What the Letter Usually Means
A block-wide notice tends to go out when bedbugs have been confirmed in one or more flats and whoever manages the building wants the neighbouring flats looked at or treated too. It does not mean your flat has them. It means you share walls, floors, service risers or a stairwell with a flat that does, and those are the routes bedbugs use to move between homes.
Read it for four things: the date and time of the visit, which rooms they need to get into, what they want you to do beforehand, and who to contact with questions. If any of those are missing, ask the sender in writing before the day rather than guessing.
Letting Them In When You Have Seen Nothing
It is tempting to decline because your bed looks clean. Please do not. A flat with a few bedbugs near the skirting often shows no bites at all for a while, and some people never react to bites in the first place — our guide on whether you can feel a bedbug bite explains why. A single untreated flat in the middle of a block can keep sending them back to the ones that were done.
If you cannot be in, arrange access through the contact on the letter. If you have a pet, a baby, or someone at home with a health condition, tell them before the visit so the plan for your flat can take it into account.

Getting Your Flat Ready
The letter should say which method is being used. Preparation differs:
- If it is a residual insecticide: strip the beds, hot-wash and bag the bedding, clear the floor around the bed and along the skirtings, and leave the furniture standing where it is so it can be treated behind. More on what that visit involves is on our chemical treatment page for Waltham Forest.
- If it is heat: anything that heat can damage has to come out of the room first — aerosols, candles, medication, vinyl records, plants and some electronics. Pets leave the flat for the day. See the heat treatment page for how that day runs.
- Either way: do not throw out a bed or mattress beforehand, and do not start moving furniture between rooms or down the stairs.
Whatever the company doing the work tells you on the day overrides general advice, including ours. Follow their instructions on when to go back into a treated room.
If You Already Have Signs, or Want Your Own Check
If you have spotting on the mattress, bites you cannot explain or have found a live insect, tell the building contact now rather than waiting for the visit. It changes what they need to do in your flat. Keep a sample in a sealed bag or a clear photo.
Some residents in Walthamstow blocks also want their own flat looked at independently, or want treatment arranged privately because the building visit is weeks away. We can do an inspection, from £120, and treatments start from £220, with the exact figure given on the phone by room count. Tell us about the block visit when you ring so the two do not work against each other.
For the wider picture of dealing with a landlord or neighbours across the borough, see the Waltham Forest page.
Bedbug Control Walthamstow — Questions
Do I have to pay for the block treatment?
That depends on your lease or tenancy and on who arranged the work. The letter or the sender should tell you; ask them in writing if it does not. We are pest controllers, not legal advisers.
The letter gives two dates. Why?
If a residual insecticide is being used, a second visit about 10 to 14 days later is normal, because it does not reliably kill eggs. Let them in both times.
Should I go and stay somewhere else until it is over?
Usually not. Leaving tends to carry bedbugs with you in bags and clothes, and an empty flat is not a reason for them to die off. Keep sleeping where you are.
I rent my Walthamstow flat. Should I tell my landlord about the letter?
Yes, in writing, even if the letter was addressed to you. They may need to arrange or agree access.
Can you treat my flat if the building is using another company?
We can talk it through when you ring. Tell us the method and dates on the letter so we do not undo each other’s work.
Elsewhere in Waltham Forest
The other areas in the borough, each written around a different situation.
Bedbug Advice for Walthamstow
Picked for this page: the guides that go further on what matters for Walthamstow.

How Professional Chemical Treatment Works
What is actually in a professional treatment, and why it is not the tin from the hardware shop.
Read more →
Preparing Your Home for Heat Treatment
What to do the week before, the night before and the morning of. A plan, not a list.
Read more →
What Happens After the Treatment
Day one to week six, what you will actually see, and when to stop worrying.
Read more →
Blinds and Window Frames
The window beside the bed: blinds, curtain tracks and frames, how to check and how they are treated.
Read more →Bedbug Treatments in Waltham Forest
Every service has its own page for Waltham Forest: heat, chemical, hotels, commercial premises and inspections.
Covering Walthamstow
Tell Us About the Property
Tell us what the letter says and whether you have seen anything yourself, and we will tell you what makes sense for your Walthamstow flat.