Confirm what you are seeing
Cockroaches hide by day, so evidence usually shows up before the insects do: droppings like ground pepper, shed skins in cupboard corners, a musty smell that won't shift. A torch check after dark, when activity peaks, tends to confirm things faster than any daytime search, just as near Stanmore, where larger 1930s houses and gardens towards the edge of the borough near the Green.
Flats above Station Road and Wealdstone High Street

Living above a shop on either street means sharing warmth and drainage with whatever business trades below, and a cockroach problem that looks like it's coming up from downstairs usually needs both the flat and the shop dealt with together, since treating only one side rarely settles it.
In your own kitchen

Go methodically through the warm, enclosed spots, behind the fridge, under the sink, around the boiler, and inside the plinths under the units, as anyone near Kenton will recognise, where interwar semis shared between Harrow and neighbouring Brent. If a sink goes unused for a while, top up its trap with water so it doesn't dry out and open a route in from below, as anyone near Pinner will recognise, where classic Metroland semi-detached suburbia with a village-style high street.
If you run a food business
Any food business is legally required, under food hygiene law, to keep proper procedures for pest control running, whether that's near Pinner, where classic Metroland semi-detached suburbia with a village-style high street, or elsewhere in the borough. Keep incoming stock off the floor, inspect boxes as they arrive, and note down where and when sightings happen. Let us know the type of premises and its approximate size when you get in touch, commercial jobs are always quoted individually, just as near Harrow, where the older hilltop core at Harrow-on-the-Hill and the busier streets around Harrow town centre.
What to avoid while you wait
- Spraying at cockroaches you can see, which scatters the rest into walls and next door
- Moving boxes or appliances from an affected kitchen into clean rooms
- Leaving pet food, dirty dishes or standing water out overnight
- Bringing in second-hand appliances without checking them first
Booking cockroach control in Harrow
Cockroach control in Harrow is £190 for a flat and £240 for a house (business premises quoted separately); since around Stanmore, where larger 1930s houses and gardens towards the edge of the borough near the Green, telling us whether you are in a home or a business, and whether neighbouring premises might be affected, when you book cockroach control saves time, and the Harrow cockroach control page has the rest.

