the relevant records. For a small domestic let, use the domestic-specific guidance rather than copying a checklist intended for an industrial installation.

What is legionella, and why does the system matter?

Legionella is a type of bacteria associated with water systems. Exposure can occur through breathing in contaminated water droplets. For a landlord, the practical question is how the particular installation is used and maintained.

HSE’s risk-assessment guidance asks you to understand the equipment and system components. Relevant considerations include water storage, conditions that could support bacterial growth, outlets that produce droplets and the people who could be exposed.

Knowing only the boiler brand is not the same as understanding the whole installation. If you cannot explain the water supply and storage arrangements, make that an open question for competent help rather than guessing a low-risk conclusion.

Can I assess a simple rental property myself?

Competence depends on sufficient knowledge, experience and other relevant qualities. HSE says you may carry out the assessment yourself if competent; otherwise, obtain help from a competent person. The assessment should identify responsibilities, risk sources, controls and review arrangements.

A generic downloaded form is only a prompt. It cannot inspect the property or decide whether a particular answer is correct. Complete the assessment for the actual system, and seek help where your knowledge stops.

When using someone else, ask what their assessment covers, what they found and what actions remain. Keep the explanation alongside any report. A document filed without its action list is difficult to use when a tenant later reports a problem.

Does every property need water sampling?

No. HSE distinguishes laboratory sampling from the usual management of domestic water systems. Sampling is generally reserved for specific circumstances; it is not an automatic annual purchase for every rental home.

That does not mean testing is never appropriate. Follow the assessment and competent advice where there is uncertainty. Nor should a sample result be treated as a substitute for understanding and maintaining the system.

What changes when the property is empty?

Extended vacancy changes how water is used. HSE highlights the need to manage stagnation in empty properties. Plan appropriate measures for the installation and the length of the vacancy rather than waiting until the next tenant arrives.

For your own admin, record who will look after the property during the gap, how they will receive the agreed instructions and where completion notes belong. If contractors attend for other work, make clear which water-system tasks they have actually agreed to undertake.

This guide does not prescribe flushing frequencies, treatment or temperature settings. Those decisions need the relevant technical guidance and system context, including scalding risks where applicable.

What should tenants know?

Give tenants clear information relevant to the controls in place and an easy way to report water-system problems. Explain how to contact you if something changes, and keep a copy of the information you supplied.

A practical message should identify the property, the issue to report and the contact route. Avoid burying important instructions inside a long collection of unrelated documents. Asking tenants to report concerns supports your management process; it does not transfer your assessment responsibility to them.

When should I review the assessment?

Set a proportionate review arrangement and respond to relevant changes. A diary reminder can help you revisit the record, but it is an administrative choice, not evidence that a universal “legionella certificate expiry date” exists.

HSE’s review guidance focuses on whether the assessment and controls remain effective. It asks about an up-to-date description of the system, responsibilities, competent contractors and the checks appropriate to the risks. Inspection and maintenance frequency depend on the system.

For example, after plumbing alterations, compare the work completed with the description you previously relied on. Record what changed and establish whether the assessment needs updating. Do not simply move an old reminder forward while leaving its assumptions unchecked.

Should I keep a written record?

HSE’s record-keeping guidance distinguishes employers with five or more employees, who must record significant findings, from those with fewer employees. It also explains that a written record is useful even where that recording requirement does not apply.

For a small landlord, a proportionate property file can make the work easier to follow. This practical checklist is a filing aid, not a technical assessment template:

  • Identify the property and the system assessed.
  • Keep the assessment date and who carried it out.
  • Save findings, agreed actions and responsibility for each action.
  • Keep relevant control information and maintenance records.
  • Record changes, reviews and reasons for further advice.

Separate outstanding actions from completed work. If a report recommends further investigation, retain that recommendation where you will see it. Our landlord document checklist gives the wider filing context.

How can Propiva help organise the records?

Propiva is UK compliance software for self-managing landlords. Property-document uploads can keep assessment notes and related records together. Tenants can submit maintenance requests with photos; landlords receive notifications and can update job status for tenants to see.

These tools support organisation and follow-up. Propiva does not assess legionella risk, test water, certify safety, monitor temperatures or decide the correct review interval. Any technical action still needs the appropriate person and advice.

Sign up free at propiva.app. Your first property is free.

Common questions

Does a combi boiler mean I can skip the assessment?

No. Consider the whole system and its use rather than treating one appliance as an automatic exemption.

Should I add a yearly certificate purchase to my checklist?

Start with the assessment, controls and review arrangements. Check what any offered service actually provides. Our landlord certificates guide covers the broader document picture.

Disclaimer: This guide is provided for general information only and does not constitute legal, financial or professional advice. Rules and requirements may vary depending on your location and circumstances and can change over time. Always check current official guidance and seek professional advice where appropriate.