International and local artists transformed walls with 46 different pieces of work, ranging from people and animals to geometric patterns, as part of Public: Art in the city.
Mr Chamberlain said the initiative, spawned two years earlier, had delivered a better result than he first imagined.
‘It has added a bit more soul into the place,’ he said.
‘This is a part of the city changing from being a big country town to being a capital city.’
Mr Chamberlain said he hoped the initiative would return next year, with more investors seeing the benefits of art in Perth and Northbridge.