A small group of locals spent the morning colouring tiles with chalk into the colours of the rainbow.
Lord Mayor Lisa Scaffidi was a late contributor to the effort as well.
Perth resident Neil Buckley said the crossing aimed to highlight gay rights in the lead-up to equal marriage being debated in Federal Parliament.
Ms Scaffidi said she supported equal marriage rights.
‘Gay, straight, who cares? We are all humans and as long as we all respect each other it doesn’t matter what your sexuality is,’ she said.
DIY Rainbow Crossings have been chalked in Bassendean, Fremantle and Mt Lawley.