Mice are one of the most common pest problems in London, particularly in Victorian and Edwardian terraces, converted flats, and any property backing onto gardens or shared drains. A mouse can squeeze through a gap the width of a pencil, which is why sealing entry points is just as important as the initial treatment — without it, new mice simply move in behind the ones you’ve cleared.
Small, dark droppings (roughly rice-grain sized) near food storage, along skirting boards, or inside cupboards
Scratching or scurrying sounds in walls, ceilings, or under floorboards — usually most noticeable at night
Gnaw marks on food packaging, skirting boards, or wiring
A stale, ammonia-like smell in enclosed spaces such as cupboards or lofts
Greasy smear marks along regular routes near walls, where mice repeatedly brush against the same surface
Treatment reduces the current mouse activity inside your property, using professional-use bait placed in the areas mice are actually using, typically over two visits within a few weeks to a few months, allowing us to check progress and adjust as needed.
Proofing is the long-term fix: systematically sealing the gaps mice are using to get in — around pipework, under kitchen units, through air bricks, and around service penetrations. Treatment without proofing often means the problem returns, since it doesn’t change how mice are getting in.
For most London properties, especially flats and terraces with shared walls, we’d recommend treatment first, followed by proofing once activity has calmed down and access points are clear.
Inspection — checking likely entry points and activity signs throughout the property, including kitchen units, boiler cupboards, and loft spaces.
Professional-use bait placement — positioned precisely in active areas, well out of reach of children and pets.
Follow-up visit — to check and replenish bait and assess whether activity has reduced.
Proofing (where needed) — sealing identified entry points around kitchen units, pipework, air bricks, and skirting gaps.
Mice treatment in London typically starts from around £150–£220 for a standard property, covering two to three visits over a few weeks. Mouse proofing is usually quoted separately once entry points are identified — typically starting from £300–£350, depending on the size of the area being sealed and how many access routes are found. We’ll always separate treatment and proofing clearly on your quote so you know exactly what you’re paying for.
Mice are a frequent call-out across North West London (period terraces), North East London (dense converted housing), and South East London (riverside flats). Check your area page for local detail, or contact us directly.
The Extermination process includes a thorough inspection of your property, sealing off entry points to stop future infestations, using safe and effective pesticides and rodenticides, and providing a warranty.
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Most infestations show a clear reduction in activity within the first one to two weeks of treatment, with full resolution typically confirmed over two to three visits.
If entry points aren't sealed, yes — this is the single most common reason mice problems recur. Proofing is what actually stops repeat infestations, not just the initial bait treatment.
Mice droppings and urine can spread bacteria including salmonella, and their gnawing can damage wiring and insulation, which is a fire risk as well as a costly repair. They breed quickly, so a small problem can become a larger one within weeks.
Yes — professional bait is placed in tamper-resistant stations or locations inaccessible to children and pets, and we'll talk you through exactly where everything is placed.
Mice droppings are smaller (roughly rice-grain sized) with pointed ends, while rat droppings are noticeably larger. Mice also tend to be more active in kitchens and cupboards, while rats are more commonly linked to gardens, drains, and larger structural gaps.
Mice are drawn to warmth and shelter as much as food, and can enter through gaps as small as a pencil width — a spotless home can still attract mice if entry points around pipework or air bricks are unsealed.
Yes — persistent gnawing can damage wiring (a fire risk), insulation, and skirting boards over time, which is another reason to treat and proof early rather than waiting.
A single sighting can sometimes be an isolated visitor, but mice breed quickly, so it's worth booking an inspection to confirm whether it's an isolated incident or the start of an established infestation.
24/7 emergency response for all common London pests including rodents and insects. Contact us today for a free quotation and guaranteed results.