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 New Zealand 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 caved in the house's entrance and front doorway.
Emergency services arrived almost immediately, he said.
The family were last night at their neighbours' house, and were still in shock, he said. "I'm still shaking."
