What to look for
These signs can help inform an inspection. They are not a confirmed identification on their own.
- Droppings resembling black pepper in corners and crevices
- Egg cases (oothecae) behind appliances and under sinks
- A strong, oily musty odour in affected areas
- Smear marks on walls near water sources
- Live or dead cockroaches, particularly at night
What to do next
- Record sightings, including whether they occur at night and near heat or water.
- Close food containers, remove accessible crumbs and report leaks.
- Ask the technician to inspect adjoining rooms and connected units where appropriate.
- Agree monitoring, follow-up and prevention responsibilities in writing.
Questions for a treatment quote
Ask which method is suitable for the identified species and your property. Explain whether children, pets, food preparation or vulnerable occupants need special consideration. Get re-entry and cleaning instructions directly from the appointed professional.
A quote should separate inspection, treatment, follow-up and proofing. Avoid assuming one visit or an advertised guarantee covers every recurrence.
Local context
In a shared London building, activity may involve adjoining flats, communal waste stores or service routes. Give the managing agent a dated record and agree access arrangements before the survey.
Find your borough guideRelated advice
Cockroach Prevention: 10 Steps to Protect Your London Home or Business
Review food containers, crumbs under appliances, leaks, condensation, waste bins, delivery packaging, pipe gaps, warm appliance recesses, shared service ducts and cleaning access.
Read guidePest Control Compliance for London Food Businesses: A Planning Guide
Food premises need an approach suited to their activities.
Read guideFurther information
- NHS: bedbugs and bites
- Government: renting a safe home
- British Pest Control Association: pest advice
- Find your local council
- Safer food, better business for caterers (FSA)
- HSE: rodenticides
Published by Pest Protect London. Updated 9 September 2026. General information; treatment decisions require an assessment of the property. Editorial policy.