Why Willesden's Rats Often Arrive From Below
Most of these streets went up between the 1880s and the First World War, and much of the drainage is still the original clay: short pipes with mortared joints running from the back addition, out under the garden, to the sewer in the road. Clay is hard-wearing but brittle. Open one joint and a brown rat living in the sewer has a way into the soil beneath your house, and from there the ventilated void that the Pest Control Willesden page describes takes it wherever it likes.
Old connections nobody has looked at in decades
Indoor bathrooms, back-addition kitchens and later rear extensions all meant drains being re-routed. Redundant branches were sometimes left in the ground rather than sealed properly, a gully was paved over, or a new soil pipe was cut into a run without a tight joint. Each of those is an opening under the floor rather than a hole in a wall, which is why activity can build up with nothing to find outside. How rats get into homes sets the underground routes beside the ones above ground.
Cellars and lower-ground rooms
A good number of Willesden houses have a cellar under the front room, often with a brick or earth floor, an old chute and the drain run passing close by. It is dark, undisturbed and usually full of things nobody moves, so it is the first place a rat that has come up through the ground tends to settle. Where a house has been converted, that space may now be a lower-ground flat with a kitchen and shower room of its own on the same old pipework.
Back gardens, sheds and the shared alley
Not every rat comes up a pipe. The side alleys and rear passages between terraces, with wheelie bins standing in them, give a sheltered run the length of the block, and a shed base or a compost bin at the end of the garden gives somewhere to nest. A rat in the garden is not proof of one indoors, but it does mean food and cover are close at hand.
Signs That Point at the Drains
- Scratching or thumping under the ground floor when there is no gap to be found outside
- Droppings in the cellar, or on the steps down to it, with none upstairs
- A sunken patch of paving, or a dip in the lawn, along the line of the drain run
- An inspection cover that no longer sits flush, or fresh soil pushed up around it
- A stale, sour smell at the back of a lower-ground kitchen or a cupboard built over the pipe run
The first signs of rats goes through droppings, smears and gnawing properly. Grain-sized droppings in a kitchen cupboard are a different animal, and mouse control in Willesden is the booking for those.
Why a Drain Fault Is Not the Same Job as a Gap
Treatment deals with the rats that are in the property now. Where they are getting in through broken drainage, the repair is a drainage contractor's work: a camera survey to find the fault, then a repair, a lining or a one-way rat blocker fitted inside the pipe. Filling around a waste pipe indoors will not trouble rats passing underneath it, and that is the honest reason these are two separate trades. Rats and drains explains what a survey usually turns up.
Where the route really is a gap — a cracked air brick grille, an oversized hole cut for a boiler pipe, a worn threshold on the alley door — rodent proofing in Willesden is the right follow-up, and rat proofing covers what is worth closing.
Booking Rat Control in NW10 and NW2
What to say when you call
Tell us whether it is a whole house or a flat in a converted one, whether there is a cellar, and where you have heard or seen activity: under the floor, in the cellar, out in the garden or up in the loft. Mention any drainage work or recurring blockage from recent years, because that history often points straight at the route.
Getting ready
Clear the cupboard under the sink and anything stacked against the cellar door, and make the side alley walkable so the back of the house can be reached.
Afterwards
You will be told what was found and what needs to happen next, including whether a drainage contractor is your next call. Timescales depend on the property and on how settled the rats are, which this guide to timing explains. Get back in touch if scratching returns after a quiet spell.
Keeping Rats Out of a Willesden Terrace
Once they have gone, the aim is to leave nothing easy. Keep bin lids down, bags off the alley floor and food waste out of the compost heap, and clear the space under the shed. Have a damaged air brick grille replaced rather than blocked, and get the drain run checked if nobody has ever looked at it. Neighbouring Kensal Green sits on much the same Victorian drainage, and Rat Control Brent covers the borough as a whole.
