This brief summarises reporting published by www.citylets.co.uk on 23/09/2026. Claims below are attributed to that source.
The duty is triggered when the landlord becomes aware of a possible problem.
Awareness includes informal reports, contractor observations or sensor data, not just formal tenant complaints.
Landlords must provide tenants with a written summary of the investigation within three working days.
When substantial damp or mould is identified, repair work must begin within five working days. There is no statutory 20‑day completion rule; repairs must be finished within a reasonable period.
