More than 8m sq ft of new office space is under development in the City of London.
A further 15m sq ft of office space has planning consent. Atisreal says vacancy rates are set to go beyond 10% by 2020. Between 80% and 90% of the current volume of City floor space under construction remains unlet, according to some estimates.
The extend of development has raised fears of a repeat of the late 1980s when overbuilding led to swathes of empty blocks in the Square mile and Canary Wharf. But pundits seem to agree the outlook is not as bleak as it was in the early 1990s.
The Financial Times includes a table of the seven biggest speculative schemes in the City sourced from Drivers Jonas.