Rats in UK Homes: Why Numbers Are Rising in 2026

Pest controllers across the UK are reporting a significant increase in rat-related call-outs in 2026. The British Pest Control Association (BPCA) has warned that a combination of environmental and social factors is driving rat populations higher — and pushing them closer to our homes.

Milder winters are letting more rats survive

Historically, cold winters kept rat numbers in check by killing off weaker animals. But with the UK experiencing increasingly mild winters — the Met Office confirmed that the 2025–26 winter was one of the warmest on record — more rats are surviving through to spring breeding season. A single pair of rats can produce up to 1,500 offspring in a year under favourable conditions.

Urban expansion is shrinking their habitat

As new housing developments spread into previously undeveloped land, rats are being displaced from fields and hedgerows into residential areas. Construction work also disturbs existing burrow networks, forcing rats to seek shelter in nearby homes, gardens, and outbuildings.

Changes to bin collections

Many local councils have moved to fortnightly general waste collections, and some are trialling three-weekly cycles. While this is intended to encourage recycling, it means household waste sits outside for longer — giving rats a reliable food source. Overflowing or damaged wheelie bins are particularly attractive to rodents.

Food waste and compost bins

The rollout of separate food waste collections is a positive environmental step, but poorly managed food caddies and open compost heaps can attract rats. DEFRA recommends using sealed compost bins and never adding cooked food or meat to open compost piles.

How to tell if you have rats

Rats are nocturnal and cautious, so you may not see one directly. Look for these signs:

• Droppings. Dark, pellet-shaped droppings about 10–15mm long, often found along skirting boards, in cupboards, or near food sources.
• Gnaw marks. Rats gnaw constantly to keep their teeth short. Look for tooth marks on wood, plastic, cables, and food packaging.
• Scratching sounds. Particularly at night — in walls, under floors, or in the loft.
• Greasy smear marks. Rats follow the same routes repeatedly, leaving dark smudges along walls and baseboards from the oil in their fur.
• Burrow holes. In the garden, look for holes roughly 6–9cm in diameter near sheds, decking, or compost bins.
• A musty, ammonia-like smell. A strong, unpleasant odour can indicate an established nest nearby.

When to call a professional

While shop-bought traps and bait stations can work for a lone mouse, rats are a different matter. They're larger, more cautious, and can carry serious diseases including leptospirosis (Weil's disease), salmonella, and E. coli. If you suspect rats in your home, professional pest control is strongly recommended.

A qualified pest controller will identify entry points, assess the scale of the problem, and use professional-grade treatments that are more effective — and safer — than DIY methods. Most treatments involve two or three visits over a few weeks to ensure the problem is fully resolved.

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