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Cockroaches

Cockroaches near you

Cockroaches are uncommon in British detached houses and much less uncommon in flats, older converted properties and anywhere sharing a wall, a riser or a refuse store with a food business. They live in warm, humid, undisturbed places — behind and under appliances, in the void around a boiler, inside kitchen unit carcasses and along service runs — and they move between dwellings through the same routes.

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That is what makes them different from most household pests as a legal matter. A cockroach problem in a block is often not contained within the flat where it is being seen, and the occupier who calls a firm may be treating the symptom of a population living somewhere they have no access to. Part 3 of the Environmental Protection Act 1990 is the machinery that exists for that situation, and it contains a trap worth knowing about before you rely on it.

Practically, cockroach control is a monitoring exercise as much as a treatment. The insects are nocturnal and secretive, so the honest measure of whether a job has worked is what sticky monitors catch over the following weeks, not whether anyone has seen one in the kitchen. A firm that leaves monitors and comes back to read them is doing the work properly; one that treats once and declares victory is guessing.

What a cockroach problem looks like before you ever see one

  • Droppings resembling coarse ground pepper or fine dark specks in cupboard corners, along runs and behind appliances.
  • Smear marks in humid areas where surfaces are frequently crossed, which show as irregular dark streaks.
  • Shed skins and empty egg cases lodged in tight cracks, under unit plinths and behind loose kick boards.
  • An oily, musty smell in a kitchen or utility area that persists after cleaning and is strongest near an appliance.
  • Insects visible for a moment when a light is switched on at night, which usually means a substantial population.
  • Activity concentrated around warmth and water: behind the fridge motor, under a dishwasher, around a boiler or a riser.
  • Sightings in a communal bin store or stairwell, which points at a building problem rather than a flat problem.

Statutory nuisance: what the council can do, and the trap in section 79(1)(fa)

Part 3 of the Environmental Protection Act 1990 defines statutory nuisances, and the paragraph that does the work for an infestation is section 79(1)(a): any premises in such a state as to be prejudicial to health or a nuisance. Every local authority has a duty to cause its area to be inspected from time to time to detect statutory nuisances and to investigate complaints made by people living in its area, and where it is satisfied a statutory nuisance exists it serves an abatement notice on the person responsible.

The trap is the insect paragraph. Section 79(1)(fa) covers insects, but only insects emanating from relevant industrial, trade or business premises and being prejudicial to health or a nuisance. Cockroaches coming from a neighbouring flat are not caught by that paragraph, because a flat is not industrial, trade or business premises. Complaints framed as an insect nuisance under (fa) therefore fail when the source is domestic, while the same facts can succeed under (a) because the state of the premises is what is being complained about.

There is also a route that does not depend on the council acting. Under section 82, a person aggrieved by a statutory nuisance may apply to a magistrates' court directly, but written notice of the intention to bring proceedings has to be given to the person responsible first, and for a nuisance other than noise or smoke that is not less than twenty-one days' notice. That is a real option where a managing agent or a neighbouring owner will not engage, and the notice period is the part people most often get wrong.

Monitoring first, treatment second: how a proper programme runs

The first visit should establish where the population actually is, and the tool for that is sticky monitors placed at the harbourages rather than in the middle of the floor: under and behind appliances, inside unit plinths, around pipe entries and near any warm service run. Monitors give a count over time, which is the only way to tell an improving population from a quiet week, and they show whether the source is inside the dwelling or arriving from elsewhere.

Treatment is then typically gel bait placed in the cracks and voids the insects use, sometimes with a residual applied to runs, and it is repeated. Gel is used in preference to broadcast spraying in kitchens for a reason: it goes where the insects are rather than where people prepare food, and it is carried through the population. Spraying over gel destroys the bait's attractiveness, which is a common and avoidable way to set a programme back.

The measure of success is the monitor count falling to nothing and staying there over a run of visits. Ask at the outset how many visits are included, what the monitor readings will be reported as, and what happens if the count stops falling — because a plateau usually means an untreated reservoir somewhere adjacent, and that is a conversation with a landlord or managing agent rather than another gel application.

Why a flat keeps getting reinfested after a successful treatment

  • The source is a neighbouring flat, a communal riser or a bin store that was never treated at the same time.
  • Service penetrations between dwellings were never sealed, so the treated flat simply repopulates from the void.
  • A commercial unit on the ground floor shares a service run with the residential flats above it.
  • Someone sprayed over the gel bait, which stops it being taken and wastes the visit.
  • Cardboard and packaging accumulating in a warm cupboard provides fresh harbourage as fast as it is removed.
  • Treatment was timed around a single sighting rather than run as a monitored programme with repeat visits.
  • A leak under a sink or behind an appliance keeps one small area humid enough to sustain a residual population.

Removing the warmth, water and harbourage they depend on

  • Fix dripping taps, weeping traps and condensation traps, because water is the resource they can least do without.
  • Clear the void behind and beneath appliances and clean the warm underside of the fridge and freezer.
  • Take cardboard packaging out of warm cupboards, since corrugated board is close to ideal harbourage.
  • Seal gaps around pipes at kitchen and bathroom walls, which are the doorways between flats in a block.
  • Fit and keep kick boards and unit plinths closed, and clean under them rather than treating them as sealed.
  • Keep communal bin areas clean and closed if you live in a block, and raise it with the agent if they are not.

What drives a cockroach treatment quote, and how LokalMatch fits in

Cockroach work is priced as a programme rather than a call-out, and that is the first thing to check in a quotation. The variables are how many rooms and voids are involved, how far the population has spread beyond the kitchen, whether appliances and units have to be moved or partly dismantled to reach the harbourages, how many monitoring and treatment visits the programme runs to, whether the property is a flat where adjoining dwellings or communal areas may also need work, and whether proofing of service penetrations is included or left for someone else.

What LokalMatch does is make the introduction. Describe the situation once with your postcode — flat or house, which rooms, how long, and whether neighbours have the same problem — and pest control firms covering your area get in touch with you directly. There is no charge to homeowners; the pros pay for the requests they receive. LokalMatch does not carry out treatments, does not set prices and does not vet, rank or recommend any firm that responds, so the comparison of visit counts and monitoring is yours to make.

Cockroaches: frequently asked questions

Cockroaches are coming from the flat next door. Can the council make them deal with it?

It can act, but under the right paragraph. Section 79(1)(a) of the Environmental Protection Act 1990 covers premises in such a state as to be prejudicial to health or a nuisance, and a council satisfied that a statutory nuisance exists serves an abatement notice on the person responsible. The insect paragraph, section 79(1)(fa), will not help you here, because it is limited to insects emanating from relevant industrial, trade or business premises, and a neighbouring flat is none of those.

What if the council will not act?

Section 82 of the Environmental Protection Act 1990 lets a person aggrieved by a statutory nuisance apply to a magistrates' court themselves. You must first give the person responsible written notice of your intention to bring proceedings, and for a nuisance other than noise or smoke the period is not less than twenty-one days. Getting that notice and its timing right matters, because the application can fail on the notice alone.

How will I know the treatment has worked?

By the monitor counts, not by the absence of sightings. Cockroaches are nocturnal and hide in voids, so not seeing one proves very little, particularly in the weeks after a treatment. A properly run programme places sticky monitors at the harbourages on the first visit and reads them at each return, and success is a count that falls to nothing and stays there across several visits. Ask for the readings rather than a verbal all-clear.

Can I use a spray or a fogger alongside the gel the technician left?

No — it usually undoes the treatment. Gel bait works because the insects find it more attractive than anything else available and carry it back into the population. Spraying insecticide over or near it contaminates the bait so it stops being taken, and a fogger drives insects deeper into voids rather than killing them. If you think more is needed, that is a conversation with the technician before the next visit.

Do cockroaches mean the flat is dirty?

Not necessarily, and in a block it very often means nothing about the flat at all. They need warmth, humidity and harbourage more than they need mess, and they travel between dwellings along shared pipework, risers and wall voids. A spotless flat above a warm service run can have a persistent problem while the flat next door has none. What cleaning does change is how fast a treatment works, by removing competing food and hiding places.

Sources

  1. Environmental Protection Act 1990, section 79 (statutory nuisances; the duty to inspect; the insect paragraph 79(1)(fa))
  2. Environmental Protection Act 1990, section 82 (summary proceedings by a person aggrieved; twenty-one days' notice)
  3. GOV.UK: Pest control on your property

Written by the LokalMatch editorial team. Last reviewed 21 September 2026. How we write and check our guides

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What affects the cost of cockroach control

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of pest or animal
  • How widespread the problem is
  • Size of the home and number of units affected
  • Treatment method
  • Number of follow-up visits
  • Exclusion work, such as sealing gaps or installing barriers

How to compare exterminators before you hire

  • Choose a company that inspects first and identifies the pest before recommending treatment.
  • Ask whether they are licensed to apply pest control products in your area.
  • For wildlife like raccoons, squirrels or birds, look for a company that uses humane removal and seals entry points.
  • Ask how they'll keep children, pets and food safe during and after treatment.
  • Get the treatment plan in writing, including follow-up visits and what happens if the problem comes back.

Questions to ask exterminators before you hire

  • What pest do you think this is, and how did you identify it?
  • Are you licensed to apply pest control products in my area?
  • What products or methods will you use, and are they safe around children and pets?
  • How do I need to prepare my home before treatment?
  • How many visits are included, and what happens if the problem comes back?
  • Will you seal entry points so the problem doesn't return?

When to call a pro for cockroach control

  • Droppings, gnaw marks or scratching noises in walls or the attic
  • Bites or small blood spots on bedding that could point to bed bugs
  • A wasp or hornet nest near a door, deck or play area
  • An animal living in the attic, chimney or under a deck

Cockroach control permits and local rules

Some cockroach control work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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