Two separate fires destroyed an inner-city car dealership and abandoned retirement village in Brisbane over the weekend.

Up to 25 firefighters battled a blaze at a used car business on Lutwyche Road early Saturday morning, closing surrounding streets as they controlled the fire and investigated the scene.

Across the river, in Carina Heights, an abandoned retirement village also went up in flames, the blaze leaving extensive damage and ‘only a few sheds out the back’ according to a Queensland Fire and Emergency Service spokeswoman.