Damp and Mould in Rented Homes: Duties, Deadlines and Evidence

Damp and mould in a rented home are not just a cosmetic problem: they are a repair issue that the law treats seriously, and since October 2025 social landlords in England have been under a statutory duty to investigate and resolve damp and mould within set time periods¹. Serious cases must be investigated within 10 working days of being reported¹. The problem is also widespread: the English Housing Survey for 2024 to 2025 found damp in 10% of private rented homes, 7% of social rented homes and 4% of owner occupied homes³.

What the law expects of your landlord depends on three things: which sector you rent in, what is causing the damp, and what you can show from your own record of the problem. A landlord is usually only responsible for repairing something once they become aware of it, so the single most important step is to report the damp straight away and in writing⁴. Once the landlord knows, repairs must be carried out in a reasonable time and to a reasonable standard⁵. This page explains the duties, the deadlines, the differences between the four nations, and how to build the evidence that decides most disputes.

Legal duties after a damp or mould report

The starting point is a simple one: a landlord must keep the dwelling in repair at all times, and once the landlord is aware of the need for repairs, they must be carried out in a reasonable time and to a reasonable standard⁵. That duty does not wait for the tenant to ask twice, and it does not depend on the landlord having caused the problem. It attaches to the structure and exterior of the building and to the installations in it.

The trigger is awareness. Citizens Advice is clear that a landlord is usually only responsible for repairing the problem when they become aware of it, so tenants should report the problem straight away⁴. This is why a verbal mention to a contractor or a passing comment in a corridor carries so little weight later: if the dispute ever reaches a tribunal, the question will be what the landlord knew and when. A written report, dated and kept, answers that question before it is asked.

For social tenants in England, the duty has been strengthened. From October 2025, Awaab's Law requires social landlords to investigate and resolve damp and mould in homes within set time periods². Independent advice for tenants states the position plainly: "Your social landlord has a duty to fix reported damp, mould and emergency repairs by law"¹. That duty sits alongside, not instead of, the general repair obligation.

Landlords also have duties before a tenancy even begins. In Northern Ireland, official guidance says that before letting a house to tenants, the landlord should ask a qualified surveyor to check the condition of the property, and in a property rented to tenants the landlord should make sure roof spaces are insulated, replace draughty, ill fitting windows and doors, draught proof external doors and windows (but not rooms containing an open-flue gas appliance), insulate exposed water pipes and fit the hot water tank with a good quality insulation jacket⁶. A home that lets out heat and resists moisture poorly is a home where condensation is far more likely, which is why these duties connect directly to the damp question. More broadly, landlords must give their tenants proof that they have had installations and equipment inspected, tested and checked⁷, a duty explored in detail on our page about landlord duties on energy, heating and home safety.

Awaab's Law: the deadlines that now bind social landlords

Awaab's Law came into force in October 2025 to ensure that everyone has access to a safe home¹. It applies to social landlords in England and requires them to investigate and resolve damp and mould within set time periods, with the strictest response times reserved for emergency hazards². The deadline most tenants will actually encounter is the investigation deadline: serious cases of damp and mould must be investigated within 10 working days of being reported¹.

What the timescales mean in practice is that the clock starts when the report is made, not when the landlord acknowledges it. That makes the date of your report the single most important fact in the whole process. A report made by phone should be confirmed in writing the same day, because ten working days is counted from the report being made¹.

The severity of the report matters too. The law distinguishes between emergency hazards, which carry the strictest response times, and serious damp and mould cases, which trigger the 10 working day investigation deadline¹. Describing the problem fully when you first report it, including any effect on your health or your family's health, helps the landlord classify it correctly. Our page on damp, mould and respiratory illness explains the health side of this in more detail.

For private tenants, these specific deadlines do not yet apply, but the underlying repair duty does: repairs must be carried out in a reasonable time and to a reasonable standard once the landlord is aware of the need⁵. The expansion of Awaab's Law, and what is still to come, is covered in the final section of this page.

Rules for social versus private tenants

The sector you rent in determines which rules protect you, and the differences between the four nations matter. In England, Awaab's Law applies to social landlords: if you rent from the council or a housing association, the landlord is responsible for the damp if it means the home is not safe to live in, or if it is an ongoing serious problem affecting your physical or mental health⁴. If you rent privately, your landlord might be responsible for the damp if it means your home is not safe for you to live in, for example if it has made you or your family ill⁴.

The scale of the problem differs by sector. The English Housing Survey 2024 to 2025 found damp was more prevalent in the private rented sector (10%) than in the owner occupied (4%) and social rented sectors (7%)³. So while social tenants have the stronger statutory deadlines, private tenants face the higher underlying rate of damp.

In Wales, the fitness for human habitation rules cover private, local authority and other public body landlords, as well as a tenant who sub-lets a property within scope⁸, and the landlord must keep the dwelling in repair at all times⁵. Our page on fitness for human habitation in Welsh rented homes covers the Welsh rules in full. In Scotland, the Repairing Standard sets the duties for rented homes, and new regulations mean that all houses in the private rented sector must meet the statutory tolerable standard⁹; our page on the Repairing Standard for rented homes in Scotland explains what that requires. In Northern Ireland, official guidance sets out the checks a landlord should make before and during a tenancy, including insulation and the condition of windows and doors⁶, and private tenancy landlords there must replace a smoke or carbon monoxide alarm when notified it is faulty¹⁰, a duty that sits alongside the general repair expectations.

If you are unsure which rules apply, start with who your landlord is: a landlord is anyone who rents out a property that they own under a lease that is shorter than 7 years or under a licence¹¹. Council and housing association tenants in England have the Awaab's Law deadlines; private tenants rely on the general repair duty and, increasingly, on sector specific standards. Our pages on social housing energy and the UK private rented sector set out the differences in more depth.

Why the damp type affects who must act

Damp comes in three main forms, and which one you have largely decides who has to fix it. Citizens Advice sets out the causes of each, and the pattern behind them is consistent: the more the damp stems from the building itself, the stronger the landlord's responsibility.

Penetrating damp gets in from outside through a building defect: a leaking roof, a cracked wall, leaking guttering or external pipes, a leaking drainage pipe, or rotten windows or doors⁴. Because a term implied into the tenancy agreement says the landlord must keep in repair the exterior and structure of the home, as well as installations like basins, sinks, baths, toilets and their pipework, the landlord is in many cases responsible for dealing with penetrating damp⁴.

Rising damp travels up from the ground and is more common in older properties⁴. Here too the implied repair term usually points to the landlord: in many cases the landlord is responsible because that term makes keeping the exterior and structure of the home in repair their responsibility⁴. And if there is a problem with an existing damp-proof course causing the damp, the landlord is likely to be responsible for repairing it⁴.

Condensation damp is the contested one, because it can be blamed on how the home is lived in. It forms where moisture in the air meets cold surfaces, and it can occur anywhere on a wall, may form at the base of a wall or from top to bottom, and can result in mould growth, damage to furniture and belongings and in some cases mite infestation⁴. The listed causes are telling: not having proper ventilation, not having good enough extraction fans in kitchens and bathrooms, broken heating systems such as a boiler not working properly, not having insulation on external walls or ceilings, and no suitable way to dry clothes⁴. Several of those are the landlord's fixtures and the landlord's repair duty, not the tenant's lifestyle.

The landlord will probably be responsible for condensation damp if the tenancy agreement says so, or says they will keep the home fit to live in, if the damp was caused by the landlord not making certain repairs such as heating or ventilation, or if the damp has caused damage the landlord has to repair, such as rotting window frames or damaged plasterwork⁴. There is also a construction edge case: if a design problem does not affect the structure or exterior or cause damage to the building, the landlord may not have a responsibility under the tenancy agreement to prevent the damp, but the landlord is responsible for repairs if a design problem causes damage to the building, for example to a wall or ceiling plaster⁴.

The building regulations point to the standard a home should meet: the performance criterion for moisture is that there should be no visible mould on external walls in a properly heated dwelling with typical moisture generation¹². In other words, mould that appears in a home that is properly heated and typically used points to a building problem, not a tenant problem. Our sub-pages on whether your landlord is responsible for rising damp, condensation damp and what causes condensation in a rented property take each cause in turn.

Recording proof and how it shapes your case

Most damp disputes are decided not by what happened but by what can be shown. The foundation is the report itself: a landlord is usually only responsible for repairing the problem when they become aware of it, so report the problem straight away⁴. A written report with a date establishes both the landlord's awareness and the start of any deadline.

From there, build a record in four parts:

1. The report and every response. Copies of every message sent and received, with dates. If you report by phone, follow up in writing the same day.
2. Photographs of the problem. Dated images of the damp and mould, showing where it is on the wall and how it changes over time. Condensation can occur anywhere on a wall and may form at the base of a wall or from top to bottom⁴, so photograph the whole affected area, not just the worst patch.
3. Evidence of the cause. Anything pointing to a building defect: a leaking roof, cracked wall, leaking guttering or external pipes, leaking drainage pipe, or rotten windows or doors⁴. These are penetrating damp causes, and they shift responsibility firmly to the landlord's repair duty.
4. Records the landlord holds. Landlords must give their tenants proof that they have had installations and equipment inspected, tested and checked⁷, and electrical installations in rented properties must be checked at least every 5 years⁷, so you can ask for the inspection report for your home. Gas safety records show a similar discipline: the record must include the date of the check, the premises address, the landlord's name and address, the description and location of the appliance or flue, the safety defects identified, the remedial action taken, the checker's name and signature, and their registration number with an approved body¹³. A landlord who keeps records this way for one duty but cannot show when a damp report was received is telling you something.

The standard the evidence should aim at is the moisture criterion in the building regulations: no visible mould on external walls in a properly heated dwelling with typical moisture generation¹². If your home is properly heated and typically used and mould is still growing, your record of heating use, alongside photographs of the mould, meets that test head on. Our page on what temperature your home should be in winter covers the health benchmark for heating.

Splitting responsibility between landlord and tenant

The landlord's duty is broad but not unlimited, and the boundary matters most with condensation. The causes listed for condensation damp include some that sit with the household: no suitable way to dry clothes is among them, alongside landlord-side causes such as broken heating systems, inadequate ventilation and missing insulation on external walls or ceilings⁴. A landlord who can show the home is properly heated, ventilated and insulated, and that clothes are dried indoors without extraction, has a genuine argument that the remaining moisture is generated by the household.

The design edge case marks another boundary: if a design problem does not affect the structure or exterior of the home or cause any damage to the building, the landlord may not have a responsibility under the tenancy agreement to prevent the damp⁴. The duty to repair is triggered by disrepair and damage, not by every imperfection in how a building was built.

The tenant also has a role in letting the work happen. The law recognises access for the purpose of carrying out work on the let property, including urgent access¹⁴, and a tenant who refuses reasonable access for repairs cannot then hold the landlord responsible for the delay. Cooperation and record keeping go together: allow the visits, and note in your record what was inspected and what was promised.

Finally, who counts as a landlord is itself defined: a landlord is anyone who rents out a property that they own under a lease that is shorter than 7 years or under a licence¹¹. If the person you deal with is an agent, the duty still sits with the owner, and your reports should be addressed in a way that reaches them. For the wider picture of what tenants can and cannot change in a rented home, see renting and home energy.

Taking complaints further

If reporting does not produce action, the routes beyond the landlord depend on where you live and what the dispute is about. In England and Wales, the First Tier Tribunal remains the main route that complaints and redress can be made for consumers in premises within the scope of the Landlord and Tenant Act 1985¹⁵. That covers a wide set of situations: premises where you pay for heating, cooling or hot water through rent or service charges, where you live on a property with a landlord, where you live in council or social housing with the local council as landlord, or where you live under a lease¹⁵.

Before escalating, the first contact is the person the household pays. Where energy is paid to a site owner or landlord, problems and complaints go to them first¹⁶. This matters for damp because heating and hot water are often part of the dispute: a broken heating system is a listed cause of condensation damp⁴, and where the landlord also supplies the energy, the complaint runs through them on both fronts.

For energy-related complaints that cannot be resolved directly, the Energy Ombudsman and Citizens Advice are the frontline organisations that handle escalated consumer complaints¹⁷. The same pattern applies to energy improvement work: complaints should be raised with the installer first, then with the installer's scheme provider, then with an alternative dispute resolution provider¹⁷. Our page on asking a landlord for energy improvements covers the consent side of that process.

Whatever route you take, the escalation will be built on the record described earlier: the dated report, the photographs, the evidence of the cause and the landlord's responses. A tribunal or ombudsman does not re-live the damp; it reads about it.

Sources of free support

Citizens Advice is the main free starting point. It covers consumers in England and Wales¹⁸ and offers information and support on a range of topics, including struggling to pay bills, problems with your energy supplier or supply, saving energy at home and getting a better energy deal¹⁹. For housing conditions and repairs specifically, its guidance on who is responsible for repairs, including damp, sets out the sector by sector position described on this page⁴.

The contact details:

Two numbers are published for Welsh language contact, 0808 223 1144 and 0800 702 2020, and they differ¹⁸; if one does not connect, try the other or the main line. Citizens Advice also operates as a frontline organisation for escalated consumer complaints alongside the Energy Ombudsman¹⁷.

Beyond Citizens Advice, the help available depends on the nation. In Northern Ireland, the official checking your home guidance sets out what a rented home should provide⁶. If damp is making your family ill, our page on what to do when damp in a rented home is making your family ill sets out the health evidence that strengthens a complaint, and cold homes and health covers the wider health picture. If the underlying problem is a cold, hard to heat home, fuel poverty in UK households explains the support that may be available.

Developments still under way

The rules are moving in one direction: towards firmer deadlines and wider coverage. Awaab's Law came into force in October 2025 covering damp, mould and emergency hazards¹, and it expands in phases. Phase 2 comes into effect on 30 November 2026 and extends the same immediate response times to further hazards, including electrical faults, risks of falling, structural defects, excess cold and heat, fire risks and pest infestations. Phase 3, in 2027, brings all remaining hazards under the Housing Health and Safety Rating System that present a significant risk of harm into scope, except overcrowding. Our page on the Housing Health and Safety Rating System and excess cold explains the hazard assessment that underpins this.

In Scotland, the Repairing Standard has been extended too: new regulations mean that all houses in the private rented sector must meet the statutory tolerable standard, and the new provisions other than the tolerable standard changes came into force from March 2024 to allow landlords time to carry out the necessary works⁹. Scotland is also consulting on energy efficiency rules for private rented homes under which a landlord of a sub-standard property must not let it, or part of it, on or after 1 April 2028 unless improvements are made or an exemption applies, with existing tenancies protected until 31 March 2033²⁰. Warmer, better insulated homes are less prone to condensation, so these standards bear directly on the damp question.

For private tenants in England, the open question is whether Awaab's Law reaches them. The Renters' Rights Act 2025 began commencing its provisions from May 2026, and our page on the Renters' Rights Act and home energy in England tracks what that means for private renters. Until then, the private sector duty rests on the general repair obligation: keep the dwelling in repair, and carry out repairs in a reasonable time and to a reasonable standard once aware⁵. The practical conclusion for any tenant, in any sector, is the same: report early, record everything, and know the deadline that applies to your home.