Bees on Commercial Premises: Relocation, Not Treatment
The short answer
- Identify before you act. Honey bees are relocated wherever it is practical. Wasps and hornets are treated. Bumblebees and solitary bees are usually left alone to finish the season.
- A very high proportion of calls reporting bees on commercial premises turn out to be wasps. The response is completely different, so identification is the first job, not a formality.
- A honey bee swarm resting on a wall or a tree is a temporary event and often moves on within a day or two. A colony established inside a cavity is a different, longer job.
- Bee relocation and removal is a named Instant Pest Solutions service, alongside wasp and hornet nest removal, so you get an honest answer about which one you actually need.
A call about bees on a commercial site is usually a call about one of four completely different insects, with four different correct responses. Getting that identification right is the difference between relocating a valuable honey bee colony and treating a defensive wasp nest above a fire exit, and between an appropriate intervention and a wholly unnecessary one.
This guide is written for site managers, facilities managers, hospitality operators and housing providers who have insect activity they think is bees. It sets out how to tell them apart, what happens in each case, why honey bees are relocated rather than treated where practical, and where the genuine safety line sits. Instant Pest Solutions provides insect treatment and management including bee relocation and removal across the North West.
Is it actually bees?
Often not. The single most useful thing a site team can do before calling anyone is take a photograph from a safe distance and note where the insects are entering. Those two pieces of information usually settle the identification, and they change what happens next entirely.
| Insect | What it looks like and does | Correct response |
|---|---|---|
| Honey bee | Golden brown, slim, hairy. Steady two-way traffic at one small entry point. Sometimes a large hanging cluster during swarming | Relocation wherever practical, working with a beekeeper. Treatment only where relocation is genuinely impossible and there is a real risk |
| Bumblebee | Large, round, very hairy, often loud. Small colony, low traffic, frequently in a compost heap, bird box, cavity or under decking | Normally left alone. The colony dies out naturally at the end of the season and does not reuse the site |
| Solitary bee | Small, often metallic or dark. Many individual holes in soft mortar or a bank, no shared nest | Left alone. Not a colony, not defensive, and the mortar issue is a pointing question rather than a pest one |
| Wasp | Bright yellow and black, smooth, narrow waist. Grey papery nest, aggressive near the nest late in season | Treatment and nest removal, particularly where the nest is near people or food |
| Hornet | Larger than a wasp, more brown and orange. Similar papery nest, usually in a void or tree cavity | Treatment where it presents a risk. Correct identification matters given ongoing interest in non-native hornet species |
| Masonry bee | Solitary bee nesting in soft mortar joints | Left alone. Repointing after the season is the sensible response rather than treatment |
Steady one-point traffic points to honey bees. A grey papery nest points to wasps.
The behavioural tell that matters most is traffic pattern. Honey bees produce a constant, purposeful two-way stream at a single small entrance, and it looks organised. Wasps come and go less predictably and become noticeably more defensive as the season progresses. Our guidance on commercial wasp control covers the wasp case in full, and it is worth reading if the identification points that way.
Why are honey bees relocated rather than treated?
Because a honey bee colony is a managed agricultural asset with real value, a pollinator with a genuine role in the wider environment, and in most situations it can be moved rather than destroyed. Treating a honey bee colony that could have been relocated is a waste, and on a site with any public-facing sustainability commitment it is also a reputational misstep that is easily avoided.
There is a practical argument as well. Treating a colony inside a wall or roof void kills the bees and leaves the comb, the honey and the brood in place. That residue then ferments, attracts secondary pests, and honey can seep through plaster and staining onto internal finishes. On a food site the residue is a further problem in its own right. Relocation, where practical, avoids all of it.
The part people are not told about treated colonies
Honest limits apply. Relocation needs safe access to the colony, a practical route to lift the comb, and a beekeeper willing and able to take it. A swarm on a low branch is straightforward. An established colony forty feet up inside a cavity wall on a live hospital or food production building may not be relocatable at all, and in that case the decision has to be made on risk with the reasoning recorded.
What is the difference between a swarm and an established colony?
Time and location. A swarm is a colony in transit, usually a large cluster hanging on a branch, wall, fence post or sign while scout bees look for a permanent home. It has no comb, no brood and nothing stored, and it very often moves on by itself within a day or two.
That matters commercially because a swarm on a customer-facing area looks alarming and frequently needs nothing more than a cordon and a little patience. A swarm is also at its least defensive at this stage, having no nest to protect. The correct response is usually to keep people back, avoid disturbing it, and get it collected or let it move.
An established colony is a different proposition. It is inside a cavity, has built comb, is raising brood and storing honey, and it is not going anywhere. Established colonies in commercial buildings are typically found in wall cavities, soffit and eaves voids, chimney stacks, flat roof voids and occasionally inside disused plant. Getting one out is a building access job as much as a bee job, which is why it needs surveying rather than quoting over the phone.
What should the site team do, and not do?
Keep people away, gather information, and resist the urge to intervene. Almost all of the harm done in the first hour of a bee incident on a commercial site is done by well-meaning improvisation.
Immediate steps on a commercial site
- Cordon the area and keep staff, customers and contractors at a sensible distance from the entry point or cluster.
- Photograph the insects and the entry point from a safe distance, because that is what settles the identification.
- Note whether traffic is a steady stream at one point or scattered, and whether you can see a grey papery nest.
- Check whether anyone nearby has a known sting allergy and make sure supervisors know.
- Close windows and any air intake near the activity, and divert pedestrian routes rather than trying to move the insects.
- Do not spray anything, block the entrance or attempt to smoke them out. Blocking an entrance drives an established colony further into the building.
- Do not hose a cluster or disturb it to make it move, which turns a calm swarm into a defensive one.
- Log the date, location and observation in the site pest file, because it is relevant if activity recurs at the same void next season.
The point about blocking an entrance deserves emphasis. Sealing the outside entry of an established colony in a cavity does not remove the colony, it makes the bees look for another way out, and on an occupied building that route is often into an interior space.
Where does the safety and legal position sit?
Bees are not protected in law in the way that some wildlife is, but the professional and practical constraints are real and there is a clear duty of care to the people on your site.
The immediate safety issue is sting allergy. For most people a sting is painful and unremarkable, but for anyone with a known allergy it can be a medical emergency, which is why an active colony next to a doorway, a fire exit or an outdoor eating area is a risk that has to be assessed rather than tolerated. That assessment sits within your own obligations, and HSE guidance on risk assessment applies to it as it would to any other site hazard.
The professional constraint is competence and product use. Any treatment applied to a wasp, hornet or non-relocatable bee colony sits under COSHH with a product-specific assessment, and where it is at height or in a confined void the method statement has to reflect that. The British Pest Control Association is the standard we work to, and our guidance on COSHH, RAMS and the ERA explains the documentation set that should accompany any treatment on your site.
On a food site there is an additional consideration. Any insect activity in or near open product, and any treatment applied in a production environment, is a matter for your pest management records and potentially for your next audit, so the decision and the reasoning both need writing down. Our commercial pest control hub covers how that record is prepared.
How does the work actually run?
Survey, identify, decide, act, and where a structure is involved, reinstate. The decision point in the middle is the part that distinguishes a good contractor from a spray-first one.
The sequence on a commercial site
1 Identify the species properly
On site or from clear photographs. This determines everything that follows, and it is the step most often skipped when someone assumes bees and treats wasps, or the reverse.
2 Assess the risk and the location
How close is the activity to people, food, fire exits and air intakes. A colony in a remote boundary wall and the same colony above a serving hatch are not the same job.
3 Decide relocate, treat or leave
Honey bees relocated where practical. Bumblebees and solitary bees normally left to finish the season. Wasps and hornets treated where they present a risk. The reasoning recorded either way.
4 Relocate with a beekeeper where practical
Access arranged, the colony and comb lifted where the structure allows, and the bees rehomed. Swarms are usually straightforward. Cavity colonies depend entirely on access.
5 Treat and clear where relocation is not possible
Treatment under COSHH assessment, followed by comb and honey removal and cleaning, because leaving comb inside a cavity creates the secondary problem.
6 Proof the void and document
The entry point closed once the colony is out, because a void that has held a colony is attractive to the next swarm. Findings, decision and method recorded for the site file.
That final proofing step is the one that stops the problem repeating. Bees locate cavities partly by residual scent, so a soffit void or chimney that has held a colony is a preferred site for a future swarm unless the entry is closed properly.
Frequently asked questions
How do we tell bees from wasps before we call anyone?
Look at the traffic and look for a nest. Honey bees produce a steady, purposeful two-way stream at a single small entrance and are golden brown and hairy. Wasps are bright yellow and black, smooth, with a narrow waist, and build a visible grey papery nest. A photograph from a safe distance plus a note of the entry point is usually enough for us to confirm.
Will you relocate a honey bee colony rather than treat it?
Wherever it is practical, yes, working with a beekeeper. Relocation needs safe access, a workable route to lift the comb and a beekeeper able to take the colony. Swarms are usually straightforward. An established colony deep inside a cavity at height may not be relocatable, and in that case the decision is made on risk and the reasoning is recorded.
Should we block the hole the bees are using?
No. Blocking the entrance of an established colony does not remove it, and the bees will look for an alternative route, which on an occupied building is frequently into an interior space. It also traps brood and stored honey inside the void, which creates the fermentation and staining problem later. Leave the entry open until the colony has been dealt with.
We have bumblebees in a cavity by a doorway. Do they need treating?
Usually not. Bumblebee colonies are small, comparatively docile, and die out naturally at the end of the season without reusing the site. Where the nest sits directly on a busy route or beside an outdoor eating area, the practical answer is normally to divert people around it for the remainder of the season rather than to treat.
What happens to the honeycomb if a colony has to be treated?
It has to come out, and that should be part of the job rather than an afterthought. Comb, brood and stored honey left in a cavity ferment, attract secondary insects and can seep through internal finishes and stain plaster. Where a colony inside a structure is treated, plan on comb removal, cleaning and then proofing the entry point.
Is bee and wasp work available across your whole coverage area?
Insect treatment and management, including bee relocation and removal and wasp and hornet nest removal, is delivered directly across Liverpool, Manchester, Cheshire, Merseyside, Lancashire, Yorkshire and the greater North West. For multi-site operators with premises beyond that area, coverage is arranged through our FM partner network with escalation through us.
Getting the identification right first
Almost every bad outcome in this area starts with the wrong identification, and almost every good one starts with a photograph and a phone call before anybody sprays anything. If you have insect activity you think is bees, tell us what you can see and we will tell you honestly whether it needs relocating, treating or simply leaving alone.
Call Instant Pest Solutions on 0151 345 0556, or contact us for more info to arrange a site walk-around survey.