Legionella Delays Push Hospital Build Costs Higher

Legionella Delays Drive Hospital Build Costs Higher: What Healthcare Estates Must Do Before Handover

3 min read

Legionella traces found in the water system at Worthing Integrated Care Centre delayed the project beyond its planned opening date and contributed to the total build cost rising to £49 million. For anyone planning or delivering a healthcare capital project, that figure is not a compliance footnote. It is evidence that water hygiene failures translate directly into inflated costs and postponed patient care. The safest and least expensive moment to secure a waterborne pathogen outcome is before a building opens, not after a problem surfaces.

How can a water hygiene issue on a new building push costs to £49 million?

The Worthing Integrated Care Centre case illustrates a risk that capital project teams frequently underestimate. When Legionella traces are detected in a building water system, the facility cannot open or operate safely. Every week of additional delay carries real costs: extended contractor presence, prolonged preliminaries, additional testing, remediation works and, in a healthcare setting, the continued cost of providing care elsewhere. These costs compound quickly on a scheme that was already over its planned programme.

The £49 million total cost reported for the Worthing project reflects what happens when water hygiene is treated as a commissioning afterthought rather than a designed and verified outcome. By the time traces are found, the project team is reactive. Remediation takes place under time pressure, with a commissioner or board demanding an opening date, which rarely leads to either the lowest cost or the most durable solution.

Why are healthcare buildings at greater risk from Legionella than other building types?

Healthcare buildings combine several conditions that elevate Legionella risk. Water systems in hospitals and integrated care centres are complex, with extensive pipework serving clinical areas, plant rooms, theatres and patient accommodation. Commissioning periods can involve long sections of pipework sitting partially filled or at irregular temperatures, which creates exactly the conditions in which Legionella bacteria multiply. New builds are not inherently safe simply because they are new.

The patient population adds a further dimension. People receiving care in a healthcare setting are, by definition, more likely to be immunocompromised, elderly or recovering from illness. The consequence of a waterborne pathogen outbreak in this environment is not the same as in an office or hotel. Regulators, commissioners and the public hold healthcare estates to a higher standard, and rightly so. That obligation means the cost of getting water hygiene wrong is higher here than almost anywhere else in the built environment.

At what point in a capital project should a safe water outcome be established?

The answer the Worthing case points to is: well before practical completion and certainly before any clinical activity begins. Water system design, fill, flushing, temperature verification and ongoing monitoring need to be treated as a programme-critical workstream, not a box to tick at the end of a snagging list. If safe water outcomes are specified as a project deliverable from the outset, the teams responsible for achieving them have the time and resource to do so without the pressure of an imminent opening date.

Operational readiness in healthcare estates is increasingly scrutinised by commissioners and integrated care boards. A building that cannot demonstrate a safe water outcome at handover is not operationally ready, regardless of what the construction certificate says. Estates leads, project managers and capital programme directors should ensure that water hygiene verification sits alongside fire safety, electrical certification and infection control sign-off as a formal gate before a facility accepts patients.

What ongoing obligation does a healthcare organisation carry once a building opens?

Achieving a safe water outcome at handover is the beginning of an obligation, not the end of one. Healthcare organisations have a duty under health and safety legislation to manage Legionella risk continuously throughout the life of a building. That means written risk assessments, a named responsible person, a documented control scheme and a programme of monitoring and remedial action. These are legal requirements, and failure to meet them exposes organisations to enforcement action as well as clinical risk.

The Worthing situation is a reminder that even a newly commissioned building can carry live risk. Estates teams should not assume that a clean result at one point in time remains valid indefinitely. Water systems change as occupancy patterns shift, as plant is isolated or recommissioned, and as buildings are adapted. Continuous monitoring and a clear escalation process are what separate an organisation that manages Legionella risk from one that discovers it.

Frequently asked

Can Legionella be present in a brand-new building water system?

Yes. The Worthing Integrated Care Centre case confirms this directly. New pipework, tanks and plant can harbour Legionella if conditions during installation and commissioning allow bacteria to establish. Long dead-legs, water sitting at moderate temperatures and inadequate flushing before occupation are all contributing factors that can affect a new build as readily as an older building.

Who is legally responsible for Legionella control in a healthcare building?

The duty holder under health and safety legislation is the organisation that has control of the premises, typically the healthcare provider or estates management body. That duty holder must appoint a responsible person, maintain a written risk assessment and implement a documented control scheme. Delegating delivery to a contractor or specialist does not transfer the legal obligation, which remains with the organisation.

What is the earliest warning sign that a capital project is carrying Legionella risk?

The absence of a safe water outcome as a named, programme-critical deliverable is itself a warning sign. If water hygiene verification is not listed alongside fire safety and electrical certification as a formal handover gate, the project is likely to reach practical completion without adequate assurance. Estates leads should check whether a Legionella risk assessment has been completed, a responsible person named and a monitoring programme established before any clinical occupation begins.