---
title: "Managing agent or landlord: who actually holds the Legionella duty?"
source_url: https://legionella.io/articles/managing-agent-or-landlord-who-actually-holds-the-legionella-duty/
canonical_url: https://legionella.io/articles/managing-agent-or-landlord-who-actually-holds-the-legionella-duty/
pillar: "UK Legionella Law & Compliance"
summary: "Confused about whether the agent or the property owner carries the Legionella duty? Here's how control, contracts and accountability really split — and how to prove it."
primary_keyword: "managing agent Legionella responsibility"
date_published: 2026-02-05
date_reviewed: 2026-06-26
author: "Legionella.io editorial team (REMOTE TECH LTD)"
reviewed_against: "HSE L8 and HSG274 guidance"
region: "United Kingdom"
license: "(c) REMOTE TECH LTD. Quote freely with attribution and a link to source_url."
---

# Managing agent or landlord: who actually holds the Legionella duty?

Both can. That is the answer that catches agents out. The legal duty to assess and control Legionella risk falls on whoever is in control of the premises or the water system — and on most managed properties, control is shared, not handed over [1]. Signing a management agreement does not move the duty cleanly from owner to agent the way a lot of people assume.

Here is the distinction that matters. The owner does not stop being a duty holder simply because they appointed you. And you do not avoid being one simply because you do not own the building. Control is the test, not the title on the deeds [2]. Where you arrange the maintenance, instruct the contractors, and hold the keys to the plant room, you are exercising control — and the law follows control.

So the real job is not arguing about whose duty it is. It is writing down, before anything goes wrong, exactly who does what.

### Who is the duty holder, in plain terms?

The duty holder is the person or organisation in control of the premises, or in control of the water system within it [1]. For a managed property that often means the owner and the managing agent both sit inside the definition, each for the parts they actually control.

Control follows the boundary of responsibility. An owner who hands over full management of a block — repairs, contractors, budgets — passes a large share of practical control to the agent, and the duties move with it. An owner who keeps the maintenance contracts in their own name and uses the agent only to collect rent has kept most of that control. The agreement should say which of these you are. Far too often it says nothing.

### Does appointing a managing agent transfer the legal duty?

Not by itself. You can delegate the work; you cannot fully delegate the accountability by signing a contract [2]. The owner who appoints an agent still has a residual duty to make sure the arrangements are adequate and that a competent person is managing the risk [3].

The pragmatic call: treat the management agreement as the document that allocates the *tasks*, and treat the law as the thing that holds *both* parties to account if those tasks are neglected. A clause saying "the agent is responsible for Legionella" helps organise work and apportion blame between you. It does not, on its own, make an enforcing authority ignore the owner.

## A decision tree for who holds what

Work through this for the specific property in front of you. It routes by control, then by contract.

```
START: Who instructs and pays the water-hygiene contractor / arranges maintenance?

1. The MANAGING AGENT does (repairs, plant, contractors run through the agent)
   -> The agent is exercising control and is a duty holder for the managed parts.
      -> Does the management agreement explicitly assign Legionella RA, monitoring
         and record-keeping to the agent?
            YES -> Agent owns the day-to-day duty; owner keeps a residual oversight
                   duty (confirm the agent is competent and arrangements adequate).
            NO  -> GAP. Duty is ambiguous and likely shared by default. Fix the
                   contract before the next risk assessment is due.

2. The OWNER does (keeps maintenance contracts in their own name)
   -> The owner remains the principal duty holder; agent's role is administrative.
      -> Has anyone confirmed IN WRITING that the agent is NOT responsible for
         water safety?
            YES -> Owner owns the duty; agent records and forwards information only.
            NO  -> GAP. Each party may assume the other is handling it.

3. NOBODY clearly does (no named contractor, no schedule, "we thought you had it")
   -> This is the dangerous branch. There is an unmanaged duty and a real
      compliance gap. Appoint a competent person and assign control NOW.

ALWAYS, regardless of branch:
   - Name a single competent person responsible for the assessment and controls.
   - Put the split in writing in the management agreement.
   - Keep the risk assessment, monitoring records and review dates accessible to
      BOTH parties.
```

The branch that causes real harm is number three. Two parties each assuming the other holds the duty produces a property where no risk assessment exists, no flushing happens, and nobody finds out until a case is reported or an inspector asks.

### What should the management agreement actually say?

Name the property's water-hygiene duties explicitly, by task, not in a single vague line. The clauses worth having: who commissions and reviews the Legionella risk assessment; who arranges monitoring, temperature checks and remedial work; who holds the logbook and records; who pays; and how either party escalates a problem to the other.

In my view the most valuable sentence in the whole agreement is the one naming a single competent person responsible for the water system [3]. Ambiguity between agent and owner is what kills compliance here, and a named individual ends the ambiguity. If your agreements predate this clause, that is the renewal to prioritise.

### Who signs and owns the Legionella risk assessment?

Whoever controls the system should own the assessment, and the competent person who carried it out signs the technical content. On a fully managed property that is usually the agent commissioning a competent assessor and holding the report; the owner should still receive a copy. On a property where the owner keeps the contracts, the owner owns it and copies the agent.

The test is access, not just authorship. If an inspector asks either party for the current assessment and its review date, both should be able to produce it. A split where only one side can find the paperwork has already failed.

### What about a block of flats with a freeholder and an agent?

Communal water systems — shared cold-water tanks, communal risers, plant serving multiple dwellings — sit with whoever controls those communal parts, typically the freeholder or their managing agent, not the individual leaseholders [1]. The leaseholder controls the water inside their own flat once it passes the boundary; the communal infrastructure is the agent's or freeholder's responsibility to assess and control.

Spell out where the boundary falls. The communal cold-water storage tank and the riser are a different duty from the taps inside flat 12, and the assessment should make the demarcation obvious so nothing falls down the gap between them.

### Does this work the same for an HMO?

The principle is identical, but HMOs raise the stakes. A house in multiple occupation often has a more complex system, more occupants, and sometimes more vulnerable ones, so control of that system carries more weight [2]. Whoever manages the HMO — owner or agent, per the agreement — holds the duty for the shared system, and the assessment usually needs to be more thorough than for a single simple let. [Legionella control in residential rental properties](https://legionella.io/articles/legionella-control-in-residential-rental-properties/) covers the residential controls in more depth.

### What happens if there is a case and the duty was never split?

Then both parties are exposed, and the management agreement becomes the document everyone reads very carefully. If control was shared and nobody assessed the risk, an enforcing authority can look at whoever was in control [1]. A clear written split does not make the duty vanish, but it does show that the arrangement was managed deliberately rather than left to chance — which is the difference between a defensible position and an indefensible one.

## A note on the limits of this

This is general guidance on allocating duty, not legal advice, and it does not decide your specific case. The right split depends on what your management agreement says, how control is actually exercised on the ground, and the complexity of the particular system — all of which a competent, site-specific risk assessment should inform. Where the line between owner and agent is genuinely unclear, or the property is a complex block or HMO, resolve it with a competent person and, if the contract wording is contested, legal input rather than a rule of thumb. Any temperature, interval or frequency you act on should come from the property's own assessment, not from this page.

## If you only do one thing

Pull the management agreement for one managed property today and find the Legionella clause. If it does not name who commissions the risk assessment, who holds the records, and a single competent person responsible for the water system, you have found a gap before an inspector did. The cleanest fix is a written split plus a shared, dated record both parties can open — moving the assessment, monitoring log and review dates off one person's filing cabinet and into a digital logbook both the owner and agent can see closes the "we thought you had it" gap for good. For the underlying roles behind all of this, [Duty Holder and Responsible Person roles in Legionella management](https://legionella.io/articles/duty-holder-and-responsible-person-roles-in-legionella-management/) sets out the definitions.

## Related reading

- [Duty Holder and Responsible Person roles in Legionella management](https://legionella.io/articles/duty-holder-and-responsible-person-roles-in-legionella-management/)
- [Landlord responsibilities for Legionella in rental properties](https://legionella.io/articles/landlord-responsibilities-for-legionella-in-rental-properties/)
- [Legionella control in residential rental properties](https://legionella.io/articles/legionella-control-in-residential-rental-properties/)

## Sources

[1] HSE, "Legionnaires' disease - what you must do". https://www.hse.gov.uk/legionnaires/what-you-must-do/index.htm
[2] HSE, "Legionella and landlords' responsibilities". https://www.hse.gov.uk/legionnaires/legionella-landlords-responsibilities.htm
[3] HSE, "Legionnaires' disease. The control of legionella bacteria in water systems - ACoP and guidance (L8)". https://www.hse.gov.uk/pubns/books/l8.htm