Two house fires and a commercial blaze kept Auckland firefighters busy overnight.

At one point more than 70 firefighters were battling blazes across the city.

Six crews were called to a house fire on West Coast Rd in Glen Eden about 9pm.

Eight crews fought a blaze in a commercial building on Dominion Rd in Mt Eden, which broke out just before 1am.

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A few minutes later, crews were called out to a small house fire in Halberg St, Glenfield.

Firefighters have remained on stand-by at the Glen Eden and Mt Eden fires all night.

No one was injured.