I have the building residents' meeting.
'Condominio' — con-do-MI-nio. Stress on the third syllable. 'Riunione' — riu-nio-NE, stress on the last syllable.
Use among adults who live in apartment buildings (the majority of Italian urban dwellers). The 'riunione di condominio' is a compulsory, often dreaded social obligation.
A 'condominio' is an apartment building with shared governance. 'Riunioni di condominio' (residents' meetings) are compulsory for major decisions about the building. They are famous in Italian culture for being long, contentious, and unavoidable.
Ho l'assemblea condominiale.
I have the residents' assembly.
More formal term — used in official contexts but understood by all
Devo parlare con l'amministratore.
I need to speak with the building manager.
'Amministratore di condominio' is a legally required role in Italian buildings
I vicini fanno di nuovo casino.
The neighbours are making trouble again.
Informal — suggests a conflict that requires your attention
Italian 'riunioni di condominio' are cultural institutions — famous for arguments about heating bills, parking spaces, and entrance renovations. They feature in Italian comedy and are a universal shared experience for apartment dwellers.