Parents and residents descended on Harbour Primary School this week to find out more about plans to extend the school.
The scheme includes moving the infants from their site in Western Road to the site in Church Hill.
East Sussex County Council said it was not yet known what would be done with the infant school site once they had been relocated in September 2014.
The plans were unveiled at Harbour Primary School on Wednesday April 24 and include a two two-storey extensions and another two storey extension.
Head teacher Christine Terrey, the architect and East Sussex County Council’s school projects and reorganisation manager Sean Hambrook were at the exhibition to explain the plans.
However the scheme is already provoking some concerns from one neighbour.
Brenda Todd, of Church Hill, said she was concerned about the extra traffic the increased number of pupils would bring.
She pointed out roads around the school were already dangerous for children to walk along at the start and end of the school day due to traffic and bad parking by parents, who often parked across residents’ drives.
Ms Todd, who attended the exhibition, said: “I spoke to a representative of the county council and the architect and neither of them seemed to have any clue of the need for extra parking provision.
“I think they need to really think about this problem a lot more carefully as to how they can solve the parking problem.”
A planning application is due to be submitted to Lewes District Council for permission to go ahead with the proposals.
The council will have the final say on the scheme.