A house being transported on State Highway 16 near Kumeu has fallen off a truck, blocking the road and forcing the highway's closure.
Traffic is reportedly backlogged at the site of the fall and NZTA has advised the road will be closed for a long period this morning.
The incident occurred 100m north of the Old North Rd roundabout around 5.50am.
The road is blocked in both directions between Old Railway Rd and Old North Rd. No one was injured, police said.