How much does it cost to get mould removed from a wall or ceiling?

A small patch typically costs £150–£400. A whole wall, ceiling or room usually costs £400–£800. If the mould has soaked into plaster and the plaster has to be replaced, expect £800–£3,000 or more, depending on the area and the cause.

Is mould removal covered by insurance?

Usually only if the mould results from a sudden, insured event such as a burst pipe or storm damage, reported promptly. Most buildings and contents policies exclude mould caused by gradual problems like long-term condensation or lack of maintenance. Check your policy wording and speak to your insurer before assuming cover applies.

Do I need a damp survey before getting mould removed?

For a small patch with an obvious cause, you can often go straight to treatment. For anything recurring, spreading or unexplained, an independent damp survey first is better value, because it identifies the moisture source so you aren't paying to treat the same patch again in six months.

Why do quotes for the same job vary so much?

Mainly scope. Some quotes cover surface treatment only, while others include the fix for the underlying cause, such as ventilation, replastering or damp-proofing. A cheaper quote that treats only the visible mould isn't necessarily better value. Ask exactly what's included before comparing prices.

Does mould removal cost more in London?

Generally yes, in line with higher trade labour rates in London and the South East. The scope of the job usually affects the price more than the location does.

Is it cheaper to remove mould myself first?

For a small patch on a hard surface, yes, using appropriate protection and a mould-specific product. If it returns, or it's on plaster or fabric, repeated DIY cleaning usually costs more in the long run because it doesn't address the moisture source.

Mould Removal Cost UK 2026: £150–£3,000+ Price Guide

Quick answer: Professional mould removal in the UK typically costs £150–£400 for a small, isolated patch, £400–£800 for a room or several patches, and £800–£3,000+ for extensive remediation where plaster has to be replaced. The price depends on how far the mould has spread and whether the moisture causing it also needs fixing.

Mould is cheap to clean and expensive to cure. The visible growth is the easy part. What pushes a job from a few hundred pounds to a few thousand is the cause underneath: a leak, failed damp-proofing or a home with no working ventilation. This guide sets out what you should expect to pay in 2026, what changes the price, and how to compare quotes so you're not paying for the same job twice. Prices are typical UK ranges, not fixed rates, and vary by region and contractor.

Mould removal cost by job size

Small, isolated patch (surface treatment only): £150–£400. One affected area, usually a bathroom or kitchen, on a hard or lightly porous surface, with an obvious cause and no sign of a structural problem.
A room or several patches: £400–£800. Mould across a ceiling, around a window or behind furniture, including cleaning with HEPA vacuums and biocidal treatment, and sometimes anti-mould sealing paint.
Extensive remediation: £800–£3,000+. Larger areas, mould that has soaked into plaster or plasterboard, or jobs that mean stripping out and replacing material, sometimes including flooring or insulation.
Whole-property or insurance-led jobs: £3,000 and upwards. Rare, and usually the result of long-term leaks or flooding.

The related costs people forget

Removing the mould is often only one line on the final bill. Depending on the cause, you may also need:

An independent damp survey: £150–£500. Identifies whether it's condensation, penetrating damp, rising damp or a leak, and gives you a written scope of works. See our guide to how much a damp survey costs.
Ventilation improvements: roughly £100–£400 for a new extractor fan, and £400–£800 for a positive input ventilation (PIV) unit fitted. Often the real fix for condensation. See PIV vs MVHR vs extractor fans.
Structural repairs. Fixing a gutter, re-pointing, repairing flashing or a damp-proof course can each cost hundreds to a few thousand pounds, depending on the extent.
Redecoration. Replastering, repainting and replacing flooring after treatment are usually quoted separately.

Hourly rates

If a contractor quotes by the hour rather than for the job, typical rates are roughly £25–£50 per hour for a mould removal specialist and £30–£60 per hour for a damp proofer. Reputable firms usually give a fixed price after an inspection, so an open-ended hourly quote deserves questions.

What drives the price up

Extent of growth. More surface area means more labour and materials.
Type of surface. Porous materials such as plaster, plasterboard, fabric and untreated wood often need removing and replacing, which costs more than treating tile or glass.
Root cause. Condensation mould is usually the cheapest to resolve, through better ventilation and heating. Rising and penetrating damp often need structural work on top of the mould treatment.
Access. Mould behind fitted furniture, in a roof void or on a party wall takes longer to treat.
Location. Labour rates are higher in London and the South East.
Health considerations. Homes with young children, older people or someone with a respiratory condition may need stricter containment and a more thorough clean. Our guide explains whether black mould is dangerous.

What a good quote should include

Compare quotes on scope, not just price. A proper quote should say:

What caused the mould, or how the contractor will find out
Which areas will be treated and by what method
Whether affected plaster or materials will be removed and replaced
How the cause will be fixed, or whether that is excluded
What clean-up and containment is included
Any guarantee, and what it covers and for how long
Whether redecoration is included

A quote that only covers wiping down the visible mould, without investigating or fixing the moisture source, treats the symptom. If the cause isn't addressed, the mould will return and you'll pay for the same job again, often within a year. Get at least three written quotes and ask each one the same questions.

Should you get a survey first?

A survey is usually worth it when:

The mould keeps returning after cleaning
It covers more than a small, single area
There's no obvious explanation, such as a bathroom with no extractor fan
You're a landlord who needs a written report as evidence of a proper response. Our landlord's guide to dealing with mould explains what to record.
You're arranging insurance or selling the property

For a small, clearly explained patch, such as the corner of a shower enclosure with no fan, going straight to treatment is reasonable.

How to keep the cost down

Act early. Mould on the surface is cheap to treat. Mould that has been left for months soaks into plaster, and that's when the bill climbs.
Fix the cause once. Paying for a clean, then again for a clean six months later, costs more than one job that includes the fix.
Get the diagnosis independent of the sale. A survey from someone who doesn't profit from the recommended work protects you from paying for treatment you don't need.
Bundle the work. If you need ventilation, decorating and mould treatment, ask one contractor to quote for the lot or coordinate the visits so access and set-up costs aren't repeated.
Keep records. Landlords should keep the survey, quotes, invoices and photos. They're the evidence of a prompt, proper response if a tenant or council asks.
Ask about guarantees. A written guarantee on the treatment and on any ventilation work shows the contractor expects it to last.

Who pays: landlord or tenant?

In England, the landlord is generally responsible for damp and mould caused by the building, including leaks, damp, and inadequate ventilation or heating, so the cost of the fix falls to them. Tenants are responsible for damage they cause themselves. See who is responsible for damp and mould in a rented property. Social landlords already work to Awaab's Law deadlines, and the government has said private landlords will follow.

DIY or professional?

Small patches on hard surfaces can be cleaned with a mould-specific product, gloves, eye protection and a mask for the price of a bottle of cleaner. But if the mould is on a porous surface, covers a large area, comes back within weeks or is linked to a damp patch, repeated DIY cleaning usually costs more than one proper remediation. See how to clean black mould safely.

Get an accurate price for your job

The most reliable price is a written quote after an inspection by a specialist covering your area. Get up to three free quotes from verified mould removal and damp specialists, or search the directory. Your details only go to the specialists you choose.

How Much Does Mould Removal Cost in the UK? 2026 Price Guide