The Rehan family were asleep upstairs in their two storeyed brick home when the truck left Great South Rd about 5.45am.
It is believed that the driver, a man in his 50s, suffered a medical event before his truck smashed through a fence, clipping the side of a house before flattening another fence and crashing to a stop through the front of the Rehan's house.
Raghubit Rehan, who also operates a homeopathy clinic from the site, said he and his wife and their two young children were asleep.
"It sounded like three or four cars had crashed into the fence," he told the Herald.
"We were sleeping upstairs and we heard a big bang.
"We saw from the window that the truck was inside and my kids and wife started screaming."
Rehan, who is known as Dr Preet, said the impact of the crash caved in the house's entrance and front doorway.
Emergency services arrived almost immediately, he said.
The family was currently at their neighbours' house, and were still in shock.
"I'm still shaking," said Rehan.
- By Morgan Tait at NZ Herald
