Legionella risk assessments for landlords in the Republic of Ireland
The Republic of Ireland is a separate jurisdiction from the United Kingdom. UK guidance — including the HSE's Approved Code of Practice L8 — is not Irish law, and an Irish landlord should work from Irish legislation and Irish national guidance.
The honest position is more nuanced than in the UK: there is no single Irish rule that says every private landlord must hold a Legionella risk assessment. This page sets out what does apply, and why a property-specific water risk assessment is prudent risk management.
The short answer
There is no Irish provision that unequivocally requires every private landlord to hold a Legionella certificate or assessment.
Occupational safety duties under the Safety, Health and Welfare at Work Act 2005 and the Biological Agents Regulations, overseen by the Health and Safety Authority, may apply depending on the letting and business circumstances, and the HPSC publishes national guidance on the control of Legionellosis. Separately, the minimum standards for rented houses require safe, properly maintained hot and cold water facilities.
Against that background, a property-specific water risk assessment is best understood as prudent risk management and good evidence of the condition of the system — not as a statutory certificate demanded of every Irish private landlord.
Official guidance from Health and Safety Authority (HSA) for occupational dutiesAt a glance
- Regulator
- HSA for occupational safety duties; HPSC for national Legionellosis guidance; local authorities for rental minimum standards
- Legal and guidance basis
- Safety, Health and Welfare at Work Act 2005 and the Biological Agents Regulations where they apply, HPSC national guidance, and the Housing (Standards for Rented Houses) Regulations 2019
- Professional assessor required?
- No general requirement for a straightforward domestic property; complex, communal or higher-risk systems should be referred
- Fixed annual renewal?
- No fixed statutory Legionella renewal for private lettings; review when the system or occupancy changes
- Routine laboratory water testing?
- Not normally expected for a straightforward domestic property; sampling is a specialist step in higher-risk or investigative situations
What this means for a typical rental property
A typical Irish rental is a house or apartment on a public or group scheme supply. Attic cold water storage tanks remain common in houses, and apartments frequently sit within a shared building with communal risers, pumps or storage.
Where there is an attic tank, its cover, insulation and condition are the first things worth looking at. Where the property is an apartment, be clear about where your responsibility ends and the management company's begins.
Combi boiler and no hot-water cylinder
Where the property has a combination boiler or another instantaneous system with no stored hot water, the risk is commonly lower because water is heated on demand. It is not eliminated. Continue to check stagnation and little-used outlets, shower head and hose cleanliness, the temperature and condition of the cold supply, dead legs and redundant pipework, and any occupant or system factors that increase exposure or susceptibility.
How to carry out a proportionate Legionella risk assessment
- 1
Understand the water system
Record how water is heated and whether it is stored: a combination boiler with no cylinder, a vented cylinder with a loft tank, an unvented cylinder, or a shared or communal arrangement. Note tanks, pumps, softeners and any pipework you cannot account for.
- 2
Identify who is exposed and how
Legionella causes harm when contaminated water is breathed in as fine spray. Note showers, spray taps, hoses and any occupants who may be more susceptible, such as older people or those with weakened immunity.
- 3
Inspect storage, pipework and outlets
Look at the cylinder or tank where one is fitted, tank lids and insulation, exposed pipework, shower heads and hoses, and any outlet that is rarely used. Note redundant pipework and dead legs that let water sit.
- 4
Record readings and observations using a documented method
Where practical, run each outlet and note the hot and cold temperatures reached, the run time and the outlet. These are monitoring observations supporting your judgement about the system, and are not microbiological testing. Where the property is served by a group water scheme or private supply, note that too.
- 5
Identify proportionate actions
Typical actions are descaling and cleaning shower heads, flushing little-used outlets, removing redundant pipework, adjusting a cylinder that is running cool, and giving the tenant simple advice about flushing after a period away.
- 6
Review when circumstances change
Reassess after works to the plumbing, a change of heating or hot-water system, a long void, a change in who occupies the property, or anything that suggests the earlier assessment no longer describes the system.
Rental minimum standards and the RTB
The Housing (Standards for Rented Houses) Regulations 2019 set the minimum standards for rented accommodation and are enforced by local authorities. They require, among other things, a supply of water and properly maintained facilities for heating water, so the condition of the hot and cold systems is already within scope of an inspection.
Tenancies are registered with the Residential Tenancies Board, and the RTB publishes the minimum standards landlords must meet. A dated water risk assessment recording the system, its condition and any actions gives you a clear evidence trail if a standards inspection or a tenant complaint follows.
Where a letting is run as a business and people are at work in or around the property, occupational duties under the 2005 Act and the Biological Agents Regulations may also be engaged. Whether they apply depends on the circumstances of the letting, which is why this page does not present them as a blanket duty on every private landlord.
When self-assessment is not appropriate
Refer the property to a competent specialist, or to whoever controls the shared plant, where any of the following apply. Deciding whether you have sufficient competence for a particular system remains your judgement.
- Apartment blocks with communal risers, shared storage, pumps or shared hot water
- Large or complex stored systems, or an attic tank in poor or uncertain condition
- Group water schemes or private supplies where source and condition are unclear
- Spa pools, hot tubs, cooling towers or evaporative cooling equipment
- Occupants who are significantly more susceptible to infection
- Readings that stay abnormal after the obvious actions have been taken
- Any situation where you do not consider yourself competent for that system
What records should a landlord keep?
- A description of the water system, including the supply type, how water is heated and whether it is stored
- A room-by-room list of outlets, including showers, little-used taps and outside taps
- Hot and cold observations taken after running, with the date and the outlet they relate to
- Whether an outlet is blended through a thermostatic mixing valve
- The condition of any attic storage tank, its cover and insulation
- Photographs or notes supporting anything unusual
- The findings, the action identified for each, and whether it has been completed
- Advice given to the tenant, and any flushing carried out during a vacancy
- The date of the assessment and the point at which you intend to review it
Republic of Ireland landlord questions answered
Is a Legionella risk assessment legally required for Irish landlords?
There is no Irish provision that clearly requires every private landlord to hold one. Occupational duties under the Safety, Health and Welfare at Work Act 2005 and the Biological Agents Regulations may apply depending on the letting and business circumstances, and rental minimum standards require safe, maintained water and water-heating facilities. A property-specific water risk assessment is prudent risk management and useful evidence.
Does UK ACOP L8 apply in Ireland?
No. ACOP L8 is UK guidance made under UK legislation. Irish landlords should work from Irish law, HSA guidance and the HPSC's national Legionellosis guidance.
Do I need a Legionella certificate for an Irish rental?
There is no statutory Legionella certificate for private lettings in Ireland. A dated water risk assessment report describing the system, the checks, the findings and any actions is the useful record.
How often should the assessment be reviewed?
No fixed statutory frequency applies to private lettings. Review when the system or its use changes: plumbing or heating works, a change of hot-water arrangement, a long vacancy, a change of occupants, or works to shared building services.
Does a combi boiler mean I can skip the assessment?
No. Heating water on demand commonly lowers the risk, but stagnation, little-used outlets, dead legs and scaled shower heads can still matter, so the property is still worth assessing.
Do I need laboratory water sampling?
Routine microbiological sampling is not normally expected for a straightforward domestic property. Sampling is a specialist step used in higher-risk or investigative situations; temperature observations are monitoring evidence, not a laboratory test.
Turn the guidance into a property-specific record
LegionellaWise walks through the property room by room, prompts for the outlets and observations that matter for the system you describe, and keeps photos attached to the finding they support. The result is a structured, versioned Legionella risk assessment report you can retain or share with a tenant or agent.
You can set a review reminder for a date you choose. That is a prompt for your own diary — the need to review is driven by changes to the property and its risk, not by a reminder expiring. LegionellaWise guides and records the work; deciding whether you have sufficient competence for the system remains yours.
Check if your Republic of Ireland property is suitable
Official sources
- HSA — Legionellosis
- HPSC — Legionellosis guidance
- RTB — Minimum standards for rental properties
- Housing (Standards for Rented Houses) Regulations 2019 (S.I. 137/2019)
General information for landlords, not legal advice. Always check the current guidance published by the regulator for your jurisdiction.