The new £53 million Northamptonshire County Council headquarters has been opened by Communities and Local Government Secretary Sajid Javid.
Click below to watch a report by ITV News Anglia's Graham Stothard
The completion of One Angel Square has seen county council staff moved out of 12 buildings in Northampton, including County Hall, into one purpose-built office in the town centre.
It's expected the new building will save £51 million in running costs alone over the next 30 years with further savings associated with the sale of buildings and the end of leases.
One Angel Square has regenerated a formerly derelict site and will bring more than 2,000 staff closer to the town centre boosting the local economy.
Northamptonshire County Council says the total project cost £53 million and was delivered under-budget.
The new building has faced months of delays and there have been concerns among staff about the a hot-desk layout inside.