Parents and residents have been asked to give their views on plans to extend Corby Old Village Primary School.
A consultation process has been carried out by the county council on proposals to increase the number of places at the school from 140 to 210.
The school is oversubscribed with 32 parents naming it as their first choice in the academic year 2012-13, with only 20 reception places available.
According to the county council, extending it would make it more robust in terms of finances and the curriculum.
There is room to expand the school, in High Street, and the headteacher and governors support the proposals.
If the scheme goes ahead the school would have new classrooms and an improved hall.
The consultation process ends tomorrow and the county council’s cabinet members will decide whether or not to proceed with the plans at a meeting on October 28.