Is my landlord responsible for mould in my flat?

Direct answer

Almost always yes. Mould caused by leaks, poor insulation, defective heating, missing extractor fans, or other building problems is the landlord's responsibility under section 11 of the Landlord and Tenant Act 1985 and the Homes (Fitness for Human Habitation) Act 2018.

Related guidance inside this topic

• If your next step turns on legacy Section 21 notice rules, read Section 21 notice validity outcome guides.
• For the dates, forms, and evidence behind legacy Section 21 notice rules, see Section 21 notice checker before you respond.
• If this issue overlaps with section 13 rent increase rules, check rent increase checker to compare the legal tests.
• For a fuller breakdown of landlord repair duties, use housing repairs checker for the underlying rule set.
• If you need the route-specific rules on legacy Section 21 notice rules, start with Section 21 abolition guide so you can check the dates and documents against your own case.

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