Trevor Mallard has revealed details of a plan to upgrade Parliament with several new buildings.
On Tuesday, the Speaker of the House proposed a new six-storey office block atop Parliament's car-park. Also planned is a three-storey building to replace the current earthquake-prone building for ministerial offices and a two-storey building for security.
Mallard said the current Parliament buildings are "not fit for purpose".
"[The buildings] can no longer effectively support a modern, accessible Parliament."
The funding for the slew of new buildings is yet to be revealed, but Mallard confirmed it would be taken from the 2022 Budget.
In 2020, Bowen House, one of Parliament's buildings, was deemed earthquake-prone, forcing hundreds of MPs, staffers and ministers to relocate into other parts of the Parliamentary precinct.
This has led to overcrowding in other buildings with MPs stuffed into the library and several other open-plan offices.