The HomeStart scheme would ensure people could get into their first home, particularly when taken with the Reserve Bank's decision to tighten LVR rules for investors in Auckland - changes that will come into effect from November 1, Dr Smith said.
However, Labour leader Andrew Little said the scheme would bring little comfort to those in Auckland, where house prices at the lower end of the market had eclipsed the subsidies over the same period.
"Even with that help, many people - young couples and others - are still finding that home ownership in Auckland is way out of reach.
"An extra subsidy like this, the international evidence is it doesn't help housing affordability. In fact, sometimes it can put upward pressure on prices and put them further out of reach.
"The real answer to housing affordability is building more houses. And that's what we need to do."
KiwiSaver HomeStart grant report