Kogarah Courthouse will take on a new role after confirmation local court sittings will end in the middle of next year.
A Department of Justice spokesman said the courthouse and registry would remain open.
"Regular sittings of the state's new super tribunal, the NSW Civil and Administrative Tribunal, will be held at the courthouse from December 1," he said.
This body was established to consolidate the work of 22 former NSW tribunals. It deals with a range of matters, including consumer complaints, tenancy disputes and guardianship applications for people who are unable to make decisions because of a disability.
"The new tribunal provides communities with access to quick and affordable justice," the spokesman said. "Local court workloads have been falling steadily across the state since 2008-09, which is an encouraging sign the state government's law and order strategies are working.
"The chief magistrate determines sittings of the local court and is proposing to suspend sittings at Kogarah from July 2015.
"Kogarah Courthouse [at present] sits three days a week and its workload will be transferred to other surrounding courts.
"The court registry continues to operate five days a week from 9am to 4pm. Court users will be able to access nearby local courts including Newtown, Burwood and Sutherland."
St George-Sutherland Law Society president Peter Fowler criticised the closure when it was first mooted last year.
"This will result in inconvenience and delays to the people in the St George area, with likely delays flowing onto the Sutherland and Downing Centre courts," he said.
"The local courts are the coalface of our judicial system and speedy access to justice is vital to all users of the court system, both in the criminal and civil jurisdictions."
Opposition denounces closure
The state government has "turned its back" on the St George community with the decision to close the Kogarah Local Court, the Opposition spokesman on justice Paul Lynch said.
Mt Lynch said NSW Attorney General Brad Hazzard had few answers when quizzed about the move at a budget estimates committee hearing.
"What's particularly unacceptable is that the Attorney General keeps blaming the chief magistrate for this problem." Mr Lynch said.
"The truth is that the number of courts depends on the amount of government funding."
"If the government won't fund them the courts can't stay open."
Labor candidate for Kogarah Chris Minns said he was particularly concerned about the implications for victims of personal and domestic violence.
Do you think Kogarah Local Court should close?