That is set to change with an announcement on Friday by Bathurst MP Paul Toole that the school is to be upgraded and extended as part of a NSW government's $6 billion school building program.

The school has eight demountable classrooms and only four permanent ones, a situation that causes considerable problems for both staff and students.

"When it's wet, cold and snowing there is no covered access and the children have to travel quite a long way in those conditions to get into class," Ms Jackett said.

Although planning is in the early stages, Ms Jackett said that it was almost a complete rebuild of the school.

"In preliminary discussions we've been looking at 10 new classrooms, new toilet facilities, admin and staff facilities and also looking at improving traffic concerns around the school," she said.

Ms Jackett said that the school's size has almost tripled in 14 years.

"We only had 120 students back then and now we're just over 300, and the growth has been steady and constant over that time," she said.

Not only has the school been left without permanent classrooms as it's grown, the staff have been sacrificing some creature comforts.

"We've also seen a tripling of staff numbers as well," Ms Jackett said.

"We have 35 staff here and only one toilet, so when they have a 10-minute break they all want to get to that bathroom."