A 50-tonne excavator is being used to demolish the Tauranga City Council's old administration building this afternoon as the mechanical demolition stage of the project begins.
The concrete will be transported by truck to a concrete recycle facility and reused.
It was anticipated the first stage of the demolition will take at least four weeks, depending on the weather.
A number of safety measures and appropriate noise, traffic and pedestrian controls would remain in place to minimise the impact on traffic, pedestrians, businesses and services during this stage of the demolition.
A spokeswoman from the council said safety measures included fencing off the library carpark area and the large container wall on Willow St.