Wasp Nest on the Balcony — What to Do
By Wespenprofis.ch · Reviewed by:Fachbewilligung Schädlingsbekämpfung VFB-S · Updated: 3 July 2026
At a glance
A wasp nest on a balcony often sits directly above the seating area or under the ceiling of the balcony above — right in the middle of the space you use every day. Stay off the balcony, keep windows near the nest closed and have the nest removed by a licensed professional.
Why this is tricky
A wasp nest on the balcony is particularly unpleasant because it sits right in the middle of your everyday living space — often under the balcony ceiling, in a recess around a light, behind furniture or in the roller shutter box. Unlike a nest on the roof or in the garden, there is barely any way to give it a wide berth here: anyone stepping onto the balcony to air the flat, hang up washing or simply sit down inevitably comes close to the colony. Vibrations from footsteps, open windows or balcony doors, and even a parasol being opened can be perceived as a disturbance. In late summer, when the colony reaches its greatest strength and reacts most aggressively, this proximity becomes a real risk — especially for children and pets, who often spend time on the balcony.
What you should do straight away
- Stop using the balcony until the nest has been removed professionally.
- Keep windows and the balcony door near the nest closed.
- Do not seal the entrance hole or treat it with spray.
- Consistently keep children and pets away from the balcony.
- Call in a professional (/wespennest-entfernen) to remove the nest safely.
Good to know
On a balcony, small nests under 5 cm can sometimes be vacuumed out with little risk once a professional has assessed the situation — for larger or less accessible nests, cold treatment or a targeted biocide application is used. Once removed, an old nest is never recolonised, so the balcony can be used normally again afterwards. If the nest sits closer to the roof edge above the balcony, it is worth taking a look at our guide Wespennest Dachvorsprung. For general advice on how to proceed when you find a nest, see Wespennest gefunden — was tun.
Frequently asked questions
Can I still use the balcony while the nest is there?
We advise against it. Even ordinary movement and noise on the balcony can be perceived as a disturbance by the colony and lead to defensive stings. Avoid the area until the nest has been removed professionally.
Why do wasps build on balconies of all places?
Balcony ceilings, lights, roller shutter boxes or recesses behind furniture offer shelter from the weather and make an attractive, quiet nesting site close to the building for the queen in spring.
Is it enough to move furniture or plants off the balcony?
No. The nest remains and the colony continues to defend its location. Only professional removal solves the problem for good.