Work is due to start at the former district council headquarters in Alnwick tomorrow ahead of its sale by Northumberland County Council.
The Gazette understands that Allerburn House, off Denwick Lane, has been sold 'subject to contract' and early works to trees in the grounds are to take place ahead of further development.
It is thought the work will include some trees being removed and general woodland management and is expected to last around a fortnight, generating a level of noise that has required neighbouring residents being informed. However, not all households in Allerburn Lea have been informed.
County councillor Gordon Castle has been assured 'the work will be completed sensitively' and 'the majority of the mature trees around the boundary are being kept and discussions are ongoing around options for the memorial tree and the town twinning tree within the grounds'.
Although it is a private site, it is used by dog walkers and for health and safety reasons, the grounds will be closed as tree-cutting equipment and vehicles will be on site.
Nearby residents have been asked to contact the council if they have any concerns.
The landmark building was deemed as surplus to requirement by Northumberland County Council, which took over ownership of both assets following the demise of Alnwick District Council.
Coun Castle added: "I cannot disclose the nature of the contract yet, which is a matter of commercial confidentiality at this stage.
"There is no planning application submitted yet, though obviously there will have been pre-application discussions.
"Perhaps I should add that tree specialists and professionals will be present to ensure that the work carried out retains the finest specimens and removes only what has to go."