office building
From Longman Dictionary of Contemporary EnglishRelated topics: Buildings, Officesoffice buildingˈoffice ˌbuilding (also office block British English) noun [countable] TBBBBOa large building with many offices in it, especially ones that belong to different companiesExamples from the Corpusoffice building• The fireball destroyed a prefabricated office building before setting a four-storey office block ablaze.• And the office building was next to the storage tank.• In fact, I seem to remember it was a bloody great chunk of the office building took my head off.