Legionella Risk Assessments & Water Hygiene

Water-system assessments, monitoring and remedial support for property owners and managing agents across London.

Bigness Built Environment arranges Legionella risk assessments and water hygiene services, helping clients understand their water systems, organise recommended controls and keep supporting records current.

Whether you need a new assessment, a review of existing arrangements or help completing outstanding actions, we provide one point of coordination.

What Is a Legionella Risk Assessment?

A Legionella risk assessment examines the water systems and operating conditions that could allow Legionella bacteria to grow and expose people to risk.

It considers the system’s design, condition, use and management, alongside existing precautions. The findings identify whether further controls, monitoring or remedial work are needed.

Our service focuses on hot and cold water systems in residential buildings, communal facilities and commercial premises.

What We Can Help With

Depending on your building and the assessment findings, we can arrange:

• Legionella risk assessments and assessment reviews.
• Inspection of accessible tanks, cylinders, outlets and associated water services.
• Water temperature checks and monitoring programmes.
• Review of flushing arrangements for little-used outlets.
• Cleaning, descaling and disinfection where recommended.
• Water sampling and laboratory analysis where appropriate.
• Plumbing remedial works to address identified system issues.
• Organisation of water hygiene records and outstanding actions.

Sampling requirements and monitoring frequencies are determined by the system and risk assessment, rather than included automatically in every visit.

Understanding Your Water System

We bring together available information about the building, water-system layout, occupancy and existing maintenance arrangements.

The appointed specialist considers relevant factors such as water storage, temperatures, stagnation, outlet use and people who may be particularly vulnerable.

Access requirements, assessment scope and any limitations are confirmed before the visit.

Competent Water Hygiene Specialists

Assessments and specialist water hygiene work are carried out by competent professionals with experience relevant to the system being assessed.

Bigness coordinates attendance, access, information and follow-up activities. The appointed specialist remains responsible for their assessment findings, technical recommendations and specialist reports.

From Assessment to Ongoing Control

An assessment provides the starting point for managing identified risks.

Bigness can help turn its recommendations into an organised programme by:

• Recording actions and the priorities assigned by the assessor.
• Arranging recommended monitoring and maintenance.
• Obtaining quotations for corrective work.
• Coordinating approved plumbing or specialist interventions.
• Collecting monitoring results and completion evidence.
• Arranging assessment reviews when changes or findings warrant them.

Additional remedial works, sampling and specialist investigations are quoted separately unless included in the agreed scope.

What You Receive

For an agreed assessment service, you receive a written report describing the assessed systems, findings, limitations and recommended actions.

Where ongoing water hygiene support is included, we also organise the relevant monitoring records, specialist reports and completion documentation.

This gives you a clearer view of what has been checked, what needs attention and which actions remain outstanding.

Request an Assessment or Water Hygiene Visit

Tell us the property address, building type and whether you need a new assessment, temperature monitoring or help with an existing report.

Upload previous assessments, water-system records or photographs using the enquiry form. We will review your requirements and confirm the proposed scope and quotation.