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.
"Tropical nights" forecast for the Channel Islands
Daytime highs in the 30s and nighttime temperatures around 20°C are forecast for the Channel Islands.
Les Amis nursing home on track to open this autumn
A new nursing and complex needs home for Les Amis is set to be completed in September.
Candle-lit evening at St Brelade's Bay Beach to remember loved ones
Hundreds of candles will be lit around the beach at St Brelade's tonight (23 May) to remember loved ones islanders have lost.
How to have 'safe and enjoyable' Jersey beaches for summer
The Police's Community Safety Team is delivering Beach Safe awareness events today (Friday 22 May), as lifeguards begin full patrols.
Appeal after woman grabbed by throat in nightclub
Police want to speak to anyone who saw a man grab a woman by the throat in a Jersey nightclub.
Essential work to begin on Springfield Stadium
Work will start this summer on upgrading and refurbishing the Springfield Stadium Grandstand.
Man who dug up cocaine in woods is jailed
A man who dug up cocaine in woods at Grands Vaux has been jailed for six and half years.
Jersey and Guernsey included in UK-Gulf trade deal
Jersey and Guernsey have been included in a landmark UK deal with Gulf states that is being hailed a 'significant' boost to the islands' economies.
