£180 for up to one hour on suitable small holes. With mice, proofing earns its money more reliably than with any other pest — here is why, and where the limits are.
Mouse proofing is £180, covering up to one hour of work on suitable small holes. It is a separate service from treatment and is not included in the £190 flat or £240 house price.
If you have mice in the property right now, proofing is not what to book first.
With most pests, proofing is a sensible extra. With mice it is closer to the actual solution, and the reason is size.
A house mouse can pass through a gap far smaller than people expect — the working rule is that if a pencil fits, a mouse gets through. Gaps that small are everywhere in an ordinary building, and almost nobody notices them, because there is no reason to look at the 6mm space around a waste pipe until something is using it.
Treat a property and you remove the mice that are there. Proof it and you deal with the reason there were mice there at all.
| Your situation | What you need | Price |
|---|---|---|
| Droppings, noises or sightings now | Treatment first | £190 flat / £240 house |
| Problem dealt with, want to stop it recurring | Proofing | £180 |
| Active problem and obvious gaps | Both — treatment first | £370 flat / £420 house |
| Recurring mice year after year | Both, and be thorough about the proofing | £370 / £420 |
| Mice in a detached shed only | Possibly neither yet | — |
Sealing a building with mice still inside does not remove them. It shuts them in, and a trapped mouse gnaws — in a kitchen or under a floor, that frequently means cabling.
Treatment first, proofing second, every time.
Up to one hour of work on suitable small holes — the accessible openings that are appropriate to close with proofing materials. In a typical property that means:
See our complete service, published prices and treatment information.
View Mouse Control Harrow Weald →This matters if you have had both, or are not certain which you have. Mice get through smaller gaps than rats, so a property proofed against rats is not necessarily proofed against mice — the rat work may have closed the 20mm openings and left the 7mm ones.
Tell us which you are dealing with, or that you are not sure. It changes what needs sealing.
Read nextRat Proofing Harrow Weald – How Much Does It Cost? →Some of it, genuinely yes. Wire wool packed into a gap and sealed over is within most people's reach, and a threshold brush strip on a garage door is a twenty-minute job that solves a real problem.
Two things make it harder than it looks. Identifying which gaps matter is most of the skill — properties have dozens of small openings and only a few are in use. And expanding foam on its own is not proofing: mice chew straight through it, so it needs a chew-resistant material behind it.
For a let, the arithmetic usually favours proofing: £180 once against a second treatment plus another round of tenant disruption. Combined figures are £370 for a flat and £420 for a house, published so it can be authorised without a quotation stage.
No. Treatment is £190 flat or £240 house; proofing is a separate £180.
You are told before the work, not after on an invoice.
Proofing done against mice will generally exclude rats as well, since the gaps are smaller — but say if rats are the concern, because the survey emphasis differs.
Sealed openings stay sealed. Buildings move, weather, and get altered though, so no proofing is permanent — which is why we will not claim it is.
Read nextMouse Control Harrow Weald – What Does Professional Treatment Cost? →One more published price — wasp nest treatment in Harrow Weald is £90 fixed cost, with our guaranteed service.
£180 for up to one hour on suitable small holes.
No, it is a separate service.
After. Sealing mice inside a building makes things worse.
£370 for a flat and £420 for a house.
If a pencil fits through it, a mouse generally can.
No. Mice chew through foam. It needs a chew-resistant material behind it.
Generally yes, since mouse gaps are smaller — but tell us if rats are the concern.
No, and nobody honestly can about a building. Proofing reduces the routes in; it does not seal a house.
Tell us what is happening now and we will tell you which you actually need — including if the answer is neither yet.
Prefer to talk? Call 0203 151 6640 or WhatsApp us.
