A Christchurch pub has been significantly damaged by a fire overnight.

Crews were called to Mad’z Drink N Dine, on Main North Rd in Papanui, after a member of the public spotted smoke just after midnight.

Four trucks responded and the blaze was extinguished about an hour later.

Mad'z Drink N Dine bar on Main North Rd in Papanui, Christchurch, has been damaged in a fire overnight. Photo / George Heard

The cause of the fire is not being treated as suspicious.