If you are a landlord in Kent, London or anywhere else in England, legionella control belongs on your compliance checklist. It may not be as familiar as gas safety or energy performance, but it is still an important part of managing a safe rental property.
A documented landlord legionella risk assessment helps you understand how water is stored, heated and distributed around the property. It also shows that you have taken sensible steps to identify and control potential risks.
The good news? Most domestic properties are straightforward to assess. The less good news? Ignoring the issue can become expensive, particularly if a tenant becomes ill, an enforcing authority asks questions or your insurance provider requests evidence of responsible management.
Here is what landlords need to know in 2026.
What is a landlord legionella risk assessment?
A legionella risk assessment is a structured review of the water systems within a property. It identifies where Legionella bacteria could grow and how tenants might be exposed, particularly through inhaling contaminated water droplets from showers or taps.
The assessment considers factors such as:
- How water enters and moves through the property
- Whether hot water is stored or produced instantly
- Cold water storage tanks and hot water cylinders
- Calorifiers and other stored-water systems
- Dead legs, redundant pipework and little-used outlets
- Shower heads, hoses and spray taps
- Water temperatures at key outlets
- Opportunities for stagnation, scale or contamination
- The condition of tanks, pipework and fittings
- The control measures and records needed going forward
It is not simply a case of taking one water sample and filing the result away. In many ordinary domestic properties, a competent assessment focuses on the system design, temperatures, usage and practical control measures.
A proper assessment should leave you with a clear written record of the findings, any recommended actions and the steps needed to keep the risk under control.
Why are landlords responsible?
The Health and Safety Executive’s Approved Code of Practice L8 sets out accepted guidance for controlling Legionella in water systems. It places responsibility on the relevant dutyholder to assess risk, introduce suitable controls and review them when circumstances change.
For most rented homes, that responsibility rests with the landlord or the person managing the property.
The Landlord and Tenant Act 1985 also matters. Section 11 requires landlords to keep installations for the supply of water and the heating of water in proper repair and working order. Poorly maintained tanks, persistently low hot-water temperatures or neglected pipework can all create avoidable concerns.
In practical terms, you should be able to show that you understand the water system in your property and that you have taken reasonable steps to manage it. Compliance is not about producing impressive paperwork for its own sake. It is about making sure the water system is safe, understood and properly maintained.
Who needs a legionella assessment for landlords?
In principle, every landlord should consider Legionella risk. This includes:
- Private landlords with one rental property
- Portfolio landlords
- Property managers
- Letting agencies managing properties for clients
- Social housing providers
- Owners of houses in multiple occupation
- Developers preparing newly completed properties for occupation
The level of risk varies significantly. A two-bedroom flat with a combination boiler and regular occupancy is usually simpler than an eight-bedroom HMO with stored hot water, long pipe runs and several shared bathrooms.
However, “low risk” does not mean “no risk”. Even a simple flat should be considered, particularly if it has showers, little-used outlets or periods of vacancy.
If you are taking on a new property, changing the water system, converting the accommodation or preparing for a new tenancy, it is sensible to review the assessment rather than assume an old document still tells the full story.
How often should a landlord legionella risk assessment be reviewed?
There is no universal rule saying that every rented property must have a completely new assessment every 12 months. The assessment must remain suitable, sufficient and up to date.
As a practical benchmark, many landlords review a straightforward domestic system:
- At least every two years
- When there is a change of tenancy
- When the water system is altered
- After significant plumbing or bathroom works
- Following a prolonged vacancy
- If the property’s use or occupancy changes
- If previous controls are not working properly
More complex properties often require more frequent reviews. An HMO, property with stored water or building occupied by vulnerable residents may justify an annual review or a more detailed ongoing control programme.
The important point is to avoid treating frequency as a magic number. A review carried out after a major system change is more valuable than a routine document that ignores what has actually changed.
Keep the assessment, temperature records, remedial work and control measures together. If you use a property manager, agree who owns the review date and who acts on recommendations. Compliance tends to unravel when everybody assumes somebody else is keeping the file updated.
What does the assessment involve?
A competent assessor starts by understanding the property rather than applying a generic template.
1. Reviewing the water system
The assessment identifies whether the property uses a combination boiler, hot water cylinder, cold water tank, calorifier or another arrangement. It should also record the main outlets and the route water takes through the building.
2. Identifying risk points
The assessor looks for areas where water may stagnate or remain at temperatures that allow bacteria to multiply. These can include dead legs, capped-off pipework, rarely used taps, shower hoses, loft tanks and long distribution runs.
3. Checking temperatures
Hot water temperatures should be considered at the storage system and sentinel outlets. Cold water temperatures may also be checked where appropriate. The purpose is to confirm whether the system is operating within suitable control parameters.
4. Looking at showers and outlets
Showers and spray-producing outlets deserve particular attention because they can create airborne droplets. Shower heads and hoses should be clean, accessible and maintained. Little-used outlets may also require a flushing arrangement.
5. Recording control measures
The written assessment should explain what needs to happen next. This may include regular outlet use, cleaning shower heads, removing redundant pipework, maintaining temperature controls or arranging remedial plumbing work.
6. Preparing a written scheme where required
More complex systems may need a written scheme describing responsibilities, monitoring, maintenance and response procedures. Make sure the document is practical enough for the landlord, property manager or contractor to follow.
A useful assessment gives you actions you can understand and implement. If the report is full of technical terms but does not tell you what to do on Tuesday morning, it has not done its job particularly well.
Flats versus houses: is one riskier than the other?
The type of property matters, but the building label alone does not determine the risk.
A modern flat with a combination boiler often has a relatively low-risk water system. Water is heated on demand, with no large stored hot-water cylinder or cold-water tank. That reduces the opportunity for stagnation and bacterial growth.
It does not remove the need for an assessment. Showers, little-used taps, vacant periods and shared or concealed pipework can still create issues.
A house with a hot-water cylinder or loft storage tank may require closer attention. The same applies to older homes with redundant pipework, extended plumbing or multiple bathrooms.
Flats can also become more complicated where the water system is shared, managed by a freeholder or supplied through communal plant. In that situation, clarify which party is responsible for the assessment and which controls apply to the individual dwelling.
For a legionella risk assessment in Folkestone, Canterbury, Maidstone, Ashford or elsewhere in Kent, local property knowledge is useful because building age, property type and management arrangements can vary considerably.
What does a legionella risk assessment cost?
The typical legionella risk assessment cost depends on the property’s size, location, water system and complexity.
As a broad 2026 guide:
- A simple domestic flat or house may cost around £75 to £150
- A property with stored water, more outlets or additional risk factors may cost more
- An HMO or complex system may cost approximately £150 to £350 or more
- Larger buildings and portfolios are usually priced according to the scope of the work
These figures are indicative rather than a fixed tariff. Ask what the price includes. A very cheap document may not include meaningful temperature checks, a site visit or practical recommendations.
Also check whether follow-up work, laboratory testing, remedial plumbing or a written control scheme is charged separately. A clear quotation prevents awkward surprises later.
What happens if you skip it?
Failing to manage Legionella risk can create several problems.
An enforcing authority may ask how you have assessed and controlled the water system. If you cannot produce suitable records, you may face enforcement action and potentially significant fines, depending on the circumstances.
There is also the risk of a civil claim if a tenant alleges that illness resulted from a failure to manage the property safely. Your insurer may ask for evidence that you have maintained the property responsibly, particularly after a serious incident.
There are practical consequences too. A missed assessment can allow small defects to become expensive repairs. Redundant pipework, poor temperature control or neglected tanks are easier to address when identified early.
Good documentation does not guarantee that nothing will ever go wrong. It does show that you are taking your responsibilities seriously and acting on problems promptly.
How Evestaff helps landlords stay organised
Evestaff Property Inventory Clerks has supported property professionals since 2012, bringing more than 12 years of experience to inspections and property documentation across London and Kent.
Our approach is meticulous and precision-focused. As accredited members of ECMK, we understand the importance of clear evidence, consistent reporting and professional standards.
A landlord legionella risk assessment can fit neatly alongside an inventory, check-in or mid-term inspection in a single visit. That can reduce access arrangements, minimise disruption for tenants and give landlords or property managers a more complete view of the property’s condition.
During a combined visit, we can help identify relevant water-system features, document observations and provide a structured report for your compliance records. Where specialist testing or remedial plumbing is required, we can highlight the issue so that the appropriate contractor can be involved.
Our modern reporting technology and experienced clerks help you manage the detail without turning compliance into a full-time occupation. That is particularly useful for letting agencies and property managers handling several properties across Kent and London.
If you are booking your first service with Evestaff, ask about the 10% discount for new customers on their first booking. You can also recommend us through our Refer a Friend offer.
Final checklist for Kent landlords
Before you let or renew a property, make sure you:
- Identify the type of water-heating and storage system.
- Arrange a suitable landlord legionella risk assessment.
- Check for tanks, cylinders, dead legs and little-used outlets.
- Review hot-water and sentinel outlet temperatures.
- Record shower, tap and flushing arrangements.
- Keep the written assessment and follow-up actions together.
- Review the assessment at least every two years, and sooner when circumstances change.
- Coordinate the assessment with your inventory or mid-term inspection where practical.
A combination boiler may make a property lower risk, but it does not make compliance optional. For landlords in Kent and London, a well-managed water system and a clear paper trail are small investments in tenant safety, legal protection and peace of mind.
For professional property reporting and coordinated inspection support, visit propertyinventoryclerks.co.uk.
Join The Discussion