Cost of Legionella Risk Assessment
across the UK

How much does Legionella Risk Assessment cost in the UK?

Legionella Risk Assessment costs typically range from £300 to £1,500 depending on property size and complexity. Small businesses pay around £400–£600, whilst larger commercial premises may cost £800–£1,500. Residential properties and landlords often find assessments at the lower end of this range.

What affects the cost of Legionella Risk Assessment?

Five factors impact pricing: property size and water system complexity, number of water outlets and storage tanks, accessibility of pipework and equipment, whether specialist equipment testing is required, and the assessor's travel distance. Multi-building sites or properties with intricate heating systems command higher fees.

What does a Legionella Risk Assessment service actually include?

A comprehensive assessment includes visual inspection of all water systems, temperature testing of storage and distribution points, water sampling and microbiological testing, documentation review of maintenance records, identification of hazards, and a detailed written report with remedial recommendations and compliance certificates for HSE requirements.

What's the difference between a Legionella survey and a full risk assessment?

A survey is a visual inspection only, identifying potential risks without testing. A full risk assessment includes surveys plus water temperature and microbiological sampling, detailed analysis, remedial action plans, and HSE-compliant documentation proving your duty of care under the Health and Safety at Work Act.

What should I check before hiring a Legionella Risk Assessment provider?

Verify UKAS accreditation for water testing laboratories, CIEH (Chartered Institute of Environmental Health) or equivalent qualifications for the assessor, and HSE compliance expertise. Check they provide written reports, hold professional indemnity insurance, and have experience with your building type. Request references from similar clients.

How long does it take to get Legionella Risk Assessment results?

Initial assessment and visual inspection typically take 2–4 hours on site. Microbiological water sample results arrive within 5–7 working days from laboratory testing. Your complete written report and recommendations are usually delivered within 10–14 days, though urgent reports may be available sooner.

Does Legionella Risk Assessment need to be done by a certified professional?

Yes, whilst not statutorily mandated to use certified assessors, HSE guidance strongly recommends employing qualified professionals with CIEH or equivalent credentials. Using accredited assessors ensures compliance, provides defensible documentation for duty of care, and holds legal weight if disputes or outbreaks occur.