"The reason we are producing these is that being under 10sq m, they do not require building consent," Reynolds said.
"They come as a kitset, floor, four walls and roof and are put together in about an hour. The walls are joined at the corners," he said.
"We have sold five and are keeping one for display and inspection purposes. We placed an ad in the Manukau Courier and are now filling the second container," Reynolds said.
Fletcher Building is examining building houses en masse in a factory in New Zealand.
Graham Darlow, Fletcher Construction chief executive, said last week investigations were under way but nothing had been decided.
Reynolds said bigger houses could easily be built at the Chinese factory.
"As far as bigger houses go, we are only limited by what we can fit in a container, Reynolds said.
"With a standard 2.4m stud height, that is no problem," he said.
"We can prefabricate wall panels up to 10m long.
"Initially our designs will be mono-pitch for ease of packing flat roof panels and we have designed a click together flooring system."