Actually, National denied there
was a housing crisis/shortage, right up until the 2017 election. Suddenly they realised there was a problem and conveniently decided to bring up as an election issue.
Labour has inherited the situation from them and their 9 years of inaction over it.
https://www.rnz.co.nz/news/political...housing-crisis
Unfortunately there's no one silver bullet to fix the problem, but increasing supply by a
lot would be a start.