Grey papery shell, in-and-out traffic
A pale grey papery globe under the eaves, in a loft or shed, or — more often — invisible behind a single hole in the soffit with wasps shuttling in and out every few seconds.
A steady, single-file stream of wasps in and out of one point on the building is a nest — and that's the only access you need to identify.
Confidence rule — Five or more wasps a day inside the house through July or August almost always means a nest in the structure.
A pale grey papery globe under the eaves, in a loft or shed, or — more often — invisible behind a single hole in the soffit with wasps shuttling in and out every few seconds.
A faint humming or rustling inside a wall void or ceiling that gets louder when the sun heats that elevation — usually meaning the nest is directly behind that surface.
Wasp nests are essentially odourless. A sweet rotting smell in the same area is more likely to be trapped honeybee comb (different problem, different treatment).
Brown sticky staining on a ceiling below a loft nest, and the occasional 'dropout' wasp falling through a light fitting or extractor as the nest matures.
Loft eaves, soffit voids, cavity walls accessed via air-bricks, garden sheds, compost heaps — anywhere undisturbed with a small, defensible entry hole.
Time of activity is one of the fastest ways to confirm a species — daytime loft noise rules out rats, midnight kitchen scuttling rules out squirrels.
Anyone in the home is allergic, or the nest is near a door, child's bedroom or footpath.
Identification, biology, treatment, prevention — the full UK reference.
What it costs, what drives the price, and how London compares to the rest of the UK.
Vetted UK specialists matched to your postcode for same-day callout.