How to Get Rid of Cockroaches in Your Home

Why Cockroaches Are a Health Risk

Cockroaches are one of the most resilient and unpleasant pests found in UK properties. The two species most commonly encountered are the German cockroach (Blattella germanica) and the Oriental cockroach (Blatta orientalis).

Cockroaches carry bacteria including salmonella, E. coli, and dysentery. They contaminate food and surfaces with their droppings, shed skins, and saliva. Their presence is also a known trigger for asthma and allergies, particularly in children.

Cockroaches are nocturnal, so if you are seeing them during the day, the infestation is likely already significant. They reproduce rapidly — a single German cockroach egg case (ootheca) contains 30–40 eggs, and a female can produce one every few weeks.

How to Identify a Cockroach Problem

Cockroaches prefer warm, humid environments close to food and water. Kitchens and bathrooms are the most common locations.

• Live cockroaches — fast-moving, flat-bodied insects found behind fridges, ovens, under sinks, and around boiler cupboards. German cockroaches are light brown (12–15mm); Oriental cockroaches are dark brown to black (20–25mm).
• Droppings — small, dark specks resembling ground pepper or coffee grounds, typically found in drawers, on worktops, and behind appliances.
• Egg cases (ootheca) — small, dark, ridged capsules around 8mm long. Often found in hidden, warm spots near food sources.
• Musty smell — a heavy infestation produces a distinctive unpleasant odour.
• Shed skins — cockroaches moult several times as they grow. Translucent casings may be found near harbourage areas.
• Smear marks — irregular brown marks on walls and surfaces near water sources, left by cockroaches as they move.

DIY Methods: What You Can Try First

DIY cockroach control can help with very minor problems, but cockroaches are notoriously difficult to eliminate without professional treatment.

Gel bait stations from a hardware store can reduce numbers. Place them in cracks and crevices near where you have seen activity — behind the fridge, under the sink, along pipe runs, and inside cupboard hinges.

Thorough cleaning is essential. Cockroaches need food, water, and shelter. Eliminate food debris from behind and under appliances, fix dripping taps, and seal food in airtight containers.

Seal cracks and gaps around pipes, skirting boards, and between kitchen units using caulk. Pay particular attention to gaps around boiler cupboards and where plumbing enters the wall.

Sticky traps can help you monitor the extent of the problem, but they will not resolve an infestation on their own.

When to Call a Professional

If you are seeing cockroaches regularly — especially during the day — or finding evidence in multiple rooms, professional treatment is essential. Cockroaches breed rapidly and are highly resistant to many over-the-counter products.

German cockroaches in particular are extremely difficult to control without professional-grade insecticides and targeted application methods. Contact a professional cockroach control service at the first sign of a problem.

How Professional Cockroach Treatment Works

Professional cockroach treatment is highly targeted and far more effective than DIY approaches.

• Survey — identification of the cockroach species, harbourage areas, and the scale of the infestation.
• Treatment — application of professional gel baits, residual sprays, and insecticidal dust into cracks, crevices, and harbourage areas. The treatment targets cockroaches where they live and breed.
• Follow-up — a second visit is usually required 2–4 weeks later to assess progress and apply further treatment if needed.
• Monitoring — sticky traps may be placed to track remaining activity and confirm eradication.

Preventing Cockroaches from Returning

Prevention is critical after treatment. Cockroaches are opportunistic and will recolonise if conditions allow.

• Keep kitchens scrupulously clean — wipe down surfaces nightly, sweep floors, and clean behind appliances regularly.
• Fix leaking taps and pipes — cockroaches need a water source to survive.
• Store all food in sealed containers and never leave dirty dishes out overnight.
• Seal all cracks, gaps, and entry points around pipes, skirting boards, and kitchen units.
• Take bins out regularly and use bins with tight-fitting lids.
• In flats, coordinate with building management — cockroaches travel between units through shared ducting and pipework.

How Much Does Cockroach Treatment Cost?

Cockroach treatment in London and Essex typically starts from around £120. Most treatments require two visits. Costs may be higher for severe infestations or large commercial kitchens.

BuzzKill provides free assessments with no call-out charge. View our cockroach control service or request a free quote.