Education secretary Michael Gove has said it is a pity a change of political leadership has deprived Fulham Boys School of a permanent site.
The Church of England free school was told on Monday (June 30) it will not be opening on its two-year temporary site in Gibbbs Green, West Kensington in September due to difficulties in securing a permanent site .
It means 84 boys now have to find new school places, just two weeks before the end of the school year.
The education secretary, who made the final decision, has blamed the Labour council which took over Hammersmith and Fulham when it won the local elections in May.
Labour immediately pledged to save Sulivan Primary School in Parsons Green which was to merge into New King's School's nearby site - leaving the Sulivan site free for Fulham Boys School (FBS) to be built.
Speaking exclusively to getwestlondon at Nishkam School in Isleworth, Hounslow this morning, Mr Gove said: "I have to respect the fact there was a change of political control.
"The previous Conservative council had identified a site for FBS and the new Labour council has said that site's no longer available, which means there's not a permanent home.
"I hope the council will work with us but I can't tell the council what to do. It's a pity the change of leadership and the Labour executive has deprived FBS of what was a viable site.
"I hoped the Labour council would have allowed the school to go ahead on that site. We have no alternative but to wait until we can find a permanent site. The council hasn't suggested any but we're trying hard to find one."
When asked by a little boy at Nishkam School this morning about what Mr Gove does, he replied: "It's my responsibility to make sure the teachers get the money they need to make sure you get the education you deserve."
Hammersmith and Fulham Council has said it disagrees with the decision and education boss, Sue Macmillan has sent a letter to the government asking what efforts have been made by them to secure a permanent site and why they reached the decision so late in the day.
She said the council supports free schools and is devastated the opening of FBS has been halted but is working with parents of boys in the borough to find new schools for them quickly .