Bolton's historic town hall will be closed for 'precautionary' maintenance after an electrical fault was discovered.
A council spokesperson said the issue was not thought to be immediately dangerous but could be a safety concern if left unchecked.
Work will begin to repair the problem from this weekend, with public-facing areas - such as the One Stop Shop - targeted first in an effort to reopen them early next week.
The building, which was first opened in 1873, is Grade-II listed and had remained largely unchanged internally until a huge fire in 1981 prompted a refit.
Bolton council says many members of staff are currently working from home anyway so the timing of the repair works should keep disruption to a minimum.
A spokesperson for the local authority said: "We have identified a potential fault with some of the building’s fixtures, which if left unresolved could eventually become a safety risk.
"While there is no immediate safety risk, we are acting now both as a precautionary step and because current work-from-home guidance means disruption will be kept to a minimum.
"Over the last year, many office-based council staff have been able to deliver an excellent level of service for Bolton residents while working from home.
"We are confident this will continue while the maintenance work is carried out.
"Bolton Town Hall is quite rightly a source of great civic pride for our residents. We will continue to invest in its upkeep, and this is factored into council budgets.”
The council has not given an estimated date for completion of the work but says it aims to have areas open to have public areas reopened within a few days.
Exterior sections of the building have already been closed for some time for repair and regeneration work.
