Major changes to education spending and services in Cornwall are vital if primaries are to provide IT, sport, arts, library and play areas, officials have said.
The council has called for new ideas if the area's small schools are to be sustainable and children are to have access to facilities.
Officals said they can't rely on Government funding, due to a predicted investment downturn and a #163;25 million backlog. Twenty primaries lack a hall and there are 104 temporary classroom buildings.
Three primaries have been given cash under the Primary Capital renovation scheme, but the high number of surplus places could hinder the council being given more.
Some funding from the council help small schools has stopped, making it harder for heads to cope, said Mike Peters, an area head of service. km.