TVNZ, too, has been in temporary premises, but a spokeswoman said it was close to signing up for a new facility.
Radio NZ has not had a funding increase since 2009, forcing it to find other ways to make savings rather than cut its services. It intended to go ahead with an online-only youth radio site, which would include some Radio NZ content and "new tailor-made content produced as resources allow".
Mr Griffin said he believed there was a market for a web-based station aimed at youth and it would be a minimal cost.
He said ensuring Radio NZ maintained its services within its current funding was a challenge - it made about $2.5 million from selling some assets, including land in Wiri which it had used for now-redundant radio towers. It had also sold two of Concert Radio's grand pianos for about $100,000.
There had been significant growth in downloads of its podcasts and Mr Griffin had considered charging people overseas for downloads.
However, he said, that would be contrary to the spirit of Radio NZ's charter, and foreign use was low.