A Costa Coffee branch owner has been served with an enforcement notice after opening without planning permission, a council has said.
The franchise, on Whiteladies Road in Bristol, requires permission for change of use from retail to a cafe.
Bristol City Council said the franchise holder, Stuart Montgomery, could apply for retrospective permission or appeal.
Mr Montgomery declined to comment. Costa Coffee said it was "aware of the situation".
"[The franchisee is] working with the local authority to regularise the position," said a statement from the cafe chain.
The council said Mr Montgomery could appeal against the enforcement notice or submit a retrospective planning application for the building, which was previously a newsagents.
Mr Montgomery also owns Costa franchises on Henleaze Road and in Portishead.