Rich Lister and legendary adman John ‘Singo’ Singleton has decided to part ways with the secluded Paddington office complex he has owned for 50 years after appointing agents to sell the The Bonython.

Price expectations are around $28 million for the three-level, four-building complex surrounding an inner courtyard. Mr Singleton bought it with fellow advertising guru Duncan McAllan for $300,000 in 1976 from art dealer Kym Bonython.