Moving Into a Property with an Existing Infestation: Where Do You Stand?
Moving into a property with an existing infestation puts a tenant in a stronger position than a buyer. Photograph and date the evidence on the day you find it, report it in writing at once, and keep every reply. The timing of discovery decides whose problem it is, so the record you make in the first week is the case.
What should you do in the first few days?
Record and date the evidence before you do anything else, because the timing of discovery is what determines whose problem it is. Five actions, in order:
- Photograph everything, with the date in the file data. Droppings, live insects, bites, gnawing, mattress staining. Wide shot first, then close-up.
- Write a dated note of what you found, where, and what condition the room was in. A contemporaneous note is evidence; a memory three months later is not.
- Report it in writing the same day to the landlord, letting agent or, if you have bought, your solicitor. Email, not a phone call.
- Do not clean or clear the area yet. Removing the evidence removes the proof of when it was there.
- Get an identification. A professional inspection naming the species and the extent is the most useful document you can obtain, because extent indicates how long a population has been established.
Where does a tenant stand if the infestation was there before the tenancy began?
A tenant who finds an infestation that was present at the start of the tenancy is normally in a strong position, particularly where the pests are entering through disrepair. A landlord of a short residential tenancy must keep the structure and exterior of the dwelling in repair, along with the installations for water, gas, electricity, sanitation and heating. Where rodents are entering through a broken airbrick, a defective drain or a gap at a soil pipe, the entry route is the landlord's repairing obligation whatever the tenancy agreement says about pest control.
What can the council do if the landlord does not act?
A council can act on pests in a rented home in its own right, on a route that does not depend on the tenancy at all. The Housing Health and Safety Rating System (HHSRS) treats domestic hygiene, pests and refuse as a rated hazard, so a council environmental health team can inspect the property, assess the hazard and act where it is serious enough, whatever the tenancy agreement says. A landlord told in writing on day three that there are cockroaches behind the kitchen units is facing a pre-existing condition; the same landlord told in month four is entitled to ask what changed. Tenancy disputes turn on their own facts, so take advice from Citizens Advice or a housing solicitor on your own case.
Where does a buyer stand if the infestation was there at completion?
A buyer's position is harder, because caveat emptor applies to the condition of a property in England and Wales. The buyer is expected to inspect and survey, and the seller is not generally obliged to volunteer information about a pest problem, so discovering mice a fortnight after completion is usually not, on its own, a claim.
The exception is what was said. A false statement of fact that induces a party to enter a contract can give rise to a claim for damages, and in some circumstances to rescission of the contract itself. Conveyancing runs on the Law Society's TA6 property information form, which asks direct questions about condition, disputes, complaints and notices, so an untrue answer to a question touching the infestation is a positive statement rather than a silence.
A second route exists where a trader was involved. Misleading actions and misleading omissions in dealings with consumers are prohibited, and that prohibition binds traders such as estate agents and developers rather than a private individual selling their own home. An agent who knew about a cockroach problem in the block and said nothing when asked is therefore in a different position from a departing owner.
Why does the check-in report or inventory matter so much for a tenant?
The check-in report is the document that fixes the condition of the property on day one, which is exactly the fact a pest dispute turns on. Prepared at the start of a tenancy, it records the state of each room, usually with photographs, and is normally signed by the tenant. Where it records droppings under the sink or gaps at the pipe runs, the pre-existing condition is documented before anybody is in dispute.
Most check-in reports say nothing about pests, which is why ten minutes of your own photographs on moving-in day is worth more than it looks. Photograph inside the kitchen cupboards, under the sink, behind the washing machine, the back of bathroom panels and the mattress seams. Timestamped photographs are the closest thing a tenant has to a dated baseline, and they matter most in high-turnover housing. In short lets in Kensington and Chelsea and flat-shares in Hackney, occupants change often and bed bugs travel with luggage rather than with disrepair, so "it was here before I arrived" is a common and frequently correct claim.
When did the infestation begin, and what does that mean for you?
The date an infestation began is the fact that decides everything else, and different evidence proves it for a tenant and for a buyer.
| When the infestation began | Your position as a tenant | Your position as a buyer | What evidence decides it |
|---|---|---|---|
| Clearly established before you moved in | Strong; a pre-existing condition, and the landlord's repairing duty applies where entry is through disrepair | Weak, unless a question was answered untruthfully | Technician's report on extent; dated moving-in photographs |
| Present at the start, found weeks later | Still arguable, weakened by the delay | Weak; the survey was your opportunity | Extent recorded at first report; the check-in report |
| Genuinely began after you moved in | Landlord's duty still applies where entry is through disrepair | Yours; caveat emptor applies to condition | Entry route identified by the technician |
Should you treat it yourself now and argue later?
For bed bugs and cockroaches, treating now and arguing later is usually the right call, because delay makes those two jobs materially larger. Both species reproduce steadily indoors, so a job caught in the first fortnight is smaller than the same job caught in the second month.
The trade-off is plain: pay, and you are out of pocket and seeking reimbursement, which depends on the landlord's cooperation or on a claim; wait, and you are in the right and living with the infestation. For bed bugs in a rented flat, waiting is the expensive option.
Where you do pay, protect the claim: get the report in writing, keep the invoice, and tell the landlord in writing before the work is booked that you are instructing a contractor because the problem was reported and not resolved. 247 Pest Control publishes bed bug control from £234 as a starting point for a straightforward domestic treatment, and names pest type, property size, infestation level, visits needed, treatment method, access and urgency among the variables that move a figure. The published list does not state whether VAT or a callout fee is included, or how many visits a price covers.
How quickly can you get someone out, and what happens at that visit?
An inspection can usually happen sooner than a treatment, and that distinction is worth knowing before you call. 247 Pest Control states that same-day attendance is available across London and that it responds to emergency enquiries 24/7, while noting that attendance time cannot be identical for every call. The purpose of that visit is to establish what the pest is, what treatment the property actually needs, and the soonest date the work can be done.
For someone moving into a property with an existing infestation, that visit does double duty: it produces the treatment plan, and a dated professional record of what was present. Speed of response earns its place here for a second reason: the sooner the visit happens and the treatment is completed, the closer that record sits to the day you arrived.
What evidence should you keep either way?
Keep six things, whether or not you end up paying:
- Dated photographs from the day of discovery and from moving-in day.
- Your written report to the landlord, agent or solicitor, with the date sent.
- Every reply, including the ones that ignore the point.
- The technician's report naming the species, locations and assessed extent.
- The invoice for any treatment you paid for.
- The check-in report or inventory, plus the tenancy agreement or TA6 form.
That file is what a council officer, a deposit adjudicator or a solicitor will ask for.
Frequently asked questions
Can a tenant withhold rent because of an infestation?
Withholding rent is risky and can put a tenant in arrears, with its own consequences. The safer route is to report the problem in writing, allow a reasonable period for repair, and involve the council's environmental health team, which can assess pests as a rated hazard under the Housing Health and Safety Rating System. Take advice from Citizens Advice before withholding anything.
Is a landlord responsible for bed bugs that were in the flat before I moved in?
Often yes in practice, but the legal route differs from rodents. The landlord's repairing duty covers pests entering through disrepair, and bed bugs usually arrive with furniture or luggage rather than through a defect. Where the infestation was present when the tenancy began, the argument is about pre-existing condition, which is why dated moving-in photographs matter so much.
Can I claim against the seller for an infestation found after completion?
Possibly, but only where something untrue was stated. Caveat emptor applies to condition, so silence alone is usually not actionable. A false answer to a direct question on the Law Society's TA6 property information form is different, and a false statement of fact that induced you to buy is the usual route to a claim. A conveyancing solicitor should assess the facts of your own purchase.
Does the council have to do anything if I report an infestation after moving in?
The council can inspect, and it has enforcement powers where the hazard is serious enough. A local authority can inspect a dwelling and assess domestic hygiene, pests and refuse as a rated hazard under the HHSRS, then require the landlord to deal with it. An occupier must also notify the local authority of a substantial rat or mouse infestation.