All three emergency services were called to the old Water's Edge Hotel at Bouley Bay early Saturday, 28 March.
Fire crews, the ambulance and police were at the scene shortly after 9 this morning (28 March).
Pictures on social media show fire crews running a hose along the outside of the former Water's Edge Hotel.
The extent of the damage is unclear at this stage as is any word of people involved or injuries.
The building closed as an hotel in 2017 and was bought for redevelopment into a luxury home with certain planning caveats.

Candle-lit evening at St Brelade's Bay Beach to remember loved ones
How to have 'safe and enjoyable' Jersey beaches for summer
Appeal after woman grabbed by throat in nightclub
Essential work to begin on Springfield Stadium
Man who dug up cocaine in woods is jailed
Jersey and Guernsey included in UK-Gulf trade deal
Man jailed for series of violent assaults
Woman jailed for trying to smuggle cocaine into Jersey