Six alternative designs for the new building code named Project Angel were put on display to the public this morning.
They show what an office block designed to house 2,000 county council workers could look like when it is built on a council car park in Angel Street, at the back of the current County Hall building.
The new building will replace 12 existing county council buildings spread across Northampton and it is claimed will save up to £54 million in the future running costs.
The council hopes to sign up a builder by August next year in time to start work at the beginning of 2015.