The company had appointed local contractors Waldron Construction to oversee the demolition.
The company expected to announce details about its new site at Marsden Point within a few weeks. It would ease buildings from a developer.
It hoped to secure its new Whangārei site by May.
Mr Adams said demand for Ballance's product was seasonal, peaking in autumn and spring, and the company was managing the project carefully to ensure there was no disruption to supply, particularly over peak periods.
The new two-site strategy would boost customer service and accessibility, as well as product quality and reliability of supply.
It would use its yet-to-be-built Whangārei site for product bagging and distribution to customers with good access to Whangārei. Marsden Point would be the central distribution hub for the region, a bulk storage and transitional facility for product arriving from Northport, and a customer service centre.