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Scratching in the walls at night: what it is and what to do

Scratching in the walls at night: what it is and what to do

Post by James Shore, BPCA trained and certified.

Rodents

Published: October 4, 2026

Updated: October 15, 2026

Scratching in the walls at night is almost always rats or mice. Rats sound heavier and the noise moves along the wall. Mice sound lighter and quicker and stay in one area. Squirrels are louder still, and active in daylight rather than after dark.
scratch marks on the walls from rats

Is it rats or mice in my walls?

Rats are heavier, so you’ll hear dragging, thumping and gnawing that moves along the wall. Mice make lighter, quicker scratching that tends to stay in one area.

Droppings usually settle it if you can find them. Rat droppings are noticeably bigger than mouse droppings, and both turn up along walls, behind appliances and near food. If you’re still not sure, a photo of the droppings is usually enough for James to tell you which it is.

Why do I only hear it at night?

Rats and mice are most active after dark, when the house is quiet. Hearing them only at night doesn’t mean the problem is small. It just means they’re behaving normally, and it’s the time you’re most likely to be lying awake listening.

What if I hear it in the daytime?

Daytime noise in the loft is more likely to be squirrels, which are active in daylight rather than at night. If you’re also finding droppings, gnawed wood or chewed insulation, it’s worth getting it looked at either way, whatever it turns out to be.

Where is the noise actually coming from?

Often not where you hear it. Sound travels along joists and through cavities, so a noise in the bedroom wall can come from the loft or the floor below.

That’s why the first visit starts with finding where they’re living and how they’re getting in, not where the noise seems loudest. One customer, Nicky, put it simply in her Google review:

“We cannot praise James enough for coming to our rescue when we heard noises in the ceiling…. he discovered rats!! Over the last few months James has rid us of this problem.”
Nicky Zaki, Google review

Will they go away on their own?

No. A wall cavity or floor void is warm, dry and undisturbed, which is exactly what rats and mice look for. Left alone, they breed and the noise gets worse rather than better. A female brown rat can have 3 to 12 litters a year, each of six to eight young, according to the British Pest Control Association.

If it’s rats in the walls, the guide to rats in wall cavities explains how they usually get in and what treatment involves.

What should I do tonight?

Don’t block the hole you can see, because it hides the way in. Instead, note when you hear the noise, where it is and whether it moves, and keep food sealed away. That information makes the first visit quicker.

If you can, take a photo of any droppings or gnawing and send it with your enquiry. You’ll get a free remote quote, usually within ten minutes, with a fixed price agreed before any work starts.

Do I need to move out while it’s treated?

No. Treatment for rats or mice in walls or under floors is done with the house in normal use, and you don’t need to leave. Bait in wall voids and lofts goes where people and pets don’t go, and anywhere children or pets could reach it, it’s kept in locked, tamper-resistant boxes.

If it sounds like rats, see rat control in Fareham and Gosport. If it’s lighter scratching in one spot, it’s more likely mice: see mouse control. Either way, a photo of droppings gets you a free remote quote, usually within ten minutes.

Sources: British Pest Control Association, brown rat guide

What customers say about NJS Pest Control

Real reviews left on Google by NJS Pest Control customers.

 Wobble and Squeak
Wobble and Squeak@ wobbleandsqueak
James was a pleasure to work with from start to finish. I've waited 6 months to check that our rat problem has definitely got sorted before writing this review. I am very happy to say that it has. No problem was too big! he came out more then 8 times in total to check and rebate the rat boxes. He found the entry point into our house and sealed it successfully. He cleared our attic and sealed up all the nooks and crannies. Very pleased with the job. Highly skilled. Much appreciated. Well done.
Mary Craven
Mary Craven@marycraven
A desperate situation needing many visits and dealt with professionally by James. Rodents eradicated thank goodness. Thanks James
Tracey Cook
Tracey Cook@traceycook
My mum has been struggling with rats getting into her loft on and off now for the past 10 years, by means of 2 drains not in use anymore, we have used several people in the past, that haven’t dealt with it properly. I called James, he was very polite and responded straight away, went to my mums and went up in the loft to take a look came up with a plan, was great with my mum, James called me to explain everything as mum is 89, and had sorted the rats, and drains, absolutely great service, good price, very clean and tidy, couldn’t recommend highly enough, thank you James.
Nicky Zaki
Nicky Zaki@nickyzaki
We cannot praise James enough for coming to our rescue when we heard noises in the ceiling…. he discovered rats!! Over the last few months James has rid us of this problem. He is highly efficient, knows his stuff & a very personable man to deal with. We rate James extremely highly.
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