The green space charity Groundwork Leeds has been chosen as the landscape architect and contract administrator for the Bond Court project in Leeds.
The joint scheme with Leeds City Council and landlord Midland House will involve six new trees, granite repaving and improved seating. The existing petanque pitch will be retained and new giant chess boards incorporated into the new seating area.
Cllr Richard Lewis, Leeds City Council executive board member for development and the economy said: "This is a good example of improving the public realm for our residents and visitors.
"The square is one of the city centre’s promotional and event spaces and the work that is being carried out will provide a fantastic new space for this part of the city and breathe new life into it."
Midland House owns an office building on the square in which it has recently opened retail units fronting the square, using property developers Wilton Developments.
Wilton managing director Jason Stowe said: "As a forward thinking investor, Midland House see the advantage of investing private monies in to publicly owned space for the benefit of all."
Work is due to start next month.