TL;DR — Silverfish Treatment Cost At A Glance
- Most people pay £100 – £220 for professional silverfish treatment outside London, rising to £130 – £260 in London and the South East (inc VAT).
- A single treatment clears most cases, though heavier or damp-linked infestations may need a follow-up visit.
- Price depends on the number of rooms affected, how established the infestation is, and whether the underlying damp problem needs addressing.
- Quotes usually cover the survey, treatment and advice, but fixing the damp or ventilation that attracts silverfish is a separate job.
- Silverfish are drawn to moisture, so improving ventilation in bathrooms, kitchens and lofts is often the real long-term fix.
- A BPCA-qualified technician treats the harbourage points — skirting, cracks, under sinks and airing cupboards — that a surface spray misses.
Get a fixed price for professional silverfish treatment — check prices and book online or call to arrange a visit.
How Much Does Silverfish Treatment Cost In 2026?
Professional silverfish treatment in the UK costs £100 – £220 on average, rising to £130 – £260 in London and the South East (inc VAT). A single treatment for a contained problem sits at the lower end; a larger property or an established, damp-linked infestation across several rooms lands towards the top.
Silverfish are harmless to people but a persistent nuisance — they feed on starches and can damage paper, book bindings, wallpaper paste and stored fabrics. They thrive in humid, dark spots, which is why they turn up in bathrooms, kitchens, airing cupboards, lofts and behind skirting. Treatment targets those harbourage points directly, rather than the odd insect you spot on the bathroom floor at night.
Here is what you can expect to pay for silverfish treatment across the UK:
| How you book | Rest of UK | London & South East |
|---|---|---|
| Single treatment (one or two rooms) | £100 – £160 | £130 – £200 |
| Larger / multi-room treatment | £160 – £220 | £200 – £260 |
| Follow-up / booster visit | £50 – £90 | £70 – £120 |
| Treatment plus ventilation advice | From £120 | From £150 |
Figures include VAT and reflect 2026 market rates. Your exact price depends on the number of rooms, the severity and your postcode — get a fixed quote here.
Silverfish Treatment Cost By Severity And Cause
Silverfish almost always signal excess moisture. The scale of the infestation and whether damp is driving it change both the treatment and the price.
| Scenario | Typical price (rest of UK) | Typical price (London) |
|---|---|---|
| A few silverfish, one room | £100 – £140 | £130 – £180 |
| Established infestation, bathroom/kitchen | £140 – £190 | £180 – £230 |
| Multiple rooms or loft involvement | £180 – £220 | £220 – £260 |
| Damp-linked infestation (plus remediation) | £150 – £220+ (plus damp works) | £190 – £260+ |
The treatment cost is almost entirely labour and product. The variable that catches people out is the underlying damp: where poor ventilation or a leak is feeding the infestation, sorting that — better extraction, mould treatment or a plumbing fix — is a separate cost but often the only permanent solution.
What Affects The Cost Of Silverfish Treatment?
Several things decide where you land in the ranges above.
1. The Number Of Rooms Affected
A single humid bathroom is a quick job. Once silverfish have spread into the kitchen, airing cupboard, loft or several rooms, the treated area grows and the price with it.
2. How Established The Infestation Is
A handful of insects spotted early is easy to knock back. A long-standing infestation with eggs and multiple generations present may need a follow-up visit to fully clear.
3. The Underlying Damp
Silverfish need moisture to survive. Where the real driver is condensation, poor ventilation or a leak, treatment alone gives short-term relief — addressing the damp is the lasting fix and an additional cost.
4. Access And Harbourage
Silverfish hide in cracks, behind skirting, under baths and in airing cupboards. Cluttered or hard-to-reach spaces make thorough treatment slower.
5. Your Location
London and the South East run roughly 20–30% higher than the rest of the UK, reflecting higher labour and travel costs.
6. Whether A Guarantee Applies
Treatments that include a return-if-needed guarantee may cost slightly more upfront but protect you if the problem recurs within the period.
What's Included — And What's Not
Typically included in a silverfish treatment quote:
- A survey to confirm the species and find the harbourage points
- Targeted treatment of skirting, cracks, under sinks, cupboards and other hiding spots
- Advice on reducing humidity and removing food sources
- A follow-up visit where the infestation warrants it
Usually charged separately or not included:
- Fixing damp, condensation or ventilation problems
- Plumbing repairs to leaks feeding the infestation
- Mould removal where damp has caused it
- Replacing paper, books or fabrics already damaged
Always confirm whether a follow-up and any guarantee are included, so the final bill matches the quote.
Can You Do It Yourself?
Silverfish respond reasonably well to DIY, especially when caught early. Reducing humidity is the biggest lever — run bathroom and kitchen extractor fans, ventilate regularly, fix dripping taps and use a dehumidifier in persistently damp rooms. Sealing cracks, vacuuming hiding spots and setting sticky traps or bait will knock back a light infestation for a modest outlay.
Where DIY struggles is with established or recurring infestations, particularly in properties with an underlying damp problem. Shop-bought sprays hit the insects you can see but rarely reach eggs and juveniles deep in wall cavities and behind fittings. Call a professional when the problem keeps returning, spans several rooms, or is clearly tied to damp you cannot resolve yourself. A BPCA-qualified technician treats the harbourage thoroughly and can advise on the moisture control that keeps them away.
How To Save Money On Silverfish Treatment
- Cut the humidity first — extractor fans, ventilation and a dehumidifier make treatment far more effective and sometimes fix a light problem on their own.
- Act early while the infestation is confined to one room.
- Declutter and clean the affected areas before the visit so treatment reaches every hiding spot.
- Fix leaks and condensation so silverfish do not simply return to the moisture that drew them.
- Bundle rooms into one visit rather than booking separately.
- Get 2–3 quotes and compare whether a follow-up and guarantee are included.
How To Hire A Good Pest Controller
Choose a firm that employs BPCA-qualified or RSPH-certified technicians, holds public liability insurance, and gives a written quote covering the rooms treated and any follow-up. Ask how they will find the harbourage, what products they will use, and whether they can advise on the damp or ventilation issue behind the infestation. Reviews and references are worth checking before you commit.
With Fantastic Services, you get vetted, insured pest controllers, a clear treatment plan and transparent pricing — describe the problem and get a price up front.
Frequently Asked Questions
How Much Does Silverfish Treatment Cost In The UK?
Professional silverfish treatment costs £100 – £220 across most of the UK, rising to £130 – £260 in London (inc VAT). A single-room job is cheapest; a multi-room or damp-linked infestation sits at the top of the range.
Why Do Silverfish Keep Coming Back?
Silverfish are drawn to moisture. If the underlying humidity, condensation or leak is not addressed, treatment only clears them temporarily. Improving ventilation and fixing damp is usually the lasting solution.
Are Silverfish Harmful?
Silverfish do not bite or spread disease, so they pose no direct health risk. They are a nuisance pest that can damage paper, books, wallpaper and stored fabrics, and their presence often points to a damp problem worth addressing.
Does Silverfish Treatment Need More Than One Visit?
A single treatment clears most cases. Heavier or long-established infestations, particularly where damp is involved, may need a follow-up visit to fully break the cycle.
How Can Silverfish Be Prevented?
Keep humidity low with good ventilation and extractor fans, fix leaks promptly, store food and paper in sealed containers, and seal cracks around skirting and pipework. A dry, well-ventilated home is far less attractive to silverfish.
Is Silverfish Treatment More Expensive In London?
Yes. Expect to pay roughly 20–30% more in London and the South East than in the rest of the UK, reflecting higher labour and travel costs.
