Fire response teams from across the region descended on Masterton company Breadcraft on Saturday after a freezer unit caught fire, with crews "prepared for the worst" with highly flammable materials on site.
Masterton Fire Station officer Doug Flowerday said seven fire crews - consisting of five Wairarapa crews and two specialist crews from the Hutt Valley - responded to the call-out to the artisan bread company on Pragnell St just before 1pm.
The fire is thought to have been caused by an electrical fault behind one of the commercial freezers at the plant.
The freezer was "smouldering" when fire crews arrived and was put out quickly, according to Mr Flowerday.
As it stands the damage was contained to the freezer unit and its contents but Mr Flowerday said it could have been much worse.