UK cost guide
How much does mould cleaning cost in the UK?
Professional mould cleaning is quoted per job. What moves the price is the area affected, the surface (paint, plaster, sealant, fabric), access and whether repainting is included. Ask for a written quote that separates cleaning from any treatment product being sold alongside it.
Mould cleaning is often sold as a fix. It is not. Cleaning removes the visible growth, but if the moisture that fed it is still there, the mould is back before the invoice clears. This guide separates useful cleaning from wasted cleaning.
Last updated Reviewed by Vincent Pamenter
Cost breakdown — UK 2026
Ask for an itemised written quote for your property. Confirm VAT, access, structural repairs and hazardous-material handling before agreeing to work.
What sets the price
DIY — small patch (<1 m²)
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Materials only: mould-safe cleaner, cloths, PPE, sealed bin bags.
DIY — medium area, redecoration
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Mould-safe primer, anti-mould paint, sundries.
Professional — single room (surface)
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Travel, HEPA vacuum, biocide, disposal, half-day labour.
Professional — bathroom or kitchen clean
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Sealant scraping, tile grout, extractor cleaning.
Professional — whole flat / multi-room
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Containment, air filtration, disposal, redecoration prep.
Contaminated soft furnishings (per item)
- Price basis (UK 2026)
- Written quote required
- What moves the price
- Specialist wet-cleaning, HEPA vacuuming or disposal.
Stop The Mould does not publish price ranges it has not verified. Every figure on this page is either free at the point of visit or our own published pricing; everything else needs a written, itemised quote for your property.
What drives the price up or down
Cleaning is priced by area, height, and how much soft material is contaminated. It is not usually priced by ‘severity’ in the sales sense — that word is often used to inflate quotes.
Pushes price up
Contaminated soft furnishings
Curtains, mattresses, upholstered chairs and carpets take longer to clean and sometimes cannot be recovered.
Pushes price up
HEPA + containment for spreading contamination
Multi-room jobs justify plastic sheeting and negative-air machines. Priced by day, not by m².
Brings price down
Cause already fixed
If the leak is stopped, the fan is fitted, or the gutter is cleared, cleaning is a straightforward job with the scope and exclusions set out in writing.
Pushes price up
Vulnerable occupants on site
Sensitive-occupant protocols (infants, asthma, COPD) require more PPE, more care and longer times.
Cheaper-first alternatives
The universal ‘cheaper first’ here is: fix the cause before you clean. This one habit saves the biggest single line item in the mould-cost cluster.
Bathroom-ceiling mould with weak fan
Fit the fan first, then clean once. Cleaning before the fan is money you will spend again.
Corner mould behind wardrobe
Move the wardrobe, add airflow gap and insulate the cold spot. Then clean. Skip the ‘maintenance clean’ package.
Small (<1 m²) surface patch, otherwise healthy household
Safe DIY using a mould-safe cleaner (not neat bleach on porous surfaces) is proportionate.
Regular ‘maintenance cleans’ from a service
A monthly recurring clean without a cause fix is a subscription for the same problem to keep returning.
Regional variation, multiple quotes, and red flags
Prices vary by region, by trade and by how far a surveyor or contractor has to travel. Rather than relying on a national average, get two or three written quotes for your property and compare what each one actually includes.
A defensible cleaning quote describes the method (HEPA vacuum first, biocide type, encapsulating paint if used), the disposal (double-bagged, sealed), the redecoration scope if included, and any exclusions.
Red flag
‘Lifetime protection’ from cleaning alone
Cleaning does not protect anything. Protection comes from removing the cause; anti-mould paint is a top-up, not a barrier.
Red flag
Bleach used as the primary treatment on porous surfaces
Neat bleach on plaster or plasterboard whitens the visible mould but doesn’t remove the biology. It is a cosmetic clean.
Red flag
No PPE for vulnerable occupants during work
Cleaning kicks up spores. Households with infants, asthma or COPD should not be present during works.
Red flag
‘We can start today’ without inspection
A cleaner who quotes and starts without seeing the substrate is likely charging a flat fee for whatever they find.
Red flag
Bundled with unrelated services (‘deep clean + damp survey’)
Damp diagnosis and cleaning are different products from different specialists. Bundles often blur both.
Safe DIY mould cleaning — the honest guide
For small patches under 1 m² with no vulnerable occupants and no structural concern, DIY cleaning is proportionate. Wear a well-fitting FFP2 mask, gloves and eye protection. Use a mould-safe cleaner (fungicidal wash or dilute domestic disinfectant per NHS guidance), and avoid neat bleach on porous plaster and plasterboard.
Wipe from the outside of the patch inward with a disposable cloth, then bag and dispose of everything in sealed rubbish bags. Open windows for cross-ventilation during and after. If the mould returns within two weeks, the cause has not been fixed — no amount of further cleaning will change that.
When cleaning is genuinely pointless
Cleaning is pointless in three scenarios: when the moisture cause is still active, when the substrate is too damaged to hold a clean surface (soft plaster, blown paint), and when the occupants’ health means any spore disturbance carries risk. In these cases, the correct sequence is: diagnose, fix the cause, remediate the substrate, then clean.
Any contractor who wants to clean before diagnosis is either optimistic or selling the wrong product. Diagnosis is a Free Case Check; the clean can wait a week.
Before you spend anything
Before booking any clean, capture the case with photos and note when the mould started. If we can see the pattern, we can tell you whether cleaning first is the right sequence — or whether you need to fix the cause first to avoid paying twice.
This is general information, not medical advice. If you're worried about your health, contact your GP or NHS 111.
This is general information, not legal advice. For advice on your specific situation, contact Shelter, Citizens Advice, or a solicitor.
Cost FAQs
Is it safe to clean mould yourself?
For small patches with no health-vulnerable occupants, yes — with proper PPE and mould-safe cleaner. NHS guidance covers safe DIY cleaning.
Does anti-mould paint work?
As a top-up over a properly cleaned and dry surface, yes — it slows regrowth. On an untreated damp wall, it will grow mould on the new paint layer within months.
Should I use bleach?
Bleach is fine on non-porous surfaces (tiles, sealants). On porous surfaces (plaster, plasterboard) it whitens the surface without removing the biology beneath — use a fungicidal wash instead.
How often should I re-clean if the cause is fixed?
Ideally never. If the cause is genuinely fixed, mould should not return. If you find yourself cleaning the same spot annually, the cause is not fixed.
Do I need to leave the house during a professional clean?
For small surface cleans, no. For multi-room work or households with asthma, COPD or infants, vacate for the duration and for a few hours after.
Found mould? Don't just photograph it.
Upload the right photos, get a clear first assessment, and organise your evidence, report, messages and follow-up in one place.
Free first checkPrivate by defaultIndependent of remediation sales
Other cost guides
Cost guide
Mould removal cost UK
Cost guide
Condensation fix cost
Cost guide
Cost to replace bathroom extractor