Damp and Mould in Rented Properties: A Landlord's Legal Responsibilities in 2026

If you are a landlord in England, your legal responsibility for damp and mould in rented properties has never been clearer or more strictly enforced. The introduction of Awaab's Law, combined with existing duties under the Homes (Fitness for Human Habitation) Act 2018 and the Housing Health and Safety Rating System (HHSRS), means that landlords who ignore or inadequately address mould face significant legal and financial consequences.

This guide sets out exactly what the law requires of landlords when it comes to damp and mould in rented property, the deadlines you must meet, and the practical steps you can take to stay compliant and protect your tenants' health.

Homes (Fitness for Human Habitation) Act 2018

Since March 2019, the Homes (Fitness for Human Habitation) Act 2018 has required all landlords, private and social, to ensure that their rental properties are fit for human habitation at the start of, and throughout, the tenancy. Damp and mould growth are explicitly listed as factors that can render a property unfit.

Under this Act, tenants can take their landlord to court without first going through the local authority. If the court finds the property is unfit, it can order the landlord to carry out repairs, pay compensation, or both.

Key points for landlords:

• ·The duty applies for the entire duration of the tenancy, not just at the start.
• ·You cannot contract out of this obligation: a clause in the tenancy agreement saying the tenant is responsible for damp does not override the Act.
• ·The tenant does not need to prove negligence. If the property is unfit due to damp or mould, you are liable.

The Housing Health and Safety Rating System (HHSRS)

Local authorities use the HHSRS to assess hazards in residential properties. Damp and mould growth is one of 29 hazards assessed under this system. If an environmental health officer identifies a Category 1 hazard (the most serious level), the local authority has a duty to take enforcement action.

For landlords, this can mean:

• ·Improvement notices requiring specific remedial work within a set timeframe.
• ·Prohibition orders preventing the use of part or all of the property.
• ·Emergency remedial action carried out by the council and charged to the landlord.
• ·Civil penalties of up to £30,000 per offence, or criminal prosecution in the most serious cases.

Damp and mould are frequently assessed as Category 1 hazards, particularly where vulnerable occupants such as children, elderly tenants, or those with respiratory conditions are present.

Awaab's Law: The New Deadline Framework

Awaab's Law was introduced following the death of two-year-old Awaab Ishak in Rochdale, who died from a respiratory condition caused by prolonged exposure to mould in his family's social housing flat. The law initially applies to registered social housing providers, with expectations that it will extend to the private rented sector.

The law sets mandatory timescales for responding to reports of damp and mould:

• ·Investigation: Landlords must investigate a reported hazard within 10 working days.
• ·Safety work: Where the investigation identifies a hazard, safety work must be completed within 5 working days of the investigation concluding.
• ·Emergencies: Where damp or mould presents an emergency risk to health, the landlord must act within 24 hours.

These are not guidelines. They are legal requirements with enforcement mechanisms. Social landlords who fail to meet these timescales face intervention from the Regulator of Social Housing and potential compensation claims from tenants.

Private landlords should pay close attention. The government has signalled its intention to extend similar timescale requirements to the private rented sector through the Renters' Rights Bill. Preparing now is both prudent and cost-effective.

For years, landlords commonly attributed mould to tenant behaviour: drying clothes indoors, insufficient ventilation, or not heating the property adequately. While tenant behaviour can contribute to condensation, this defence is increasingly failing in court and at ombudsman level.

The Housing Ombudsman's 2021 report, Spotlight on Damp and Mould, was unambiguous: landlords must stop taking a “defensive” approach and instead adopt a “zero tolerance” attitude to damp and mould. The report found that attributing mould to lifestyle without a proper investigation was a systemic failing across the sector.

Courts have echoed this position. In recent disrepair claims, judges have consistently held that landlords must investigate structural causes (rising damp, penetrating damp, inadequate insulation, poor ventilation design, and thermal bridging) before attributing mould to tenant behaviour.

For landlords, the practical takeaway is clear: when a tenant reports mould, you must investigate the cause professionally. If you do not, you are exposing yourself to legal liability.

1. Respond Promptly to Every Report

Log every report of damp or mould with a date and time. Even if the timescales in Awaab's Law do not yet apply to your property, demonstrating a prompt response is your best defence against a disrepair claim. Acknowledge the tenant's report in writing within 48 hours.

2. Investigate Properly: Do Not Guess

A proper investigation means identifying the source of moisture. This may require a professional damp survey, thermal imaging, or an assessment by a mould remediation specialist. Surface-level inspections that conclude “it's just condensation” without evidence are inadequate.

Trained mould remediation specialists understand the difference between condensation, penetrating damp, and rising damp. They can identify whether the issue is structural, mechanical (such as a failed extractor fan), or genuinely related to occupant behaviour, and provide documented evidence to support their findings.

You can find trained mould remediation specialists through the UKAME Directory, where all listed professionals have completed UKAME training courses delivered by an IICRC certified trainer.

3. Use Trained Professionals for Remediation

Mould remediation, the correct term for properly addressing mould contamination, is not the same as painting over mould with anti-mould paint or wiping it down with bleach. Professional remediation involves containment, removal of contaminated materials where necessary, treatment of affected surfaces, and addressing the underlying moisture source to prevent recurrence.

Using untrained contractors who simply paint over mould will result in the problem returning, repeat tenant complaints, and ultimately greater cost. It also leaves you legally exposed, because you have not genuinely remedied the hazard.

4. Document Everything

Keep records of:

• ·The date the tenant reported the issue
• ·Your acknowledgement and response
• ·The investigation carried out and its findings
• ·The remedial work completed, including who carried it out and their qualifications
• ·Any follow-up inspections

This documentation is essential if you face a disrepair claim, an HHSRS inspection, or a complaint to the Housing Ombudsman. It demonstrates that you took your landlord mould responsibility seriously and acted within a reasonable timeframe.

5. Address Root Causes, Not Symptoms

The most common reason mould returns after treatment is that the underlying cause was never fixed. If the property has inadequate ventilation, poor insulation, or a structural defect allowing water ingress, no amount of surface treatment will solve the problem permanently.

A trained specialist will not only remediate the existing mould but also advise on the root cause and recommend long-term solutions. This might include installing mechanical ventilation, improving insulation, or repairing building defects.

6. Consider Preventive Surveys

If you manage a portfolio of rental properties, particularly older housing stock, proactive damp and mould surveys can identify problems before tenants report them. This approach reduces your legal risk, improves tenant satisfaction, and is significantly cheaper than reactive remediation combined with disrepair claims.

The cost of ignoring your obligations as a landlord around damp and mould can be substantial:

• ·Disrepair claims regularly result in compensation awards of £5,000 to £30,000, plus legal costs.
• ·Civil penalties under the HHSRS can reach £30,000 per offence.
• ·Rent repayment orders allow tenants to reclaim up to 12 months' rent.
• ·Reputational damage affects your ability to attract and retain good tenants.

By contrast, professional mould remediation for a typical property costs a fraction of a single disrepair claim. Investing in trained specialists is not an expense. It is a risk management strategy.

UKAME is the UK's training and membership provider for mould remediation specialists. All professionals listed in the UKAME Directory have completed UKAME training courses delivered by an IICRC certified trainer, ensuring they have the knowledge and skills to carry out remediation work to a professional standard.

For landlords who need work done now: browse the UKAME Directory to find a trained specialist in your area, or post a job on the UKAME Job Board. It is free to post, and your listing will be seen by trained mould remediation professionals across the UK.

For landlords and letting agents who want to stay ahead of the law: understanding your obligations is the first step. Read our complete guide to Awaab's Law for further detail on compliance timescales and enforcement.