Parents and residents are furious with government plans to redevelop a Sydney school in a high fire danger zone.

The redevelopment of Manly Vale Public School on Sydney's northern beaches has been with the state's joint regional planning panel since January, after the former Warringah Council urged the Department of Education to withdraw its application for the $23 million redevelopment over environmental concerns.

The school's fire safety evacuation plan shows that it would take up to 15 minutes for 18 buses to rescue hundreds of students from the school located on top of a ridge next to a category one fire zone, according to documents submitted to the council.

NSW Premier Mike Baird, who is the local MP, said: "We have been working closely with authorities regarding bushfire safety at the school and are satisfied the current plans will provide appropriate protection."