But Humphries said land tax made little sense.
"Why on earth is the Government not introducing a stamp duty like most other counties as opposed to a land tax for foreign investment?" Humphries asked, citing the Australian state of Victoria which has increased stamp duty for foreign investors from 3 per cent to 7 per cent.
"It's a no-brainer as we have clear precedents with many other counties such as Australia and Singapore," Humphries said.
"We need to make it clear: it's for foreign investment or for investment generally but not when you're buying your own house. It's not just the foreign investors fuelling this market but people buying second and third homes because the interest rates are so low.
"It can be changed, increased over time or decreased, depending on the market. There's no reason if we had a big downturn in the market, you couldn't put it back to zero.
"The income it generates could be distributed to the Government and also territorial authorities where the houses are being built. It would give the local councils revenue for their activity - providing infrastructure, helping to pay the consenting process and inspections. Why can't it be used for something like the City Rail Link in Auckland, for example?" Humphries asked.
New Zealand once had a stamp duty on property purchases but it was abolished last century.