The Annex Toowoomba — Toowoomba City, QLD. The Annex is a restored Art Deco event facility behind Toowoomba City Hall at 541 Ruthven Street. Toowoomba Regional Council promotes its flexible function spaces, modern technology and historic interior for conferences, weddings and special events. The event team supports tailored room setups, catering and drinks, while the exact maximum and room configurations vary by event and are not published clearly in the council overview. Enquire directly with the council team for current capacities, event package and available AV. Check booking dates, approved event uses, latest prices and included items with the venue operator before paying.