A large crack has appeared in a historic building in downtown Auckland, forcing construction at a neighbouring building site to be halted.
The Wong Doo building on Hobson Street was built about 1885 and is due to be refurbished and incorporated into a retail and apartment complex.
Construction was halted late on Friday after a Radio New Zealand reporter alerted the council to the crack at the back of the two-storey building.
The Auckland Council says its engineers have assessed the building and say movement may have occurred during the construction of a showroom for the new complex.
However, they say there is no immediate danger.
Council heritage manager Noel Reardon says the crack is pre-existing but appears to have widened.
Mr Reardon says the site will be cordoned off and monitored over the weekend.
He says the crack means demolition of the back part of the building may have to be moved to the top of the agenda.
The building's rear is being pulled down to make way for the redevelopment of apartments.
A site meeting will be held on Monday to decide the next step.