A fence was taken out by a large boulder and a large cavity made at the home in Christchurch yesterday. Photo: NZ Herald/ Broadcast Media
The rock took out a fence and left vegetation strewn across a driveway before smashing a large hole into the Avoca Valley Rd building about 4.45pm yesterday.
"It appears that contractors were up on the hill moving rocks and one has gone across the road and into the garage," police said.
No one was home and no one was injured.
A section of the road was closed but reopened after Geo Tech gave the all clear.
WorkSafe has been advised.
