Four fire engines have been sent to a fire at the old planning offices at South Hill.
A total of 18 firefighters are on the scene in St Helier this afternoon (3 January).
An Incident Command Vehicle and Fire Duty Manager have also been dispatched.
The fire is said to be on the first floor of the former offices.
Footage posted online shows smoke coming from the building.
People are being asked to avoid South Hill, as the road is closed at both ends.
'No final decision' on planned Apple Crusher relocation
Jersey's Infrastructure Minister says he's listening to concerns expressed over plans to remove the Apple Crusher on King Street... and insists no final decision has been made.
DFDS Christmas timetable signed off... but still not published
DFDS' Christmas and New Year timetable still isn't published, despite Jersey's Economic Development Minister telling Channel 103 his department signed it off a couple of weeks ago.
Opening of 'transformed' Departure Lounge weeks away
The first part of the transformed Departure Lounge at Jersey Airport is expected to open in mid-November.
Should the King Street apple crusher be relocated?
Hundreds of people are having their say on a suggestion the apple crusher outside M&S could be moved,
Jersey Bulls restore away match livestream
Jersey Bulls have reinstated their livestream to their away game against Bedfont Sports following an outcry from fans.
Jersey population stable but ageing as migration falls
Jersey's estimated population was unchanged at the end of last year at 104,500 people.
Ministers meet to discuss Channel Islands connectivity
Jersey and Guernsey could work together to encourage cruise operators to include both the major Channel Islands in their itineraries.
Jersey cricket star off to Canada
A young Jersey cricketer is heading to Canada after being picked for a franchise tournament!
