The former Holbeck Divisional Police headquarters on Burton Road in Beeston is being demolished to make way for an Aldi supermarket.
The demolition team expect to be onsite for another two weeks. Once the building has been flattened a crusher will be brought onto site to crush the rubble into hardcore, which will be used as a base for the new building.
The trees on site are subject to tree preservation orders and will not be felled.