Work to remodel St Mary's Primary School in Jersey will start in January.
The project is set to cost £6.5m and includes a new nursery, a new hall roof and larger classrooms.
Historic parts of the building will be kept, with the oldest block dating back to 1901.
Building work will be completed in four phases over the next two years.
Parents, parishioners and members of the public who would like to view the plans can do so at open afternoons taking place at the school on Thursday 13 December between 2:15pm and 3:30pm and on Friday 14 December between 11:30am and 1:30pm.