A £26m criminal justice centre in a Warwickshire town is expected to be completed in July.
Project manager Richard Little said work for the centre in Leamington Spa was slightly ahead of schedule.
The centre, on the site of the old magistrates' courts in Newbold Terrace, will house different groups such as Victim Support and probation staff.
Mr Little said the new building would allow "justice to be carried out more efficiently by the agencies".
He said the public would have access to all legal agencies more easily at the centre which would also include new and modern facilities for victims of crime and witnesses.
The UK's first Criminal Justice Centre (CJC) was opened in 2005 in Nuneaton.