The building, funded by the federal government's Building Education Revolution program, was launched by the Federal Member for Ballarat, Catherine King, on December 6.

School principal Philip Parkinson said art, music and performing arts had been a key focus for the school over the past few years.

"Now we've got a space for that purpose and a designated space for performances," Mr Parkinson said.

"We use it for auditions and rehearsals and as an art room. It means we can run a lot of programs that we couldn't run before."

He said the funding had given the town a first-class educational building facility that would serve the school well into the foreseeable future.

Catherine King said the school had been a place of education for the youngsters of Trentham for more than 135 years.

"It (building) will ensure this location continues as a place of education for many years to come," she said. This facility is also very much in keeping with activities within the community of Trentham.

"In recent times the Trentham Neighbourhood Centre has been upgraded and there are many other commercial and community initiatives underway, ensuring Trentham has a vibrant future."