The practice’s £65 million Faculty of Social Science building for the University of Sheffield will be knocked down and restarted after its foundations were found to be inadequate.
Construction started on the 17,000m2 scheme – which HLM said would ‘enhance the faculty’s reputation’ – in the summer of 2019.
But, with the steel and concrete frame complete, main contractor BAM Construction recorded worrying levels of subsidence.
Initially the firm planned to rebuild half the frame to solve the problem but it has now conceded that it will need to knock down the whole structure and restart on new foundations.
Demolition work will last throughout September and October, with completion of the building pushed back 18 months to December 2022.
It is being constructed on a former reservoir at the junction of Northumberland Road and Whitham Road in the South Yorkshire city. It is understood that a complex piling arrangement