Mimi School principal John Elliot is fed up with his students' cramped learning space, including a toilet block.

A North Taranaki primary school is still waiting for a new classroom two years after it started teaching from a toilet block.

Mimi School, north of Urenui, has had its roll quadruple since 2006 and is now catering for over 60 students with three teachers, but only two classrooms.

School principal John Elliott says for nearly two years a third classroom has been housed in a combination school library and principal's office.

Meanwhile children are withdrawn to work with their teacher aide in a redundant special needs toilet block because there's no space left inside school buildings, he said.

"The whole thing has been a joke.

"We have been strung along for months with promises of classroom space, and numerous excuses for why the ministry can't provide it, but all have come to nothing."

Education Ministry regional property manager Lucy Ross says she is working with Mimi School to address the issue of its rising roll.

"A relocatable classroom will be installed at the school within the next month," she told the Taranaki Daily News.

Mr Elliott says he hasn't been told when the classroom would arrive.

"From the start of 2011 we've had an extra teacher and when you get another teacher you need a classroom to put them in but it's never happened.

"We stripped out the toilet block and have put the teacher aide and the library in there," he said.

The school has adopted an enrolment scheme to try to limit the school's growth but Mr Elliott says an influx of new families makes that difficult.

"We attribute the roll growth to ongoing development in the area and numerous subdivisions approved by the council," he said.

"We've also got third-generation farmers coming back and fourth- generation children coming to the school and you can't expect them to drive past the school and go somewhere else."

Mr Elliott says seeing new classrooms being approved and built at urban schools is frustrating when Mimi School continues to put up with unsatisfactory conditions.

"We could understand that the tough economic times call for restraint, but we would expect all schools to be working within those same constraints and this is simply not the case," he said.

"It's hard to swallow when we are seeing urban schools being approved new buildings, or huge upgrades when they are nowhere near the cramped conditions that we are having to endure.

"I am prepared to wager that none of the schools in New Plymouth and Waitara that are currently in the process of having new classrooms approved are having to use a toilet block for learning," Mr Elliott said.