
Behind a Cricklewood terrace there is normally a yard or garden with a paved path down one side, a patio by the back door and a strip of gravel or bare soil against the house wall. Black garden ants want warm, loose, well-drained ground, and that is exactly what is on offer a step away from the kitchen.
When the same trail keeps reappearing at the same skirting, book ant control: £190 for a flat, £220 for a house. Call 0800 955 2347.

The nest is almost always outdoors. The sand bed under patio slabs, the joint where a path butts against the house, the soft mortar at the base of a low garden wall and the warm ground beside a back step are all worth a look. Fine grains of excavated soil heaped over a crack are the clearest evidence, and their reappearing after rain tells you the tunnels below are still being worked. Ground that suits a colony keeps it for years, which is why the trail returns to the same door each summer instead of moving on. Where ants nest around houses lists the other places, and how to find an ant nest shows how to trace one without taking the paving up.

Wherever the nest is, the way in is at floor level. The worn threshold under a back door, the mortar joint where a patio meets brickwork, an air brick low in the wall and the holes drilled for a waste pipe, a condensate pipe or a boiler flue all open into the same place — the void behind the kitchen units. Follow the trail indoors until it slips behind a skirting or under a kickboard, then step outside and study that same point from the other side. Can ants nest inside walls? deals with trails that seem to start nowhere.
Flats over the Broadway units and in converted houses are a different question, because the soil is a long way down. A trail on a first or second floor has climbed a pipe boxing, a cable run or the back of a run of units, following warmth and whatever has been spilled behind an appliance. Very small, pale yellowish ants indoors through the winter are not garden ants at all, but a species that nests inside heated buildings and behaves quite differently — Pharaoh ants vs garden ants explains why that matters before anything is bought for them. Small brown insects that scatter from beneath a kickboard when the light goes on are cockroaches rather than ants.
For a few close, humid days in July or August, colonies release their winged queens and males together, and a paved yard between the terraces can look as though it is steaming. Outdoors that passes in a day or two and asks for nothing beyond keeping the back door shut. Winged ants coming up inside the building — through a floorboard gap, from behind a skirting or around an old hearth — point instead to a nest under the floor, and that is worth mentioning when you book. Why flying ants suddenly appear indoors explains the timing. Insects using one fixed opening in the roofline for weeks on end are a wasp nest and a different job altogether.
Ants may still be visible for a while afterwards, and how long that lasts depends on the size of the colony and how far it runs under the paving; how long ant treatment takes goes into what affects it. If activity has not eased off, get back in touch and describe what you are seeing and exactly where.

With the colony dealt with, the jobs worth doing are all at ground level around the doors. How to stop ants entering your home has the detail, Ant Control Brent covers the rest of the borough, and nearby Kilburn has the same arrangement of yards and back doors.
Ant control in Cricklewood is £190 for a flat and £220 for a house — one figure for the property, not a charge per trail or per room. A flat above a Broadway shop or in a converted house is priced as a flat, whichever floor it is on; a whole terraced or larger house is priced as a house, yard and garden included. We talk through what the visit involves when you call, so nothing has to be worked out on the doorstep.
| Treatment | Price |
|---|---|
| Ant Control – Flat | £190 |
| Ant Control – House | £220 |
Because the colony is settled within a metre or two of it, most often under the patio or in the joint where the path meets the wall. Watch which crack they vanish into and mention it when you book ant control.
It rarely helps. The tunnels usually run wider than a single slab, and disturbing them tends to move the ants along rather than remove them. Look instead for heaps of fine soil at the joints and follow the line of workers back.
Garden ants nest in the ground, so the flat at soil level is the one they reach first. Ant control for a flat is £190, and it is worth telling the flat above in case the trail is climbing a boxed-in pipe.
It suggests the nest is under the floor or against the foundations instead of out by the path. Vacuum them up, keep that door shut for the day, and tell us when you book so we know where to start looking.
Probably not. Very small, pale ants indoors in winter in a heated building are a different species with different habits, and shop-bought sprays can scatter them into more rooms. Describe their size and colour when you call so the right job is booked.
The workers simply re-routed, which is what a colony does when one path stops paying. Why ants come back after DIY treatment explains it, and when an ant problem needs treatment helps you judge whether to carry on trying.
They are a nuisance rather than a structural risk, though a colony working under a patio can wash sand out of the joints over time. A trail crossing food surfaces is worth stopping, and one that returns every few weeks means the nest is settled close by.





















Tell us whether it is a house or a flat, where the ants get in, and your NW2 postcode. Borough-wide prices are on Ant Control Brent, and Pest Control Cricklewood lists the other services here.
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