June 2025

Hearing scratching in the walls at night? Noticing strange sounds behind plasterboard or skirting boards? You might be dealing with mice in your walls — a common but unsettling issue for both homeowners and businesses across London.

At Beaver Pest Control, we help customers across London and the South East identify and eliminate mice infestations quickly and safely. Here’s how to tell if you have mice in your walls, and what steps to take next.

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Common Signs of Mice in Your Walls

If you’re wondering what are the signs of mice in walls, look (and listen) for the following clues:

1. Scratching or Scurrying Noises

The most obvious sign is the sound of movement — especially at night. Mice are nocturnal and tend to be most active when it’s quiet. You might hear:

• Light tapping or scratching
• Scuttling or running noises
• Gnawing sounds

2. Unpleasant Smells

A strong musky odour is a telltale sign of rodent urine or droppings, often trapped within cavity walls or insulation.

3. Droppings and Grease Marks

Mice can sometimes squeeze out from small cracks to forage. If you notice tiny droppings (about the size of a grain of rice) or dark smudges near holes, you may have mice in your walls.

4. Damage to Wires or Plaster

Mice love to chew — and your electrical wiring and plasterboard are no exception. If you notice unexplained damage, particularly in corners or behind furniture, this could be a red flag.

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Why Are There Mice in Your Walls?

London’s dense urban layout, older buildings, and frequent renovations create the perfect network of entry points and hiding spots for mice. Common access routes include:

• Gaps around pipework or vents
• Cracks in brickwork or foundations
• Entry from neighbouring properties
• Broken or faulty drain systems

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What to Do if You Suspect Mice in Your Walls

✅ Don’t Ignore the Problem

Mice reproduce quickly — so even a small problem can become a full-blown infestation in a matter of weeks.

✅ Call in the Experts

At Beaver Pest Control, our BPCA-certified technicians use advanced techniques such as:

• Non-invasive wall cavity inspections
• Bait stations and trapping methods
• Entry point proofing and drain surveys
• Advice on how to prevent re-infestation

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Need Help With Mice in Walls?

Whether you’re dealing with mice in walls in a London flat or a nationwide commercial property, Beaver Pest Control can help. Our discreet and effective service ensures your pest problem is handled fast — with long-term prevention in mind.

If you’re hearing scratching noises at night or noticing odd smells or droppings, you might be dealing with mice under your floorboards. It’s a common problem for London homes and businesses, particularly in older buildings or properties with easy access points.

At Beaver Pest Control, we’ve helped hundreds of property owners deal with mice under floorboards, including upstairs areas. Here’s everything you need to know—plus how to get rid of them for good.

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Why Are Mice Living Under Your Floorboards?

Mice are resourceful and can squeeze through gaps as small as 6mm. Floorboards make the perfect hiding place: warm, dark, undisturbed, and full of potential nesting materials. Common reasons for an infestation include:

• Cracks in walls, skirting boards or foundations
• Gaps around pipes and utilities
• Easy access from neighbouring properties or basements
• Food and water sources nearby

Whether it’s mice under floorboards upstairs or on the ground floor, the cause is usually the same—entry points and shelter.

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Signs You’ve Got Mice Under Floorboards

Not sure what’s going on under your feet? Look out for:

• Scratching or scurrying noises, especially at night
• Droppings around skirting boards or kitchen cupboards
• Gnawed materials, such as wires, wood or food packaging
• A musky odour near floor vents or beneath furniture

The longer mice are left undisturbed, the more they multiply—and cause costly damage.

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How to Get Rid of Mice Under Floorboards

If you’re searching how to get rid of mice under floorboards, here are the key steps:

1. Identify Entry Points

Look for holes near pipes, vents, floorboards, and external walls. These need to be sealed properly to stop re-entry.

2. Set Traps and Baits

Traps can help reduce the population, but placement is crucial—especially if mice are travelling under floors and not openly visible.

3. Professional Proofing

DIY measures often fall short when mice are under floorboards. At Beaver Pest Control, we offer expert rodent proofing to seal hidden gaps and prevent future infestations.

4. Regular Monitoring

For commercial clients, we recommend a pest management contract. This includes routine checks, remote monitoring, and compliance documentation—ideal for food businesses, schools and offices.

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Why Choose Beaver Pest Control?

We provide tailored pest control solutions for homes and businesses across London and the South East, with nationwide coverage for commercial sites. Our technicians are BPCA-certified, discreet, and highly experienced in tackling rodent issues like mouse under floor infestations.

Whether it’s mice under your floorboards upstairs or a full-scale commercial infestation, we’ve got you covered.

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Call in the Experts

If you’ve heard mice under your floorboards or spotted signs of activity, don’t wait. The sooner you act, the easier—and cheaper—it is to fix the issue.