New reception places for Bishop Road School, Bristol
Thirty new reception places are to be created at Bishop Road Primary School in north Bristol.
The city council said the site of a former scout hut and land next to playing fields on Beauchamp Road would be used for the school's expansion.
A spokeswoman for the Liberal Democrat-controlled authority said providing school places close to where people live remains a priority.
The 1,400 square metre site was bought by the council for £300,000.
In a letter sent to parents and guardians, head teacher Gillian Powe and chair of governors Mark Worsley, said the move to a four-form school would be gradual with pupil numbers rising by one class a year until 2018.
Bishop Road Primary in Bishopston currently has more than 700 pupils aged from three to 11.
Last week the authority announced an additional 300 places would be created at St John's Primary on Lower Redland Road after the council bought a building belonging to Avon and Somerset Police.