Pests in a rented flat

Why acting fast beats arguing first

While the conversation about who pays is going on, the colony keeps growing. For bedbugs that means hundreds of new individuals within a month and spread into neighbouring flats.

In practice it is almost always better to solve the problem first and settle the cost afterwards, rather than the other way round. A delayed treatment costs more for both sides, and it also raises the risk of the landlord facing a claim from the neighbours.

What to record straight away

Whatever is eventually agreed about cost, it is worth documenting the situation immediately:

• Photograph the insects, the bites and the signs, with the date.
• Tell the landlord in writing — by message or email, not only verbally. That fixes the moment the problem was identified.
• Keep the correspondence and any documents relating to the treatment.

If the tenancy has only just started and insects appear in the first weeks, that is a significant circumstance — the problem most likely existed before you moved in.

Common scenarios in practice

• The insects were there before you moved in. If they appear in the first weeks, the source has almost always been in the flat already or is in a neighbouring one. In practice the landlord usually covers the cost in these cases.
• The insects are coming from the neighbours. This is a building problem rather than a flat problem, and the route to solving it runs through the building manager. See pests from neighbours.
• The insects were brought in during the tenancy. For example with second-hand furniture or after a trip. In these cases the practical outcome is more often that the tenant pays or the cost is shared.

None of these are rules. They are what tends to happen when both sides are reasonable, and they are a useful starting point for the conversation.

Practical steps for a tenant

1. 1

   Photograph everything

   before you touch anything, with the date visible.

2. 2

   Write to the landlord the same day.

   A short factual message: what you have found, where, and when it started.

3. 3

   Propose a solution, not just a problem.

   A message that says the flat needs treating and asks how they would like to arrange it gets a faster answer than one that only reports insects.

4. 4

   Do not spray shop aerosols in the meantime.

   It makes the eventual professional treatment less effective and harder to justify as someone else's cost.

5. 5

   Keep the flat accessible.

   Whoever books it, the treatment needs someone to let us in.

For landlords

For a landlord, an infestation in a rental property is both a cost and a reputation question, particularly where the flat is let frequently.

Preventive treatment of an empty flat between tenants is significantly simpler and cheaper than treating an occupied one: nothing has to be cleared, no times have to be coordinated, and the result is more complete because every surface is accessible.

For properties with frequent tenant turnover this effectively removes the situation where a new tenant reports insects in their first week — which is the version of this problem that costs the most in goodwill. See pests after moving in.

One further point that matters in a block of flats: an untreated infestation in a rental property does not stay contained. Cockroaches and bedbugs move along the riser, and a landlord who leaves it can end up dealing with the building manager and several neighbouring owners rather than with one tenant. Dealing with it early is materially cheaper than dealing with it late.