A fire has ruined a building on Amber Island on Kennisis Lake.

Dysart et al Fire Chief Mike Iles says on Tuesday, 11 firefighters responded by boat to the fire.

He says once they arrived at 11:40am, the structure had already collapsed.

Iles says they were on scene for three hours putting out hot spots to prevent the fire from spreading.

He says no one was home at the time. The estimated damage is $150,000.