Bed Bugs in London Flats and Shared Buildings: A Practical Guide

Bed bugs do not respect front doors. In a London conversion, a purpose-built block or a house split into bedsits, the insects can use the building itself as a highway. This post explains how they move, who needs to know and why a joined-up approach works better than going it alone.

How bed bugs move between homes

Most people picture bed bugs arriving in a suitcase. That does happen, and our post on checking luggage after travel covers it. However, in a block of flats the building offers other routes.

A mark-release-recapture study of bed bugs in apartments released marked insects in six homes. It recovered marked bugs in neighbouring apartments from five of them. The insects reached units above, below, beside and across the hallway.

The same study found that many bugs moved away from the bed within a day. Therefore an infestation does not stay politely in one bedroom. It can spread through a flat and, with time, beyond it.

Common routes in older London buildings include:

• gaps around pipes and cables that run between flats
• shared walls, floors and ceilings with cracks or loose plaster
• lift shafts, stairwells and shared corridors
• shared laundry rooms and storage areas
• second-hand furniture or belongings carried between homes

Why shared housing needs extra care

Houses in multiple occupation (HMOs), bedsits and converted Victorian terraces share walls, floors and often kitchens. Meanwhile, residents may change often, so a problem can pass from one tenant to the next. Short stays make the pattern harder to trace.

In purpose-built blocks, pipes and risers link flats from top to bottom. For example, a problem on the fourth floor may show up on the third or fifth. Residents sometimes blame each other, which gets in the way of a fix.

It helps to stay factual. Bed bugs are not a sign of poor cleaning. The NHS says bedbugs can be hard to find and may resist some insecticides. That is true in a clean flat as much as a cluttered one.

Why treating one flat in isolation can fail

Imagine a professional treats flat 3, but flat 4 next door is also home to bed bugs. Some insects in flat 4 may wander through the wall gaps into flat 3 after the treatment has finished. As a result, residents think the first treatment failed.

The movement study also noted that bed bugs spread through a building are harder to remove than those kept to a single bed or bedroom. Furthermore, it recommended checking units across the hallway from a known infestation, not only those above and below. That is a useful guide when you speak to neighbours.

This is why it pays to share information early. A building-wide check costs effort, but it can save repeated visits. Our guide to professional treatment in London explains what a thorough approach usually involves.

Who to talk to, and in what order

Start with your own flat. Do a careful check, take photos and keep a log. Our step-by-step post on how to check a London flat for bed bugs shows what to record.

Then tell the person responsible for the building in writing:

1. Landlord or letting agent, if you rent.
2. Managing agent or freeholder, if the problem may involve shared parts.
3. Neighbours, politely and without blame, once you have evidence.
4. Your council’s environmental health team, if nobody acts.

Shelter’s guidance on pests in rented homes advises tenants to notify the landlord in writing and keep photographic evidence. It also explains that councils can assess infestations under the Housing Health and Safety Rating System and can serve notices on landlords. Our renters and landlords guide sets out the same ideas in plain language.

Agreeing a joint plan

If several households are affected, ask the managing agent to coordinate. A shared plan should cover who inspects which flats and the same dates for access. It should also cover how long everyone monitors afterwards.

Ask for the plan in writing. Although agents may feel reluctant at first, a dated email makes it easier for everyone to follow up. Keep a record of who responded and when.

Practical points for neighbours to agree:

• Do not move furniture between flats while the issue is open.
• Bag and wash fabrics before they leave your home.
• Report new sightings quickly to the same contact.
• Share what you learn about entry points such as gaps and pipe holes.

Signs that the problem may be building-wide

One flat with a few sightings is a concern. Several flats with sightings is a pattern. Watch for these clues, because they tell you the building needs a shared response.

• A neighbour mentions bites, or you see furniture left out on the street.
• You find evidence in a room that shares a wall with next door.
• Sightings return soon after a treatment, even though you followed every instruction.
• Evidence appears in shared spaces, such as a laundry room or a stairwell.

None of these is proof by itself. Even so, each is a good reason to speak to your agent and your neighbours. Moreover, early action usually means fewer homes to deal with later.

Keeping the peace

Bed bug problems can strain relationships in a building. People feel embarrassed, and some fear being blamed. Therefore it helps to open with facts rather than accusations.

A short note to neighbours works well. Say that you found evidence, that you are following NHS advice, and that you would like to compare notes. Offer to share the dated photos, and ask whether they have seen anything similar.

Short lets and guest accommodation

Serviced flats and holiday lets add churn, because guests arrive and leave with luggage every few days. If you manage or stay in one, our guide on hotels and short lets covers the particular issues. Hosts and managing agents should follow the same written, evidence-led routine.

Local guidance

Council services differ across London, so check your own borough’s current page. Residents in central London can read the Westminster area guide. In the east, see bed bug guidance for Tower Hamlets and what Havering residents should know.

North London readers can use the Haringey area guide and the Brent area guide. In south west London, there is bed bug advice for Merton. Each page links to that borough’s own pest service where we could verify it.

Once you know where the problem sits, our post on heat and insecticide treatment explains the main options. Our post on how long treatment takes helps you plan for the weeks that follow.