As Switzerland's most populous canton, Zurich is also its most active in architecture and planning competitions. Cities like Zurich, Winterthur, Uster and Dübendorf regularly issue new competitions — from schools and sports facilities to urban quarter planning. The City of Zurich's Building Department (AHB) is a national benchmark for high-quality procurement.
Most procedures run as open project competitions under SIA Ordinance 142. School buildings account for around 30% of all competitions, followed by public buildings, open space design and housing developments.