
Professional mouse control and prevention for businesses and homes across the North East. NPTA-qualified technicians, RADAR technology, and guaranteed results.
A mouse infestation poses serious risks to health, property, and reputation. Mice contaminate far more food than they eat through constant urination and defecation, gnaw through electrical wiring creating fire hazards, and breed at an extraordinary rate. A single female can produce 7 to 8 litters per year with up to 16 young per litter. Our NPTA-qualified technicians provide structured treatment programmes with species identification, targeted treatment, professional proofing, and follow-up visits to confirm the infestation is fully resolved.
Why acting quickly matters
A single pair of mice can produce over 100 offspring in a year. Mice reach sexual maturity at just 8 to 12 weeks, and each female can have 7 to 8 litters annually with up to 16 young per litter. A minor sighting today can become a full property infestation within weeks, contaminating food stores, damaging wiring, and spreading disease.
Need urgent help with mice?
Same-day emergency response across the North East. Free survey and quotation for businesses and homeowners.
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Mice cause widespread contamination in both commercial and residential properties. They gnaw through packaging, wiring, and insulation, contaminate food stores through constant urination and defecation, and create noise disturbance. Their ability to squeeze through gaps as small as 6mm makes them difficult to exclude without professional proofing.
Mice carry Hantavirus, Lymphocytic Choriomeningitis (LCMV), and Salmonella. They contaminate far more food than they consume. Gnawing through electrical wiring creates a serious fire risk. The Prevention of Damage by Pests Act 1949 places legal duties on property owners to control rodent populations.
| Species | House mouse (Mus domesticus) |
| Body length | 7 to 9.5cm |
| Tail length | Similar to body length |
| Weight | 12 to 30g |
| Colour | Grey-brown fur, lighter underside |
| Lifespan | 9 to 18 months |
| Litter size | 4 to 16 pups |
| Litters per year | 7 to 8 |
| Sexual maturity | 8 to 12 weeks |
| Diet | Cereals preferred, approximately 3g per day |
| Water intake | Can survive without water; drinks up to 3ml if available |
"Had the RADAR system installed after a persistent mouse problem. Brilliant technology. No poison, no mess, and we get an alert the moment anything is caught. Highly recommend for families with young children."
Mark H., Middlesbrough
Free survey and quotation for businesses and homeowners. Same-day response across the North East.
It is illegal to use anticoagulant rodenticides to control field mice due to the high risk of secondary poisoning to wildlife. Accurate species identification is essential before any treatment begins.
Three mouse species cause concern in UK properties, and identifying the correct species is critical for selecting the right treatment approach.
House Mouse (Mus domesticus): The house mouse is the most common pest species in UK buildings. Adults have a body length of 7 to 9.5cm with a tail of similar length and weigh 12 to 30g. They have relatively small feet and a small head with large eyes and ears, which distinguishes them from a young brown rat. House mice are active all year round, not just in winter. They usually live at ground level and burrow but are also capable climbers. Their preferred food is cereals, eating around 3g per day. They can survive without any additional water but will drink up to 3ml per day if their diet is particularly dry. Gestation is approximately 3 weeks, producing 4 to 16 young per litter with 7 to 8 litters per year. They reach sexual maturity in 8 to 12 weeks. Lifespan is typically 9 to 18 months but may be longer indoors with shelter and food access.
Field Mouse (Apodemus sylvaticus): The field mouse has a body length of 80 to 100mm with a tail of 70 to 90mm. Males weigh approximately 25g, females 20g. They have sandy or orange-brown fur on the head and back, yellowish on the flanks, and white on the belly, with a small streak of yellow on the chest. Field mice rarely venture into inhabited buildings but will enter outbuildings and sheds in winter where fruit and vegetables are stored. They are a bigger threat to farming and agriculture businesses. Breeding season runs from March or April to October or November, with gestation of approximately 25 days. Lifespan averages 2 to 3 months but can reach 20 months.
Yellow-Necked Field Mouse (Apodemus flavicollis): Body length 95 to 120mm with a tail of 75 to 110mm and weight of 14 to 45g. Distinguished by a complete band of yellow fur around the neck, large ears, protruding eyes, and a long tail. Mostly a threat in rural areas. Known to chew through electrical wiring, creating a fire risk. More likely to enter buildings than field mice. Prefers mature broadleaved woodland, hedges, rural gardens, and buildings. Most do not survive longer than 12 months.
Rats and mice are both rodents and look similar, but there are important differences that affect treatment. The biggest difference is size: rats are significantly larger and heavier while mice have smaller, slender bodies. Mice have long slender tails covered in hair compared to rat tails which are shorter, thicker, and hairless. A mature mouse can be distinguished from a young rat by its larger ears and longer tail compared to its body length.
Eating habits: House mice prefer cereals and nibble the grain. Brown rats also prefer cereals but cut grain when eating. Mice do not need to drink water but will drink about 3ml if available. Brown rats drink about 60ml per day.
Droppings: Mouse droppings are 3 to 8mm long, granular, black, and scattered randomly. Brown rat droppings are wider, dark brown, and tapered in a spindle shape. Mice produce 50 to 80 droppings per night; rats produce around 40.
Breeding: House mice produce 4 to 16 per litter with 7 to 8 litters per year and reach maturity at 8 to 12 weeks. Brown rats produce 7 to 8 per litter with 3 to 6 litters per year and reach maturity at 10 to 12 weeks. Mice breed faster and in larger numbers, which is why a small problem can escalate rapidly.
If you are unsure whether you are dealing with rats or mice, our technicians will identify the species during the survey visit and recommend the correct treatment. For rat-specific information, see our rat control service.
Mice produce 50 to 80 droppings per night. If you are finding droppings, the infestation is already well established.
Mice are nocturnal, preferring to keep hidden during the day and search for food from dusk until dawn. Signs of an infestation are usually spotted before the mice themselves.
If you notice any of these signs, contact us for a free assessment.
Inside your property:
Outside your property:
Do not sweep or vacuum mouse droppings. Disturbing dried droppings can release harmful particles into the air. Follow UK Health Security Agency cleaning guidelines.
Fresh mouse droppings in poorly ventilated areas pose a direct health risk due to the bacteria and viruses they contain. Mice contaminate far more food and surfaces than they consume through constant urination and defecation as they travel.
Diseases spread by mice:
How to identify mouse droppings: Approximately 3 to 8mm in length, tapered at the ends, resembling dark grains of rice. A single mouse deposits 50 to 80 droppings randomly each night. Fresh droppings are soft and moist. To test for current activity, carefully remove droppings from a specific area (wearing gloves and a mask), then re-inspect after 24 hours. New droppings confirm a current infestation.
Cleaning mouse droppings safely (UK Health Security Agency guidelines):
Hover or tap a month to see Mouse activity details
Indoor infestations established. Breeding continues in warm spaces. High call-out period.
Indoor activity remains high. Gnaw damage and droppings increase in lofts and cavity walls.
Breeding accelerates. Field mouse breeding season begins. Indoor infestations grow.
Outdoor foraging increases. Field mice active in gardens and outbuildings.
Mixed indoor and outdoor activity. Garden mice active. Good time for commercial preventative visits.
Most activity outdoors. Fewer indoor call-outs. Ideal time for proofing and entry point sealing.
Peak outdoor foraging. Lowest indoor risk. Best period for preventative proofing work.
Outdoor activity remains high. Prepare for autumn ingress by sealing entry points.
Autumn ingress begins. Mice move indoors as temperatures drop. Entry points become active.
Peak autumn ingress. Properties near farmland and rural areas most vulnerable.
Indoor infestations establishing. Scratching, droppings, and ammonia smell noticed.
Mice fully established indoors. Nesting near heat sources. Breeding continues through winter.
Once mice are indoors, they breed continuously - a single pair can produce up to 80 offspring in a year. An autumn entry left unchecked becomes a significant infestation by midwinter, with droppings, gnaw damage, and ammonia smell spreading through the property.
Hearing scratching or found small droppings? Do not wait - mice reproduce fast and a small problem grows quickly. Call us for a free assessment.
Autumn (September to November) - Peak ingress: As temperatures drop, mice that have been foraging outdoors seek warmth and shelter inside buildings. A gap of just 6mm - roughly the width of a pencil - is enough for a mouse to squeeze through. Watch for small dark droppings (3 to 8mm) along skirting boards, behind kitchen units, and in cupboards. Scratching sounds in walls and ceilings at night are often the first sign. Properties in Darlington, Stockton, Middlesbrough, and Hartlepool see the sharpest increase in call-outs during this period.
Winter (December to February) - Year-round breeding indoors: Unlike rats, house mice live indoors permanently once established and breed continuously in warm spaces. Lofts, cavity walls, and areas near heating pipes are favoured nesting sites. Watch for a musty ammonia smell in enclosed spaces, shredded paper or insulation used as nesting material, and gnaw marks on food packaging and cables. A single pair of mice can produce up to 80 offspring in a year.
Spring (March to May) - Indoor colonies grow, field mice emerge: Indoor house mouse populations that went untreated through winter grow significantly during this period. Outdoors, field mice and wood mice begin their breeding season from March or April. Watch for increased activity in outbuildings, garages, and sheds. This is an important period for commercial preventative monitoring, particularly in food businesses.
Summer (June to August) - Best window for proofing: More outdoor activity from field mice and wood mice. Indoor house mouse populations remain stable but active. Watch for droppings and gnaw marks in garden sheds, outbuildings, and around compost areas. This is the ideal time to carry out proofing work - seal gaps around pipework, fit brush strips to external doors, and block entry points before the autumn ingress begins again.
North East pressure points: Older housing stock across the region provides easy access through gaps around pipework, cavity walls, and ill-fitting doors. Properties near farmland and allotments see higher autumn ingress. If your property has had mice before, they will return through the same entry points unless those gaps are sealed.
Accurate identification of house mice, field mice, and yellow-necked field mice is essential before treatment begins. It is illegal to use anticoagulant rodenticides on field mice. Our technicians identify the species on the first visit.
Discreet, bait-free traps using infrared detection and CO2 capture. Automatic alerts are sent when a mouse is caught. 24/7 monitoring via an online portal. No chemicals involved.
All rodenticide use follows Campaign for Responsible Rodenticide Use standards. Tamper-resistant bait stations with Bitrex coating protect children, pets, and non-target wildlife.
We identify and seal all entry points as part of the treatment programme. Mice squeeze through gaps as small as 6mm, so thorough proofing is essential to prevent re-infestation.
Most infestations are resolved in 3 visits over 4 to 6 weeks. Each visit includes survey, treatment, monitoring, and proofing assessment. Nothing is left to chance.
An active mouse infestation poses significant risks: disease transmission, property damage from gnawing through wood, plaster, insulation, and electrical wires (creating a serious fire risk), widespread contamination (a single mouse produces over 80 droppings per day), rapid breeding, and business and reputational harm.
Our treatment follows the ERDM framework: Exclusion, Restriction, Destruction, and Monitoring.
Step 1: Confirm the infestation. Look for droppings, gnaw marks, nests of shredded materials, persistent ammonia smell, and greasy smear marks. For loft droppings, the crumble test distinguishes mouse droppings (harder, will not crumble) from bat droppings (crumble into powder).
Step 2: Identify the species. House mice typically live indoors year-round. Field mice primarily live outdoors but venture inside in colder months. This distinction is critical because it is illegal to use anticoagulant rodenticides to control field mice.
Step 3: Implement exclusion and restriction. Store all food in sealed containers, clean all food debris, restrict access to waste, and declutter. Mice squeeze through gaps as small as 6mm. Check gaps around pipes, brickwork, and under doors. Cover external air vents with fine-gauge wire mesh. Use durable materials (cement, steel wool, wire mesh), not expanding foam.
Step 4: Targeted treatment. Professional treatment based on species, infestation level, and property risk. Options include tamper-resistant bait stations, physical traps, RapidPro acute rodenticide (single-feed elimination), and RADAR connected traps (bait-free CO2 capture with automatic alerts). All technicians are trained to NPTA and CRRU standards.
For full details of what to expect during treatment, see our how we work page.
Most mouse infestations are resolved in 3 visits over 4 to 6 weeks. Heavy or multi-entry infestations may require additional visits.
Mouse infestations are resolved through a structured programme of visits rather than a single treatment. The number of visits depends on the severity of the infestation, the species involved, and the property type.
Visit 1: Survey and treatment (Day 1, 45 to 60 minutes). Full survey and species identification. Tamper-resistant bait stations placed at harbourage points, runways, and entry areas. Entry points logged. Before and after advice provided.
Visit 2: Monitoring and refresh (Week 2, 30 to 45 minutes). Bait uptake checked and recorded. Stations refreshed. Activity levels assessed. Proofing recommendations confirmed.
Visit 3: Final check and clearance (Week 4 to 6, 30 to 45 minutes). Infestation confirmed as resolved. Bait stations removed or transitioned to ongoing monitoring. Full proofing report issued.
Heavy or multi-entry infestations may require additional visits beyond the standard three. RADAR connected trap programmes run continuously with automatic alerts, providing ongoing monitoring without scheduled visits.
To get the best results from treatment, there are practical steps you can take before the first visit.
These steps are not essential for the visit to go ahead, but they help us identify the problem faster and start treatment sooner.
Understanding what happens between visits helps you get the best results from your treatment programme.
A structured, three-stage approach that treats the problem and prevents it returning.
Step 1
A detailed property inspection identifies entry points, infestation hotspots, and the species involved. A targeted treatment plan is developed based on findings.
Step 2
Professional control measures are applied using advanced techniques and CRRU-compliant products. Proofing and sealing work addresses the root cause at the same time.
Step 3
Follow-up visits confirm the problem is resolved. You receive clear documentation, prevention advice, and recommendations for ongoing protection.
Free survey and quotation for businesses and homeowners. Same-day response across the North East.
The safety of your family and pets is built into every stage of our mouse treatment process.
All professional bait stations are tamper-resistant and locked, preventing access by children and non-target animals. Rodenticide baits are coated with Bitrex, an intensely bitter deterrent that discourages accidental ingestion. Bait stations are low-profile and placed in locations inaccessible to small children and pets where possible: behind appliances, inside wall cavities, and under floorboards.
Secondary poisoning: There is a low but real risk of secondary poisoning if a pet consumes a mouse that has fed on rodenticide bait. All treatments use CRRU (Campaign for Responsible Rodenticide Use) compliant products and methods to minimise this risk. Keep cats and dogs away from any mice they find dead. If your pet shows signs of illness after treatment, contact your vet immediately and mention the rodenticide product used.
No vacate period is required for bait station treatments. For RADAR CO2 trap programmes, there is no chemical involved at all, making them fully safe for all household members immediately.
All our rodenticide use follows CRRU guidelines to minimise risk to non-target wildlife and the wider environment.
Prevention is the most effective way to keep mice out. Focus on eliminating food, water, and shelter, then seal all physical entry points.
Eliminate access to food and water: Store dry foods and pet feed in sealed containers. Clean up crumbs, grease, and spilt liquids. Empty bins frequently. Fix leaking taps and pipes. Mice need only about 3g of food per day to survive.
Declutter and clean regularly: Avoid using cardboard boxes for storage as mice shred them for nesting material. Keep lofts, garages, and cupboards tidy. Vacuum under appliances where food debris collects.
Seal entry points (mouse proofing): Mice can squeeze through gaps as small as 5 to 6mm (the width of a pencil). If their head can get through, the rest follows. Mice are excellent climbers, so check higher up the building, not just near the ground.
Garden and external prevention: Remove clutter and debris near walls. Store garden seed in sealed containers. Keep drains and gutters clear. Fill gaps in paving or foundations. Ensure garages and sheds have tight-fitting doors.
For professional proofing with commercial-grade materials, see our rodent proofing service.
A mouse problem in a business is a direct threat to health, safety, and reputation.
Legal requirements:
Environmental Health Officers can issue fines, closure notices, or pursue prosecution. Penalties can reach tens to hundreds of thousands of pounds.
Our commercial service includes: Site survey and risk assessment, tailored treatment plan using proven methods, proofing and exclusion to seal access routes, and ongoing monitoring with data-driven insight through digital platforms.
Common commercial questions:
How to keep mice away from a shop: A three-pronged approach of exclusion, cleaning, and professional monitoring. A mouse can squeeze through a gap the diameter of a pencil (around 6mm). Seal doors, gaps around pipes and cables. Secure all food in airtight containers. Manage waste rigorously. Never leave full bin bags next to bins.
Do rodents only infest older buildings? No. All buildings, including brand new modern structures, are susceptible. Modern vulnerabilities include piping and utility voids, construction defects, the construction site factor (rodents present before construction), and shared spaces in high-rise buildings and retail parks.
Will lights keep mice away? No. Mice adapt to constant light, prioritise food and warmth over light aversion, and travel through hidden pathways unaffected by lighting.
Why are there mice in my office? Desk eating is the single biggest cause. Also: poor kitchen hygiene, improper food storage, and unsealed bins. Mice prefer warm, dark, dry environments and nest near heat sources.
We work with businesses across the North East, from single-site restaurants and cafes to multi-site warehouse operations, hotels, healthcare facilities, schools, and rental properties.
We use advanced treatment methods that go beyond standard baiting programmes.
RapidPro Mouse Riddance: A unique acute rodenticide that eliminates mice after only one feed. Tamper-resistant bait stations containing RapidPro are strategically placed. After just one feed, it acts on the rodent's central nervous system, putting the mouse to sleep quickly and permanently. Benefits include fast action after a single feed, getting premises back to normal quickly, reduced risk of accidental poisoning compared to traditional rodenticides, and high effectiveness where mice have become resistant to conventional anticoagulant baits.
ResiConnect Home Mouse Alarm (RADAR Technology): An early warning system for mouse activity using RADAR (Rodent Activated Detection And Riddance) technology. Discreet advanced traps are installed in high-risk areas. Each RADAR trap has an entrance at each end. When a mouse breaks two consecutive infrared beams, it trips a circuit that closes both entrances. Carbon dioxide gas is released as a bait-free method of control. The mouse remains completely isolated with no contamination risk.
Once captured and eliminated, a signal is sent to a control panel which dispatches a technician automatically. The control panel has its own SIM card, so no home WiFi is needed. All reports and recommendations are recorded on a 24/7 accessible online portal.
Key RADAR benefits:
When DIY may be sufficient: A single mouse sighting in an outbuilding, garage, or shed with no signs of an established population. A well-placed snap trap baited with peanut butter, placed against a wall where droppings have been found, may catch a lone mouse.
When you need Wynyard Pest Control: If you are finding droppings in multiple locations, hearing scratching in walls or under floors, or catching mice repeatedly without the problem stopping, you are dealing with a breeding population. A single pair of mice can produce up to 80 offspring per year. Properties across Hartlepool, Middlesbrough, and Darlington commonly need professional treatment when DIY trapping fails to keep up with the breeding rate.
Common natural mouse repellents do not effectively resolve a mouse infestation. Understanding why they fail helps avoid wasting time and money on ineffective approaches.
Mothballs: The naphthalene in mothballs is present in far too small an amount to affect rodents. Even if temporarily irritated, mice will simply gnaw another entrance to avoid the area.
Peppermint oil: While mice have a keen sense of smell, peppermint oil will not get rid of mice. The scent eventually dissipates. It may freshen the home and mask the smell of an infestation but will not eliminate it.
Ultrasonic rodent repellers: Long-term effectiveness has always been questionable. Ultrasonic sound is absorbed by furniture and solid objects, creating dead spots throughout the space. The potential for food and shelter always outweighs the sound irritation.
Getting a cat: Cats may instinctively hunt mice, but a well-fed pet is rarely effective mouse control. Many cats bring live mice into the house rather than eliminating them.
Natural repellent plants: Not potent enough to prevent or eliminate an active infestation.
Professional exclusion, rodent proofing, and sanitation remain the only reliable long-term approaches to mouse control.
Gardens provide shelter and readily available food sources for mice and voles. While their numbers rarely build up enough to cause serious damage, they can still be a nuisance and carry diseases such as Salmonella, Leptospirosis, Weil's disease, and Cryptosporidium.
Garden species: In addition to the house mouse, several native species frequent UK gardens. The wood mouse (Apodemus sylvaticus) inhabits woodland and hedgerows and occasionally enters indoors. The bank vole (Myodes glareolus) prefers woodland, hedgerows, and earth banks. The field vole (Microtus agrestis) lives in rough grassland.
Signs of mice and voles in the garden: Torn paper in garden sheds (nesting material), small gnaw marks on fruits such as growing strawberries and stored apples, small fruit scattered on the ground under plants, and shallow tunnel systems creating soft, uneven surfaces on lawns and soil (voles).
Damage from garden rodents: Eating recently sown vegetable seeds (peas, beans, sweet corn) and seedling foliage. Eating bulbs and corms, especially recently sown ones. Eating fruits including strawberries (even before ripe). Voles eat the bark of woody plants, especially in winter, and make networks of shallow tunnels that give lawns an uneven surface.
Garden disease transmission: Contamination from rodents in the garden can occur through direct contact with urine, faeces, or saliva; handling or inhaling contaminated particles when disturbing compost heaps or woodpiles; scratches or bites; and dogs and cats catching or eating rodents, allowing parasites to cross-infect pets and people.
Garden prevention: Do not scatter bird feed on the ground; use a bird table or feeder basket and clear away before dusk. Cover food waste in compost heaps. Keep bins with tightly fitted lids. Remove potential nesting places by keeping gardens clean and tidy. Remove piles of wood and garden clippings. Cut back overgrown areas and keep lawns short. Seal gaps around sheds and outbuildings.
Wood mice, yellow-necked field mice, and voles rarely build up in large enough populations in gardens to become serious pests. Professional control is usually not necessary for these species unless numbers are causing significant crop or property damage.
"Mice in the kitchen for weeks and the shop-bought traps did nothing. The technician found where they were getting in, treated the problem, and sealed every gap. Completely sorted within three weeks."
Laura D., Darlington

We are full members of the National Pest Technicians Association (NPTA). This means our technicians meet strict training and competency standards, carry appropriate insurance, and follow the association's code of practice. NPTA membership is your assurance that the work is carried out professionally and responsibly.
Every job is different. The cost depends on the type of pest, scale of the problem, and what treatment is needed. We provide a free assessment and an honest quotation before any work begins. No hidden costs, no surprises.
View our pricing guideEvery mouse treatment is backed by our elimination guarantee. We assess the scale of the problem, plan the right number of visits, and carry out treatment until the infestation is fully resolved. If activity returns after our treatment programme, we come back and re-treat at no extra cost.
Mouse droppings are 3 to 8mm long, granular, and scattered randomly. Rat droppings are larger (10 to 20mm), darker, and spindle-shaped. Mouse gnaw marks are smaller and more shredded in appearance. A mature mouse can be distinguished from a young rat by its larger ears and longer tail relative to body length. Our technicians will identify the species during the survey visit.
We offer same-day emergency response for urgent mouse infestations across the North East. A typical treatment programme involves 3 visits over 4 to 6 weeks to fully resolve the problem and confirm clearance.
House mice typically live 9 to 18 months, but indoors with shelter and food access they may live longer. They reach sexual maturity at 8 to 12 weeks and can have 7 to 8 litters per year with up to 16 young per litter.
Yes. Mice carry Hantavirus (a respiratory disease contracted by inhaling dust from droppings), Lymphocytic Choriomeningitis (LCMV), and Salmonella. They also spread disease through ticks, fleas, and mites. Their droppings and urine contaminate food and surfaces.
No. Once mice have established shelter and warmth, they are highly unlikely to leave simply because a food source is eliminated. Cleaning is an important part of prevention and making treatment more effective, but it will not resolve an active infestation on its own.
Mice are naturally nocturnal. Seeing a mouse during daylight is generally a strong indicator of a heavy or rapidly growing infestation where competition is forcing weaker individuals to forage outside normal hours.
Yes. We use tamper-resistant bait stations that are locked and placed in secure locations. All baits contain Bitrex, a powerful bittering agent. For completely chemical-free treatment, our RADAR CO2 trap system uses no poison at all.
They can have limited, short-term effects in very small spaces, but they are not a reliable solution for established infestations. Ultrasonic sound is absorbed by furniture and solid objects, creating dead spots. Rodents quickly become accustomed to the sound. Professional exclusion and proofing are the only guaranteed methods.
No. It is illegal to use anticoagulant rodenticides to control field mice (Apodemus sylvaticus) due to the high risk of secondary poisoning to wildlife. This makes accurate species identification essential before any treatment begins. Our technicians identify the species on the first visit.
The cost depends on the size of the property, the severity of the infestation, the species involved, and the number of visits required. We provide a fixed quote after the initial survey with no hidden charges.
We provide mouse control services across the North East of England.
Free survey and quotation for businesses and homeowners. No obligation, no pressure.
Most enquiries receive a response within 2 hours.