A practical guide for tenants in England: what causes it, what your landlord must do, how to report it, and how to clean it without making things worse.
Last updated: 18 October 2026
If you have mould right now: report it to your landlord in writing today, with dated photos of every affected wall, ceiling and window. Keep a copy. If nothing happens, ask your council’s environmental health team to inspect. Do not stop paying rent to force a repair.
Black mould is one of the most common complaints in rented housing, and one of the most misunderstood. It is not simply a cleaning problem, and it is rarely caused by a tenant being dirty. It is a moisture problem. Until the moisture source is fixed, the mould will come back, no matter how many times you wipe it down.
This guide covers the law in England, the health evidence, the practical steps that work, and the mistakes that make the problem worse. It uses the UK spelling “mould”; if you are searching with the US spelling “mold”, you are in the right place.
Why black mould appears in rented homes
Mould needs three things: moisture, a surface to grow on, and time. In a rented home, the moisture usually comes from one of three sources.
Condensation is the most common. Warm, moist air hits a cold surface, such as a window, an external wall or a ceiling corner, and the water condenses. Bathrooms, kitchens and bedrooms are the usual suspects. Drying laundry indoors, cooking without an extractor fan and keeping windows shut in winter all add water vapour to the air.
Penetrating damp comes from outside: a leaking roof, cracked render, blocked gutters, failed seals around windows or plumbing leaks inside a wall. The patch often grows after rain and may have a tide mark.
Rising damp is less common and comes up from the ground through a failed or missing damp-proof course. It usually affects the bottom metre of a ground-floor wall and often brings a white salt deposit with it.
The private rented sector has a particular problem. The English Housing Survey 2024-25 found that 1.4 million dwellings in England, 5% of the stock, had a problem with damp in 2024. Damp affected 10% of private rented homes, compared with 7% of social rented homes and 4% of owner-occupied homes. The survey also notes that dangerous damp and mould levels have stayed high since the pandemic.
Landlords sometimes blame “tenant lifestyle”. The government’s own guidance for landlords and housing providers is clear that damp and mould should not be dismissed as a lifestyle issue. Cooking, washing and breathing all produce moisture. A home without adequate ventilation and heating will grow mould even when the tenant does everything reasonably expected of them.
What black mould does to your health
Mould produces spores and sometimes allergens and irritants. Inhaling them can cause sneezing, a runny nose, red or itchy eyes, a cough and skin irritation. For people with asthma, damp and mould can trigger attacks and make symptoms harder to control.
The World Health Organization’s guidelines on dampness and mould conclude that indoor dampness is associated with asthma, wheezing, coughing, respiratory infections and allergic rhinitis. The WHO also notes that there is no safe exposure threshold for microbial contamination, which is why the answer is to remove the moisture source, not just to measure the mould.
Some people are at higher risk: babies and young children, older people, pregnant women, people with asthma or COPD, and anyone with a weakened immune system. If you or someone in your household has ongoing respiratory symptoms, speak to a GP and mention the mould in your home. Take dated photos with you.
Not every black mark is the so-called “toxic black mould” that headlines warn about. Several common species look similar. The practical response is the same: treat it as a moisture and health problem, and get rid of the cause.
Is it actually black mould?
Look for small black or dark green spots, often in clusters, along window frames, in corners, behind furniture or on grout. A musty, earthy smell is a strong sign. If the marks smear when you wipe them with a damp cloth, that is consistent with mould rather than dirt or soot.
Mould often grows where air does not move: behind a wardrobe, under a bed pushed against an external wall, inside a cupboard on a cold wall, or along the silicone seal in a bathroom. It can also grow on fabric, leather, paper and cardboard.
Your rights as a tenant in England
The legal position has changed significantly in the last few years, and much of the advice online is out of date.
Fitness for human habitation. The Homes (Fitness for Human Habitation) Act 2018 inserted sections 9A to 9C into the Landlord and Tenant Act 1985. It implies a term into most tenancies that the home must be fit for human habitation at the start of the tenancy and stay that way. A home is not fit if it has a hazard that is serious enough to affect health or safety, and damp and mould can qualify. You can take your landlord to the county court directly, without waiting for the council to act. The court can order repairs and award compensation.
Section 11 repairs. Section 11 of the Landlord and Tenant Act 1985 requires the landlord to keep the structure and exterior in repair, along with installations for water, gas, electricity, sanitation, heating and ventilation. Condensation alone can be harder to fit into section 11, but where mould is linked to a defective roof, failed damp-proof course, leaking pipe or inadequate ventilation, the repairing duty is engaged.
HHSRS and council enforcement. Councils assess housing hazards under the Housing Health and Safety Rating System, introduced by the Housing Act 2004. Damp and mould is one of the hazards they score. If a council inspector finds a Category 1 hazard, the council has a duty to take enforcement action. That can mean an improvement notice with a deadline, a hazard awareness notice, or emergency remedial action where the council does the work and bills the landlord.
Awaab’s Law. Awaab’s Law sets legal deadlines for social landlords to investigate and fix significant damp and mould hazards. It has been in force for social housing in England since October 2025, with further phases planned. As of October 2026 it does not yet apply to private landlords. The government opened a consultation on extending it to private rented tenancies on 9 October 2026, closing on 18 December 2026, and the new rules will need secondary legislation before they take effect. Be sceptical of any article that says private landlords are already bound by Awaab’s Law deadlines. They are not, yet. Their existing duties under the 1985 Act and the HHSRS still apply.
No-fault eviction. Section 21 “no fault” evictions were abolished under the Renters’ Rights Act 2025, with the change taking effect on 1 May 2026. A transitional period for notices already served ended on 31 July 2026. Landlords must now use grounds-based section 8 possession. Complaining about mould is not a ground for possession, and retaliatory eviction protections remain important. If you receive an eviction notice after raising a repair complaint, get advice immediately from Shelter or a solicitor.
Withholding rent. Shelter and Citizens Advice both advise against withholding rent because of mould. Rent and repairs are separate obligations. Falling into arrears gives the landlord a route to possession and can damage your position. Report the problem, escalate it, and ask for compensation or a rent reduction through the proper process instead.
Scotland, Wales and Northern Ireland have different regimes. In Scotland the repairing standard applies and disputes go to the First-tier Tribunal. In Wales the Renting Homes (Wales) Act 2016 sets fitness requirements. In Northern Ireland the Private Tenancies Act (Northern Ireland) 2022 applies. The rest of this guide focuses on England.
How to report mould to your landlord
Report it in writing, even if you have already mentioned it on the phone. A paper trail matters if the problem escalates.
Include:
- The date you first noticed the mould, and the date of every photo.
- The rooms and surfaces affected, with approximate sizes.
- Any visible cause, such as a leaking gutter, condensation on windows or a damp patch after rain.
- Any health effects in the household.
- A clear request: inspect and fix the cause, not just repaint the surface.
- A reasonable deadline, for example 14 days for a non-emergency response.
Keep copies of emails and take screenshots of any web-form complaints. If you speak on the phone, follow up with an email summarising what was said.
Template email
Subject: Damp and mould at [address] – repair request
Dear [landlord or agent],
I am writing to report damp and black mould at [address]. I first noticed it on [date] in [room]. The affected area is approximately [size] and there is [describe: condensation, water ingress, leaking pipe, damp patch].
I have attached dated photographs. The mould is affecting [health issue, if relevant].
Please inspect the property and address the underlying cause, not just the visible mould. Please confirm within 14 days when an inspection will take place and what repairs are planned.
I am keeping a record of all correspondence.
Yours sincerely,
[Name]
If your landlord ignores you
Send one reminder with a deadline. If there is still no response, you have several routes.
Ask the council to inspect. Contact your local council’s environmental health or private rented housing team. They can assess the property under HHSRS and require the landlord to act. Councils vary in speed, so keep pushing and keep records.
Make a formal complaint. For social housing, use the landlord’s complaints process and then the Housing Ombudsman. For private renting, the council and the courts are the main routes.
Consider a county court claim. Under the fitness for human habitation provisions you can claim for repairs and compensation. This is usually done with advice from a solicitor or an advice agency. Evidence matters: photos, correspondence, medical records and any expert report.
Do not stop paying rent. If you are struggling financially because of the situation, ask for advice about a rent reduction or compensation rather than unilateral withholding.
How to clean black mould safely
Small patches caused by condensation can usually be dealt with yourself. Larger areas, or mould linked to a structural problem, should be handled by the landlord or a professional.
Before you start:
- Wear gloves, eye protection and a suitable mask. A basic cloth face covering is not enough for spores.
- Open a window and keep the room ventilated.
- Keep children and pets out of the room.
- Do not dry brush or vacuum the mould. That sends spores into the air and spreads the problem.
Cleaning:
- Use a fungicidal wash or a mould remover designed for the surface. Follow the product instructions, including dwell time.
- Test on a small hidden area first, especially on painted or coloured surfaces.
- Wipe gently with a damp, disposable cloth rather than scrubbing hard.
- Double bag the cloths and any disposable protective equipment and put them in the general waste.
- Wash your hands and clothes afterwards.
What not to do:
- Do not use ordinary bleach on porous surfaces such as plaster, plasterboard, wallpaper or bare timber. Bleach can lighten the surface while the moisture and fungal roots remain deeper in the material.
- Do not paint over mould with ordinary paint. It will come back through.
- Do not assume the job is done when the black marks disappear. If the wall stays damp, the mould will return.
If the affected area is larger than about one square metre, keeps returning, or is linked to a leak or structural defect, stop and ask the landlord to arrange professional remediation. Porous materials may need to be removed and replaced rather than cleaned.
How to stop mould coming back
Cleaning without fixing the moisture is a temporary fix. These steps make a real difference.
Ventilate every day. Open windows for a few minutes in the morning and evening, even in winter. Use extractor fans when cooking and showering, and leave them running for 10 to 15 minutes afterwards. Do not block air bricks or trickle vents.
Keep the home warm enough. A steady background temperature is better than short bursts of high heat. Cold surfaces attract condensation.
Dry laundry carefully. Drying clothes indoors without ventilation adds a lot of moisture. Use a tumble dryer vented outside, a condenser dryer, or a well-ventilated room with the door closed.
Give furniture room to breathe. Leave a gap of at least 5 to 10 cm between furniture and external walls. Pull beds and wardrobes away from cold walls.
Watch humidity. A cheap hygrometer can help. Aim for roughly 40% to 60% relative humidity indoors. A dehumidifier can help in a flat, but it is not a substitute for fixing a leak or improving ventilation.
Clean condensation promptly. Wipe windows and sills daily in cold weather. Deal with small patches before they spread.
When to consider moving out
Moving is a last resort, and it is rarely quick or cheap. But there are situations where staying is not reasonable, particularly where a child or vulnerable adult is affected and the landlord will not act.
Before you leave:
- Gather evidence: dated photos, correspondence, medical records and any council inspection reports.
- Check your tenancy agreement and get advice on ending it early.
- Protect your deposit: make sure it is protected in a government-approved scheme and document the condition of the property when you leave.
- Ask the council about your housing options if you are at risk of homelessness.
Do not simply stop paying rent and leave without notice. That can create arrears and make it harder to recover your deposit.
Frequently asked questions
Can I withhold rent because of black mould?
No. Shelter and Citizens Advice advise against it. Rent and repairs are separate legal obligations, and arrears can give the landlord grounds for possession. Report the mould, escalate it and seek compensation through the proper process.
Can my landlord evict me for reporting mould?
Section 21 no-fault evictions were abolished in England on 1 May 2026. Your landlord must use a grounds-based section 8 route. Complaining about repairs is not a lawful ground for possession, and retaliatory eviction protections apply. Get advice immediately if you receive a notice after complaining.
Is black mould a landlord’s responsibility?
Usually, yes, where it is caused by a defect in the property, inadequate ventilation or a failure to repair. The landlord must keep the structure, exterior and installations in repair, and the home must be fit for human habitation.
How long does a landlord have to fix mould?
There is no single deadline for private landlords in England yet. Awaab’s Law sets timescales for social housing and is being consulted on for the private rented sector, with the consultation closing on 18 December 2026. For now, a reasonable deadline in writing, followed by council enforcement, is the practical route.
Does black mould make a house uninhabitable?
It can, in serious cases, particularly where there is extensive contamination and a vulnerable occupant. Whether a home is legally unfit depends on the hazard and its severity. A council inspection or a solicitor’s advice is the best way to establish this.
Is black mould dangerous to sleep in?
Sleeping in a room with significant mould can worsen asthma and allergies, and prolonged exposure is associated with respiratory symptoms. Move sleepers out of the affected room where possible and get the cause fixed.
Does bleach kill black mould?
Bleach can lighten mould on hard, non-porous surfaces, but it does not reliably kill the roots in porous materials and it does not fix the moisture. Use a product designed for mould remediation and treat the underlying damp.
Can I claim compensation for mould in a rental?
Yes, compensation is possible, particularly where the landlord has failed to act on a hazard. Claims are usually made through the county court, sometimes alongside a repairs claim. Gather evidence and get legal advice before starting.
Sources and further reading
- English Housing Survey 2024-25, headline findings on housing quality and energy efficiency, GOV.UK: https://www.gov.uk/government/statistics/chapters-for-english-housing-survey-2024-to-2025-headline-findings-on-housing-quality-and-energy-efficiency/introduction-and-key-findings
- Guide for tenants, Homes (Fitness for Human Habitation) Act 2018, GOV.UK: https://www.gov.uk/government/publications/homes-fitness-for-human-habitation-act-2018/guide-for-tenants-homes-fitness-for-human-habitation-act-2018
- Extending Awaab’s Law to private rented tenancies and licences, consultation, GOV.UK: https://www.gov.uk/government/consultations/extending-awaabs-law-to-private-rented-tenancies-and-to-licences
- Guide to the Renters’ Rights Act, GOV.UK: https://www.gov.uk/government/publications/guide-to-the-renters-rights-act/guide-to-the-renters-rights-act
- Damp and mould: understanding and addressing the health risks for rented housing providers, GOV.UK: https://www.gov.uk/government/publications/damp-and-mould-understanding-and-addressing-the-health-risks-for-rented-housing-providers
- Shelter England, repairs and fitness for habitation: https://england.shelter.org.uk/housing_advice/repairs
- WHO guidelines for indoor air quality: dampness and mould: https://www.who.int/publications/i/item/9789289041683
- NHS asthma advice: https://www.nhs.uk/conditions/asthma/
This article is general information, not legal advice. If you are in a dispute with your landlord, contact Shelter, Citizens Advice or a solicitor.
It’s outrageous that over half a million rental homes are infested with black mould, putting the health of vulnerable individuals like Aziyah at risk. How can we expect them to thrive in such toxic environments? It’s time for local authorities and private landlords to take responsibility and actually do something about it.”
Funny comment: “I guess you could say it’s a ‘mouldy’ situation. Seriously though, this is getting out of hand. When will our leaders realize that neglecting the housing crisis is not only harming tenants but also perpetuating poverty and inequality?”
Empathy-driven comment with a personal touch: As someone who’s worked in social housing for years, I can attest to the devastating impact of black mould on families like Sinead’s. The feeling of helplessness she describes is all too common among tenants who are caught between bureaucratic red tape and unscrupulous landlords. It’s heartbreaking to see young children like Aziyah suffer from asthma due to prolonged exposure to toxic air. I implore the government and local authorities to take immediate action, not just with the Renters Rights Bill, but also by increasing funding for council housing and enforcing regulations on private landlords. We can’t just talk about it; we have to do something about it.
Question-provoking comment: How do you think the government’s Renters Rights Bill will be effective in addressing the black mould crisis if local authorities are already overwhelmed with complaints and lack the resources to take action? Can we rely on legislation alone, or does this bill mark a turning point for real change?
It’s heartbreaking to read about the black mould epidemic in rental homes, especially with today’s news highlighting how governments are grappling with larger economic issues, possibly diverting attention from urgent housing conditions. Have we reached a point where public health in housing might be overlooked amidst broader political agendas?
Are you kidding me? This article hits way too close to home. I’ve seen firsthand the devastating impact of black mould on families, particularly those with young children and vulnerable individuals like the elderly. The fact that over 570,000 complaints were received but only 1% resulted in prosecution is a staggering failure of local authorities. It’s not just about the health risks – it’s about the complete lack of empathy for these families who are being forced to live in toxic conditions. Can we please hold our politicians and local authorities accountable for this crisis? Where is the transparency and action?
The truth is shrouded in mystery, but one thing is certain – the neglect of these toxic rental homes is a glaring example of systemic failure. @Anthony, I understand your outrage, but let’s not forget the bigger picture. Today, the EU and Central Asia are taking ‘tentative steps closer’ amidst global turmoil. Yet, here at home, we’re still grappling with a crisis that’s been decades in the making. As someone who’s witnessed the intersection of politics and people’s lives, I believe it’s crucial to question the ‘accountability’ of our politicians. Are they truly committed to change, or is it just a facade? The 1% prosecution rate is indeed staggering, but what’s even more unsettling is the lack of concrete action. I’m not convinced that simply ‘holding them accountable’ will suffice. We need to unearth the root causes of this crisis, and I suspect it’s more complex than just ‘lack of empathy’. The clock is ticking, and the lives affected by black mould won’t wait.
Thank you for this article it’s so refreshing to see how perfectly aligned the government is with the black mould epidemic. Who needs clean air when we can all just breathe in toxic spores? I’m grateful that politicians are so proactive, even though only 1% of them face consequences for their negligence. I once lived in a house where the walls were made of bread and cheese turns out, that’s the ideal environment for mould! Why do we even need building regulations when nature has already solved everything?
Has anyone tried suing the moon for not providing better ventilation?