Yashar Shokrgozar is "very proud" of the work he did on the famous staircase belonging to Sydney's most controversial deputy mayor.

But months later, Mr Shokrgozar's marble supply company is still seeking payment for it.

Auburn's Salim Mehajer is being sued by Mr Shokrgozar for thousands allegedly still owed for a lavish onyx staircase installed in his Lidcombe home.

The home's opulent centrepiece, which has appeared in a music video and magazine shoot, on Wednesday featured in the much more austere setting of a Newtown courtroom, where Cr Mehajer's representative failed to reach an agreement with Mr Shokrgozar.