Firefighters with eight appliances were battling a fire at Blackboys in the early hours of this morning.
East Sussex fire service was called just after 11pm with crews from Uckfield, Heathfield, and Barcombe arriving first.
By 3am there were eight appliances on the scene at commercial premises in Lewes Road, Blackboys.
The fire was said to be under control, but crews were expected to remain on site for the next few hours.
An investigation is scheduled to take place today.