Damp, Mould and Condensation: Landlord Responsibilities and Evidence in England

A landlord's duty on damp and mould in England comes mainly from section 11 of the Landlord and Tenant Act 1985, which requires the structure, exterior and key installations to be kept in repair, and from the Homes (Fitness for Human Habitation) Act 2018, which gives tenants a direct right to sue if the home is unfit. Under the Housing Health and Safety Rating System (HHSRS), a damp or mould hazard scoring 1,000 or more is a Category 1 hazard - the most serious tier - and the local council then has a legal duty, not just a power, to act. There is no single fixed "repair deadline" for damp and mould in general; timescales only attach once a formal enforcement notice has been served or a court claim is under way.

This is general information about the law of England, not legal advice on your specific situation. Always check the current text on legislation.gov.uk and gov.uk guidance, or take independent advice, before acting on a live damp or mould complaint.

Key takeaways

• Section 11 LTA 1985 is the backbone duty. It obliges the landlord to keep the structure, exterior, and installations for water, gas, electricity, heating and hot water in repair and working order - many damp problems trace back to a breach of this duty (a leaking roof, defective guttering, or a failed heating system).
• HHSRS categories still decide enforcement, not the risk bands. A hazard scoring 1,000 or more is Category 1 (High risk) and the council must act; a hazard scoring below 1,000 is Category 2 - Medium risk (a score of 100 to 999) or Low risk (a score under 100) - and the council may act. The bands describe the score - they did not replace the category 1/2 legal duty-versus-power distinction.
• There is no blanket statutory fix-it deadline for damp and mould. Deadlines only appear once a council serves a specific enforcement notice (for example, at least 28 days before work must start under an improvement notice) or a tenant issues court proceedings.
• A council can add a civil penalty of up to £7,000 on top of Category 1 enforcement action - but only when it first takes that action, only where it was reasonably practicable for the landlord to have removed the hazard, and never for the common parts of a block of flats.
• Awaab's Law does not yet apply to private landlords, though the power to extend it is already law. It is a social housing duty under the Social Housing (Regulation) Act 2023, in force for social landlords since 27 October 2025. The Renters' Rights Act 2025 has inserted the mechanism to extend it to the private rented sector, but the implementing regulations have not been made and no commencement date has been confirmed.
• Government guidance rejects "lifestyle" as an explanation. Landlords who assume tenant behaviour is the root cause without investigating building deficiencies, ventilation and heating are taking on unnecessary legal risk.
• Evidence is the difference between a manageable complaint and an enforcement visit. Inspection records, photographs, correspondence and contractor reports are what a landlord actually relies on to show they responded properly.

Where the legal duty comes from

Section 11 of the Landlord and Tenant Act 1985 implies a covenant into most tenancies of under seven years - including virtually every assured shorthold tenancy - requiring the landlord to keep in repair the structure and exterior of the property (including drains, gutters and external pipes) and to keep in repair and proper working order the installations for water, gas, electricity, sanitation, space heating and water heating. Many damp problems are, at root, a section 11 issue: a defective roof or gutter letting in rainwater, a broken extractor fan, or a heating system too weak to keep rooms warm enough to avoid condensation.

The Homes (Fitness for Human Habitation) Act 2018 works alongside section 11. It inserted section 9A into the Landlord and Tenant Act 1985, implying a covenant that the dwelling is fit for human habitation both when the tenancy starts and throughout its term. Critically, this gives the tenant a direct route to court - they do not need to wait for the council to act. If a court decides a property is unfit (which, under section 10 of the 1985 Act, includes taking into account a serious problem with damp and any HHSRS-prescribed hazard), it can order the landlord to carry out works and/or pay uncapped compensation, assessed by the judge on the facts. A landlord only becomes liable once they are made aware of the problem, and then has a reasonable time - assessed on the circumstances - to deal with it.

How HHSRS actually scores damp and mould

HHSRS, set out under Part 1 of the Housing Act 2004, is the framework local councils use to assess housing conditions. Damp and mould is one of 21 hazards currently assessed (reduced from 29 under the Housing Health and Safety Rating System (England) (Amendment) Regulations 2026, in force from 23 June 2026). Each hazard is scored separately based on the likelihood of harm over the next 12 months and the potential severity of that harm.

The scoring produces two things that are often confused with each other:

• A risk band - High, Medium or Low - which simply describes how serious the score is.
• A legal category - Category 1 or Category 2 - which determines what the council must or may do.

According to the current landlord and agent guide to HHSRS, a hazard scoring 1,000 or more is High risk and is a Category 1 hazard; the council then has a legal duty to take enforcement action. A hazard scoring below 1,000 is Category 2, subdivided into Medium risk (a score of 100 to 999) and Low risk (a score under 100); here the council has a discretionary power, not a duty, to act. A single property can carry a mix of Category 1 and Category 2 hazards at the same time, because every hazard - damp and mould, excess cold, fire and explosions, structural collapse and falling elements, and so on - is scored on its own. Fire and explosions is treated as one combined hazard; structural collapse and falling elements is scored as a separate, standalone hazard.

Enforcement tools available to a council for a Category 1 hazard include a hazard awareness notice, an improvement notice, a prohibition order, and - where there is an imminent risk of serious harm - emergency remedial action or an emergency prohibition order. An improvement notice must allow at least 28 days before work has to start, and states the date by which it must finish; non-compliance is a criminal offence and can also trigger a rent repayment order, licensing consequences, or inclusion on the database of rogue landlords and property agents.

Civil penalties: what section 6A actually does

Section 6A of the Housing Act 2004 - inserted by the Renters' Rights Act 2025 and in force since 22 June 2026 - gives local councils an additional option specifically for Category 1 hazards. When a council first takes one of its enforcement actions (such as serving an improvement notice or a prohibition order) on a Category 1 hazard at qualifying residential premises (other than the common parts of a building containing flats), it may also impose a civil penalty of up to £7,000 on the "responsible person" - the penalty can accompany that first enforcement step, rather than only follow a later breach of it. The "reasonably practicable" test is not a defence for the landlord to raise: it is a precondition on the council's own opinion. The council may only impose the penalty if it considers it would have been reasonably practicable for the responsible person to have secured removal of the hazard and they failed to do so; a landlord who disagrees with that assessment, or with the level of penalty set, can appeal to the First-tier Tribunal.

This is separate from the power in section 249A of the Housing Act 2004, which lets a council impose a financial penalty as an alternative to prosecution for a range of housing offences, including the section 30 offence of failing to comply with an improvement notice - if the council goes down that route, the landlord cannot then also be prosecuted for the same conduct, and vice versa. This is a single power, not two: under section 249A(3), only one financial penalty under that section may be imposed on a person for the same conduct, and under section 249A(5) the council cannot impose a penalty where the person has already been convicted of the offence or where a prosecution for it is already under way and unresolved. The cap for a section 249A penalty was raised from £30,000 to £40,000 with effect from 1 May 2026 (by regulations made under section 249A(8)). Landlords should not treat this as a separate £40,000 power layered on top of Category 1 enforcement - it is the general financial-penalty-as-alternative-to-prosecution power under section 249A, with its own trigger and its own test, sitting alongside, not stacked on, the section 6A civil penalty for Category 1 hazards.

Awaab's Law: social housing only, for now

Awaab's Law was introduced for social housing by the Social Housing (Regulation) Act 2023, named after Awaab Ishak, a two-year-old who died in 2020 following prolonged exposure to mould in a social housing flat. Its first phase - requiring social landlords to repair all emergency hazards within 24 hours and to fix dangerous damp and mould within fixed timescales - came into force for the social rented sector on 27 October 2025.

The Renters' Rights Act 2025 has already legislated to extend Awaab's Law to the private rented sector: once the necessary regulations are made, it will imply Awaab's-Law-style timescale requirements into private tenancy agreements, giving tenants a route to court for breach of contract if a landlord fails to meet them, alongside the new Private Rented Sector Landlord Ombudsman as a further complaints route. What is outstanding is not whether this will happen, but how and when. Government guidance on the Renters' Rights Act confirms it will consult on how best to apply Awaab's Law to the private rented sector, recognising differences between the social and private sectors, and will set out further detail in due course. As of August 2026, no regulations have been made and no commencement date has been confirmed for private landlords. Private landlords should not treat Awaab's Law timescales as a current legal requirement, but the direction of travel - now backed by an enacted power, not just a policy intention - makes prompt, well-documented handling of damp and mould reports sensible practice regardless.

England only: Wales has a separate regime

This page describes England law - the HHSRS scoring system, section 6A, and the enforcement changes referenced here apply in England only. Landlords with property in Wales are instead subject to sections 91 and 92 of the Renting Homes (Wales) Act 2016. These are "fundamental provisions", automatically incorporated as terms of secure contracts, periodic standard contracts, and fixed-term standard contracts of under seven years - not every type of occupation contract - requiring the dwelling to be fit for human habitation and kept in repair, backed by the Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022. The detail of the Welsh regime is outside the scope of this page and should be checked separately.

What the guidance says about "lifestyle" and re-inspection

Government guidance on the health risks of damp and mould, most recently updated 1 April 2026, is direct on causation: it states it is "totally unreasonable" to blame damp and mould on tenants' lifestyle choices, and that everyday activities such as cooking, bathing and drying laundry inevitably produce indoor moisture. The guidance identifies the underlying causes as usually being building deficiencies, inadequate ventilation, inadequate heating, or poor energy efficiency - not normal domestic activity. Landlords can still work constructively with tenants on small, reasonable behavioural adjustments, but this must sit alongside, never instead of, fixing the root cause.

On following up, the same guidance recommends allowing at least six weeks after remedial work before revisiting the property to check the treatment has worked, with further investigation if damp or mould reappears. Any issues a tenant reports in the meantime should be actioned promptly, not left until that check-up visit.

Evidence: what protects a landlord

If a damp or mould complaint escalates - to an HHSRS inspection, a Homes (Fitness for Human Habitation) Act 2018 claim, or an insurance dispute - the landlord's position depends heavily on what they can show, not just what they did. Useful evidence includes:

• A dated, detailed inventory or schedule of condition from the start of the tenancy, ideally with photographs, so later damage or deterioration can be measured against a baseline.
• Dated photographs and notes from every inspection and every visit prompted by a tenant report.
• Copies of all tenant correspondence about damp, mould or condensation, including how quickly the landlord responded.
• Contractor, damp-surveyor, or heating engineer reports identifying the cause and the remedial work carried out.
• Records of gas safety checks, electrical safety checks and ventilation servicing, since a failing installation is often the underlying cause.
• A record of the follow-up inspection after remedial work, showing whether the issue recurred.

Common landlord mistakes

• Treating "it's condensation, not disrepair" as the end of the enquiry. Condensation is frequently a symptom of inadequate heating or ventilation, both of which fall within the landlord's repairing obligations - dismissing a report without investigating the cause is a common and risky mistake.
• Waiting for a formal notice before acting. The section 11 obligation and the section 9A fitness covenant both bite once the landlord is aware of the problem, not once a council notice arrives.
• Assuming a Category 2 finding means no risk. Category 2 hazards are still hazards; a council can still act, and an unresolved Category 2 issue can deteriorate into Category 1.
• Confusing the £7,000 section 6A penalty with prosecution or the section 249A route. They have different triggers, different tests, and are not simply interchangeable or automatically cumulative.
• Not keeping dated records. Verbal assurances and undated photographs are far weaker evidence than a proper inventory, schedule of condition, and a paper trail of correspondence and contractor reports.
• Applying Awaab's Law timescales as if they were already a private sector duty. They are not, as of August 2026 - though documenting prompt action is good practice regardless.

Sources and further reading

This page draws on section 11 of the Landlord and Tenant Act 1985, the Homes (Fitness for Human Habitation) Act 2018, the current landlord and agent guide to HHSRS, and government guidance on the health risks of damp and mould, alongside the Housing Act 2004 and the Renting Homes (Wales) Act 2016 for the Welsh comparison. For the wider fitness-for-habitation framework see our guide to the Homes (Fitness for Human Habitation) Act 2018, and for the paperwork that protects a landlord when a complaint arises see inventories and schedules of condition.

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Reviewed by Bradley Askew, Solicitor (non-practising), England & Wales. Reviewed 26 August 2026. This is general information, not legal advice for your specific circumstances - for advice on your situation, take independent legal advice.