A 'damning' report by the Joseph Rowntree Foundation published today will put private funding for housing associations under threat, the paper predicts.
The report 'Housing association space standards decline' compares accommodation with the high rise housing failures of the 1960s and 1970s.
'A growing number of houses are being built with little scope for future adaption or enlargement,' said the report's co-author, Professor Valerie Karn.
The paper quotes several City investors in housing associations.
A Halifax Building Society spokesman called for a 'clear government policy on social housing that would provide a firmer basis for the housing association sector to raise money from institutions.'