Mouse inspection

Whether you have heard scratching in the loft or found droppings in the kitchen, a formal inspection provides a clear roadmap for eradication and long-term proofing. In the UK’s terraced and semi-detached housing stock, mice often move between properties, making a professional assessment vital to stop the cycle.

What Does the Work Involve?

• Internal Void Check: Inspecting lofts, roof voids, underfloor spaces, and service risers for droppings, nesting materials, and "smear marks" (grease from fur).
• Kitchen & Utility Audit: Detailed search behind kickboards, under sinks, and around integrated appliances where heat and food sources are concentrated.
• External Perimeter Survey: Checking air bricks, weep holes, damaged brickwork, and gaps around waste pipes for potential entry routes.
• Entry Point Mapping: Identifying and marking specific structural defects that require "proofing" (sealing) with wire wool, mesh, or specialist sealants.
• Monitoring Setup: Placing non-toxic tracking dust, gel, or bait boxes in high-activity areas to confirm movement patterns.
• Reporting: Providing a written summary of findings, risk levels, and a tailored treatment plan or proofing estimate.

Typical Costs

Prices for a mouse inspection vary based on your location in the UK and the size of the property. Most pest control companies charge a fixed fee for the initial survey, which may be deducted from the total cost if you proceed with a full treatment plan.

Costs are generally higher in London and the South East. If the inspection reveals a heavy infestation requiring specialist "deep cleaning" or loft insulation removal due to contamination, these services are quoted separately.

How Long Does It Take?

• Standard Terrace/Semi: 1 to 1.5 hours for a full internal and external walkthrough.
• Large Detached/Period Property: 2 to 3 hours, particularly if there are multiple cellar rooms or complex roof structures.
• Follow-up Monitoring Check: 30 to 45 minutes, usually conducted 7–14 days after the initial inspection.

DIY or Professional?

While you can buy traps at a hardware store, DIY efforts often fail because they treat the symptom rather than the cause. Mice can squeeze through gaps as small as 6mm (the width of a pencil); a professional has the training to spot these obscured entry points that homeowners often miss.

Professional pest controllers have access to higher-grade monitoring equipment and legal rodenticides not available to the general public.

If you live in a flat or a terraced house, a professional is essential to determine if the mice are coming from a neighbouring property, which may require a coordinated approach or landlord intervention.

Choosing the Right Tradesperson

• Check Accreditations: Look for membership in the British Pest Control Association (BPCA) or the National Pest Technicians Association (NPTA).
• Verify Qualifications: Ensure the technician holds an RSPH Level 2 Award in Pest Management.
• Insurance: Confirm they have public liability insurance (minimum £2 million is standard).
• Questions to Ask:
  • Do you provide a written report with photographic evidence of entry points?
  • Are your monitoring methods safe for households with pets and children?
  • Do you offer a guarantee on your proofing work?
  • Will you check the loft and sub-floor voids as part of the standard fee?

UK Regulations

• CRRU Code of Best Practice: Professionals must follow the Campaign for Responsible Rodenticide Use to protect non-target wildlife.
• COSHH: The Control of Substances Hazardous to Health regulations apply to any chemicals or baits used on your property.
• Wildlife and Countryside Act 1981: Pest controllers must ensure that proofing measures do not inadvertently trap or harm protected species like bats.
• Paperwork: You should receive a "site folders" or digital report detailing what products were used and where they were placed.

Common Problems

• Inaccessible Areas: If the loft hatch is blocked or floorboards can't be lifted, the inspection is incomplete. Clear these areas before the tradie arrives.
• Treating the Symptom: Putting down traps without sealing entry points (proofing) results in a "revolving door" infestation.
• Hidden Damage: Mice often chew through plastic plumbing pipes (Speedfit); an inspection should check for signs of slow leaks caused by gnawing.
• Neighbouring Issues: In UK terraces, mice often travel through the "party wall" or shared roof voids, meaning your house may be clean but still vulnerable.

Frequently Asked Questions

Do I need to leave the house during a mouse inspection?

No. A standard inspection is non-invasive and does not involve the "fogging" or spraying of heavy chemicals. You can stay in the property while the technician works.

I’ve only seen one mouse—is an inspection still necessary?

Yes. Mice are nocturnal and secretive; seeing one during the day often suggests a larger population is already established nearby. Early detection is much cheaper than a full-scale removal.

Are the baits and monitors safe for my dog/cat?

Professional technicians use tamper-resistant bait stations that are designed to keep pets and children out. Always disclose the presence of pets before the inspection begins.

Will the inspector kill the mice during the visit?

The primary goal of an inspection is assessment. While they may set traps or bait during the visit, "killing" the mice is part of the subsequent treatment phase, not the initial survey.

What is 'proofing' and is it included in the price?

Proofing is the physical blocking of entry points. Most inspectors provide a quote for this after the survey, though minor gaps might be filled for a small extra charge during the visit.