Kernrechtsfrage
Whether the sales chalet is a construction requiring a building permit.
Extrahierter Entscheid
Yes. Despite being mobile on wheels, it was installed permanently and durably on the site, affecting the parking area and thus qualifies as a construction/installations under planning law.
Extrahierte Begründung
A durably installed structure with fixed siting and non-negligible permanence may be a construction even if movable or easily dismantled; the decisive factor is its permanent presence and impact on the ground and surroundings.