Where Kensington and Chelsea's Rats Come From
Old drain runs under Kensington's terraces
The stucco terraces around Kensington were built well over a century ago, and the drainage beneath them is often original or only partially updated. A displaced joint or a hairline crack under the pavement is enough to let a rat move from the sewer into the ground below a kitchen extension, then up through a gap around a waste pipe. Because the activity often starts under a floor with no visible hole outside, it's easy to mistake for something else until the noise or the smell gives it away.
Basement digs disturbing old foundations
Excavating a new basement level under a Chelsea or Kensington townhouse is common, and the work regularly cuts through drain runs and foundations that had been undisturbed for decades. Rats can appear during the dig itself, using the loosened ground and temporary open trenches as a route in, or shortly after, once a repaired section leaves a smaller gap than before. Tell us about any recent building work nearby when you call, since it changes where we look first.
Signs to Look For
- Dark, tapered droppings roughly 1–2cm long, often in small groups
- Greasy smear marks along skirting boards, pipes and the edges of holes
- Gnawing on wood, plastic, food packaging or cables
- Scratching in ceilings, walls or under the floor, mostly at night
- Burrows a few centimetres across in soil, under paving or beside a shed
- A stale, ammonia-like smell in cupboards or under the stairs
Stopping a Kensington and Chelsea Rat Problem Returning
Once the rats are gone, the route they used usually still exists. We'll talk through whether that means a drain repair or a smaller gap our rodent proofing service can close.
