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What is Damp and mould?

Last verified 23 October 2026

Damp and mould in a rented home means excess moisture in the building, from condensation, rain getting in, rising damp or leaks, and the mould growth that follows. Government guidance treats it as a serious health risk, especially for children, older people and anyone with a respiratory or immune condition.

Why it matters to landlords

In England, damp and mould can be assessed as a hazard under the Housing Health and Safety Rating System, and a home must be fit for human habitation. Government guidance says landlords should respond quickly, find and fix the underlying cause rather than just removing surface mould, and not blame tenants' 'lifestyle'. Medical evidence is not needed before acting. Awaab's Law already sets fixed timescales for social landlords, and the government is consulting from 9 October to 18 December 2026 on extending it to private rented homes in England.

In Scotland, from 6 October 2026, landlords must have reports of damp or mould investigated within 10 working days and start repair work on substantial damp or mould within 5 working days of the investigation ending.

Example

A tenant sends photos of mould around a bedroom window. The landlord inspects within days, finds a broken extractor fan and blocked trickle vents, fixes both, treats the mould, and checks again six weeks later to make sure it has not come back.

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