Damp and mould: landlord responsibilities explained
Damp and mould can arise from disrepair, poor ventilation or lifestyle factors, but landlords must investigate every report and cannot simply blame the tenant.
6 min read · Updated 2 August 2026
Overview
Damp and mould can arise from disrepair, poor ventilation or lifestyle factors, but landlords must investigate every report and cannot simply blame the tenant.
Types of damp
Rising damp, penetrating damp from disrepair, and condensation from inadequate ventilation each need a different fix.
Investigating a report
Inspect promptly, identify the likely cause, and do not assume condensation without checking the building fabric first.
Fixing the cause, not just symptoms
Mould wash treatments are a temporary measure; extractor fans, insulation or repairs to the building fabric address the underlying cause.
Timescales and records
Serious hazards should be treated urgently; keep the inspection report, any specialist survey and completion evidence together.
Frequently asked questions
Is mould always the landlord's fault?
No. If mould is caused by a defect such as a leak, failed damp course or inadequate ventilation, it is the landlord's to fix. If it is purely lifestyle condensation, the landlord should still advise and ensure ventilation works, but the tenant shares responsibility.
How quickly must I respond to a damp report?
Treat it as urgent. Inspect within days, record what you find with photographs, and start remedial work promptly. Councils can serve improvement notices where hazards are left unaddressed.
The RentDocs landlord update
Plain-English UK compliance changes, Renters' Rights Act 2025 updates and new guides — no spam, unsubscribe any time.
This guide is general information for UK landlords and letting agents, not legal advice. Rules differ across England, Wales, Scotland and Northern Ireland — check your local requirements or take advice before acting.