The Government's challenging Labour's methodology as the political war on housing continues.

Labour's launched an interactive website that it says shows 98 per cent of New Zealanders are affected by housing prices rising faster than wages.

It's pulled together statistics from Quotable Value, census data, Housing New Zealand, and MBIE, to create an interactive housing map.

But Building and Housing Minister Nick Smith said a comparison of wage and house prices needs to be considered alongside interest rates, and needs to be taken over the longer term.

He said the scenario in Auckland is very different to that in Waimate, or Invercargill, in terms of house prices.

"And that's where I think Labour is doing a disservice to New Zealanders with these brash claims of 98 per cent of New Zealand having a housing crisis."

Dr Smith disputes assertions rising house prices are affecting 98 per cent of people saying there are areas, such as Invercargill, Kawerau, or Timaru, where houses are very affordable particularly with the record low interest rates.

"Well Labour's try-hard website is just not credible."

Mr Little said the data shows that while Auckland might have the worst housing situation, the rest of the country is also feeling the pinch.

"Where you ask yourselves how is it that we've come to have 42,000 people homeless in New Zealand, it's because housing generally, whether it's rentals or buying your own, is being put out of reach."