Damp and Mould: Landlord Duties, Complaints and Prevention
This article explores damp and mould in rental properties, including legal obligations, how to handle tenant complaints and prevention.
20/07/2026By Sunil Chander · Co-Founder
This article explores damp and mould in rental properties, including legal obligations, how to handle tenant complaints and prevention.
Damp and mould are a contentious issue in the private rented sector, and also among the most legally significant. What might appear to be a cosmetic inconvenience can, if left unaddressed, constitute a serious breach of a landlord's statutory obligations and lead to enforcement action, compensation claims and reputational damage. Understanding the legal framework and the standards expected of landlords is essential for anyone letting residential property.
Understanding your legal duties
The legal framework governing landlord responsibility with damp and mould draws on several interlocking pieces of legislation. Under section 11 of the Landlord and Tenant Act 1985, landlords have a statutory duty to keep in repair the structure and exterior of the dwelling, and landlords have a further duty under the Homes (Fitness for Human Habitation) Act 2018 to ensure that their properties are fit for human habitation throughout the tenancy, with freedom from damp forming part of that assessment.
Damp and mould growth is also a defined hazard under the Housing Health and Safety Rating System, which local authorities use to assess risks to the health and safety of occupants, and it may constitute a statutory nuisance under the Environmental Protection Act 1990 if it seriously affects a tenant's health, giving local authorities the power to serve abatement notices on landlords.
The most significant recent development is Awaab's Law, which came into force in October 2025, requiring social landlords to investigate and fix damp and mould hazards presenting a significant risk of harm within fixed timescales, and to address emergency repairs within 24 hours. While it currently applies to social housing, its standards are shaping expectations across the private rented sector. Crucially, irrespective of the type of damp involved, landlords are legally responsible for addressing damp and mould in their properties.
Condensation vs damp: Why the distinction matters
Understanding condensation vs damp is important when assessing where responsibility lies. Condensation occurs when moisture generated inside the home cools and condenses onto colder surfaces, such as window frames, corners and low points on walls behind furniture, and is the most common form of damp in rented properties. Penetrating damp happens when water enters from outside through gaps or defects in the building fabric, while rising damp is more common in older properties and generally affects the lower part of the ground floor up to approximately one metre in height.
Landlords may not assume that damp and mould result from a tenant's lifestyle without properly investigating the issue. Where penetrating or rising damp is identified, the structural remedy is the landlord's responsibility. Where condensation is the primary cause, landlords remain responsible for ensuring adequate heating and ventilation, and landlord damp proofing obligations also extend to maintaining any structural features designed to manage moisture.
Handling a mould complaint
When a tenant submits a mould complaint, how a landlord responds matters as much as what they ultimately do. A landlord may be deemed to be on notice of a problem even without formal written notification and a landlord who visits a property where widespread damp is present may be held to have known about it regardless of whether the tenant drew it to their attention explicitly.
Upon receiving a complaint, the landlord should acknowledge it promptly in writing, arrange an inspection without unnecessary delay, and maintain clear records of all communications and actions taken. A physical inspection is preferred over an assessment based on photographs alone, as the full extent of damp and mould cannot always be identified remotely. If the cause is unclear, a qualified damp surveyor should be engaged at the landlord's cost. Where housing disrepair caused by damp has damaged a tenant's belongings or affected their health, courts can order both remedial works and financial redress, making early action considerably less costly than delayed responses.
Prevention and evidence
Many cases of mould in rented property, particularly those driven by condensation, can be prevented through proactive measures. Landlords are responsible for ensuring that extractor fans, openable windows and, where required, mechanical ventilation systems are installed and functioning. Regular damp proofing maintenance landlords should undertake includes clearing guttering, repointing brickwork and renewing external render, preventing penetrating damp before it takes hold.
Landlords should also provide ventilation advice for tenants at the outset of a lease, covering extractor fan use, consistent heating during cold periods, and moisture management from cooking and bathing. Doing so helps establish shared prevention responsibilities. Landlords should not prohibit tenants from drying clothes indoors where the property has no outside space, and should instead consider practical solutions such as a dryer or dehumidifier. Note, however, that a dehumidifier does not discharge a landlord's legal obligations where underlying infrastructure is the problem.
Good record-keeping protects both parties. Simply removing surface mould will not prevent it from returning; landlords must identify and address all underlying sources of dampness, working with qualified professionals. Survey reports, repair logs, time-stamped photographs and written communications should all be retained as a compliance record.
Conclusion
Damp and mould impact landlord responsibility, tenant health and legal compliance. Landlords who respond promptly, investigate thoroughly and maintain clear records will be in a far stronger position than those who dismiss complaints or rely on surface remediation. For tenants, raising concerns in writing, providing photographic evidence and cooperating with access arrangements remains the most effective path to resolution. Approached in good faith by both parties, housing disrepair caused by damp need not escalate into costly legal proceedings.
FAQs
Q. What is a landlord's legal responsibility with damp and mould in a private rental property?
A. Landlords must ensure their properties are fit for human habitation throughout the tenancy under the Homes (Fitness for Human Habitation) Act 2018, and must keep the structure and exterior in good repair under the Landlord and Tenant Act 1985. Damp and mould are defined hazards under the Housing Health and Safety Rating System, and failure to address them following notification can result in enforcement action or court proceedings.
Q. What to expect with a mould complaint from a tenant?
A. A mould complaint letter should be sent in writing, preferably by email, describing the location and extent of the problem and including dated photographs. It should state when the issue was first noticed and request prompt investigation and repair. Retaining copies of all correspondence is essential if the matter escalates.
Q. What is the difference between condensation vs damp in a rental property?
A. Condensation is the most common form of damp and occurs when warm, moisture-laden air meets cold surfaces, producing water droplets and, over time, mould growth. Structural damp includes penetrating damp, caused by water entering through defects in the building's exterior, and rising damp, caused by groundwater moving upwards through porous masonry.
Q. Can a landlord blame the tenant for mould caused by condensation?
A. Not without evidence and a proper investigation, as government guidance makes clear that it is unacceptable to assume damp and mould result from a tenant's lifestyle. Where inadequate heating, ventilation or insulation is a contributing factor, the landlord is likely to bear responsibility for addressing those structural deficiencies.
Q. What does damp proofing involve and when is it required?
A. Damp proofing is a landlord's responsibility and covers structural measures such as installing or renewing a damp proof course, repointing external brickwork, renewing render, and maintaining guttering and downpipes. It is required wherever structural deficiencies are contributing to dampness, and the landlord is responsible for arranging and funding the work.
Q. Should landlords recommend dehumidifiers to tenants?
A. Recommending a dehumidifier as part of broader ventilation advice for tenants is a sensible practical measure, particularly where condensation is a seasonal concern. It is not, however, a substitute for ensuring the property has adequate heating and ventilation infrastructure in place.
Q. What constitutes housing disrepair caused by damp?
A. Housing disrepair caused by damp arises where structural deficiencies have produced substandard conditions, and the landlord has failed to remedy them within a reasonable period of notification. Tenants may claim compensation for damage to belongings, health impacts, and inconvenience, and courts can also order the landlord to carry out the necessary works.
Q. What ventilation advice for tenants should landlords provide at the start of a tenancy?
A. Landlords should provide written guidance on using extractor fans, keeping trickle vents open, heating the property consistently in cold weather, and managing moisture from cooking and bathing. Where the property has specific ventilation features, these should be explained clearly at the outset.
Q. What records should a landlord keep when dealing with a damp and mould complaint?
A. Landlords should retain all written communications with the tenant, along with contractor reports, surveyor findings, dated photographs and evidence of completed works. These documents form a compliance record that is essential if the matter proceeds to enforcement action or litigation.
Q. Does Awaab's Law apply to private landlords?
A. Awaab's Law came into force in October 2025 and currently applies specifically to social housing landlords, imposing fixed timescales for investigating and remedying damp and mould hazards. Private landlords remain bound by the Homes (Fitness for Human Habitation) Act 2018 and the Landlord and Tenant Act 1985, and the standards set by Awaab's Law are increasingly referenced as indicative of good practice across all tenures.
About the author
Sunil Chander
Co-Founder
Sunil oversees operations and compliance at Pauzible, drawing on his extensive experience as the founder and CEO of Dawnbud Limited, a financial services consulting firm. His prior career included senior roles in investment banking at Smith New Court and NatWest. He holds an MBA from LBS, M Litt from Oxford and a PhD from Cambridge.
damp and mouldlandlord dutiesproperty repairshousing standardsAwaab's Law
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