The present hall at Yass High School is crowded with the current number of students reaching over 550.

Since the closure of Mount Carmel High School in 2014, Yass High School has been the only option for secondary education locally.

The restrictions on enrollments by the ACT Government on non-Canberra students have also led to an increase in the number of students at the school.

"A Project Reference Group has been formed and held its first meeting," a NSW Department of Education spokesperson said.

"An architect has been engaged and early design work has started.

"The project is on track and currently in the early planning stage and design stage."

The need for a new hall was recognised before the elections last year with a $9 million pledge made by political parties for the construction of the hall.

"The project budget is commercial in confidence until a competitive tender process has been completed and a construction contract awarded," a Department of Education spokesperson said.

"The Department of Education will work closely with the school to develop the plans for the new multi-purpose hall, and will share information with the school and local community as the project progresses."

Yass Valley councillor Jasmin Jones again highlighted the concern about the delivery of the promised hall in a timely fashion.

Cr Jones said that the Yass Valley population was predicted to reach 27,000 by 2036, which would include 7608 children.

"Our primary and high school student numbers in Yass are growing with Yass Valley experiencing high growth," Cr Jones said.

The growing need for the multi-purpose hall and sports centre at Yass High School has been felt by the community and students.

"A modern multipurpose facility is required if we want to host a basketball game, karate or martial arts event," she said.

"This was an election commitment.

"Involvement from our sporting groups, cultural groups, school council in the process is essential as their inputs will be valuable.

"The hall can also be an economic driver for the town filling up cafes and motels if we host a big event."

Yass High School P&C president Michelle Thornely also stressed the need for a new hall.

"The school is growing and the hall is getting overcrowded," she said.

Meanwhile, Member for Goulburn Wendy Tuckerman said the project was on track.

"It is currently in the early planning and design stages," Mrs Tuckerman said.

"A Project Reference Group has been formed and held its first meeting.

"Early design work of the new hall has also started," Mrs Tuckerman said.