Mr Wynyard said most council staff had been affected in some way, if they had not had to move they would have indirectly been affected by having to accommodate other staff.
Surveyors were part way through surveying the building to identify where the water was leaking into the building from and would be finished some time in March, he said.
Mr Wynyard said the survey was complex hence the longevity of the work.
After the survey had been completed, decisions would be made on what remedies or solutions would be put forward for the building with demolition not completely out of the picture, he said.
The Learning Centre, which had been affected by the first-floor closure, would be opened again this Friday.
Mr Wynyard said he had not heard any fresh reports of health issues brought on by the mould.
"The staff have been fantastic which has made the move a lot easier."