The Government has approved an expansion of the parliament precinct.

Speaker David Carter expects it'll cost more than $100 million, and is in talks with the Wellington City Council about consent.

The change is supported by all parties except New Zealand First.

The Press Gallery, which only meets 30 percent of the earthquake building code, will be demolished at the end of next year and rebuilt with two extra stories to house Ministers.

The majority of news organisations moved their staff out of the building last week and are currently working out of the parliamentary library.

The $6 million per year lease on Bowen House on Lambton Quay will expire in 2018.