Rich Lister Judith Neilson's $32 million Phoenix Central Park performance space and gallery in Sydney, a project that blurred the line between private and public space, won the country's top awards for commercial and interior architecture.

Philanthropist Ms Neilson's building, which incorporates two distinct wings designed by two different architects – John Wardle Architects and Durbach Block Jaggers – replicated at national level the gongs it took out earlier in the year at NSW state level for top commercial and interior architecture.