Libraries, swimming pools, youth and community centres, town halls, parks and other open spaces were among more than 4,000 public assets sold by local councils to developers and other private buyers last year.
Sales appear to have risen since George Osborne, who was then the chancellor, changed the rules in 2016 to allow local authorities to use money from sales of publicly owned buildings and land to cover running costs.
Campaigners say that authorities facing financial pressures are denying future generations access to many community assets.
