Differences of opinion have led to a code of conduct complaint regarding the development matter and a public condemnation about agendas on the train corridor.

An application from Templar Tighes Hill to build 42 industrial units in the suburb went before Newcastle City Council on November 4 and was rejected by majority vote.

Neighbouring residents ran a vocal campaign against the plan.

Councillors Brad Luke, Bob Cook, Graham Boyd and Scott Sharpe will seek on Tuesday to have the decision overturned.

Cr Luke and colleague Aaron Buman have also lodged a code of conduct complaint against Cr Michael Osborne, who argued for the application's rejection on the grounds it did not comply with council planning guidelines.

Cr Luke said he believed that, under the council's code of conduct, Cr Osborne should have stated before the matter was determined that he had a friendship with one of the objectors and whether or not that represented a conflict of interest.

Cr Osborne said he did not have a conflict of interest.

He said he did not have a relationship with anyone with a private interest in the proposed development, nor an interest that would conflict with his public duty.

He said he had a friendship with a member of the public who was involved in public advocacy on the matter.

Cr Osborne (Greens) and Cr Luke (Liberal) are also at loggerheads over the council's approach to community debate on whether the State Government should cut the inner-city rail line.

Cr Luke unsuccessfully requested on Tuesday that the council state a position on the rail line as a matter of urgency.

Cr Osborne on Wednesday issued a media release labelling the move as "an outrageous abuse of process" because the matter was not urgent.