What the Communal Parts Change
A house has its own walls on every side. A flat in a Finchley block has neighbours above, below and across the landing, and a stairwell that every resident walks through with their bags, their shopping and, now and then, a secondhand sofa on its way up.
Bedbugs do not live in stairwells by choice. They live where people sleep. But a stairwell is how a chair left out for collection, or a mattress dragged down three flights, passes them from one door to the next. In older mansion blocks, gaps around pipes, floorboards and shared service risers can do the same quietly between flats that sit on top of each other.

Treating One Flat Without Ignoring the Rest
We treat the flat that has them. In a Finchley block, as in most, flats are usually treated one at a time, because each flat has its own tenancy or lease and its own bill. What matters is that the treatment allows for the edges your flat shares with the building.
- Chemical leaves a residual along skirtings, door frames and the gaps where pipes come through, so anything arriving from next door meets it. It runs to two or three visits. The chemical treatment page for Barnet covers how that course works in a block.
- Heat clears every stage in the flat in one day, eggs included. Because it leaves nothing behind, we often add a light residual at the party walls and the front door when neighbours are close. See heat treatment in Barnet.
- Either way, the front door and its frame get attention, because that is where the flat meets the landing.
Telling the Neighbours and the Managing Agent
It is an awkward conversation, but it helps. If the flat next door or the one below has them and nobody treats it, yours can pick them up again after we have finished. A short note to the managing agent or the residents' association, in writing, is usually the right first step: it lets them decide whether other flats should be looked at.
If a neighbour wants to know whether their own flat is affected before paying for treatment, an inspection settles it. Who pays for anything beyond your own flat depends on the lease or tenancy; we can describe what we find, but we are pest controllers, not legal advisers.
Keeping the Stairwell Out of It
While you wait for treatment, the aim is to stop anything carrying them out of your door. Bag bedding before it leaves the bedroom and take it straight to the washer. Do not put furniture out on the landing or down by the bins; if something has to go, ask us first and wrap it well. Keep the flat door closed rather than propped open.
When you ring about a flat in Finchley, tell us which floor you are on, whether the block has a managing agent and whether anyone nearby has mentioned bites. The Barnet page has more on organising treatment in a busy household.
Bedbug Control Finchley — Questions
Do you treat the stairwell or communal hallway?
Not as a rule. Communal areas belong to the freeholder or managing agent, so any work there is arranged with them. We concentrate on the flat and the edges it shares with the building.
My neighbour has bedbugs. Should I get my flat treated now?
Not until you know you have them. Look along your mattress seams and bed frame, or book an inspection, rather than paying for a treatment you may not need.
Can you treat two flats in the same block together?
Often, yes, if both residents want it and access works. Each flat is quoted on its own rooms, and treatments start from £220.
Is heat treatment possible in an upstairs flat with no lift?
Usually. The kit is carried up by hand. Tell us about the stairs when you ring so we can plan the visit.
Elsewhere in Barnet
The other areas in the borough, each written around a different situation.
Bedbug Advice for Finchley
Picked for this page: the guides that go further on what matters for Finchley.

Why Bedbugs Reappear After Treatment
Hatching, survival or re-introduction. Three different problems that look identical.
Read more →
Can Bedbugs Survive a Heat Treatment?
Sometimes, yes. Here are the five ways it happens, and how each one is avoided.
Read more →
Bedbugs in Curtains and Soft Furnishings
Curtains, cushions, throws and chairs: what goes in the wash, what is treated, what comes down.
Read more →
The Places That Get Missed
Beyond the bed and the two-metre radius: the harbourages that survive a mediocre inspection.
Read more →Bedbug Treatments in Barnet
Every service has its own page for Barnet: heat, chemical, hotels, commercial premises and inspections.
Covering Finchley
Tell Us About the Property
Tell us which floor you are on and whether any neighbours have mentioned bites, and we will explain the options.