30-31 Haymarket SW1Y Timeline News and progress updates from 30-31 Haymarket new development in SW1Y Post a new milestone A new planning application has been submitted for the demolition of roof and erection of an additional storey at 30-31 Haymarket. The extension will comprise new... 01/11/2020 by Buildington 30 Haymarket - new on Buildington! 02/02/2014 by Buildington