The LWETB is seeking to add two extensions to the school, as well as a number of other changes.
A decision on the major refurbishment of a midlands school is due next week.
The LWETB is seeking permission from Westmeath County Council for significant changes to Castlepollard Community College.
The plans would see an existing extension to the main building demolished, as well as a number of pre-fab classrooms removed.
Those changes would make way for a refurbishment of the main building, and two, two - three storey extensions, which would include a host of new rooms.
They include general and specialist classrooms, a special education needs unit, a PE hall, and a library.
The planning file states the development will accommodate the school's need to cater for 350 students, an increase from the current figure of 264.
The proposals also include the removal of the existing play area, which would allow for the construction of two multi-use games areas.
Also included in the online proposal are plans to change the car park, which see the existing 58 spaces increased to 61, as well as 12 EV charging spaces.
The provision of 36 bike spaces, 28 of which are sheltered, is also included.
A new car set-down area is proposed off the Mullingar Road to the west of the existing sports pitch and a footpath will be provided for safe pedestrian access to the school.
Enhanced footpaths will also be provided along the western boundary of the site that will connect to the existing footpaths on Mullingar Road to provide connectivity to Castlepollard.
A decision from Westmeath County Council is due next Tuesday.