Measures aimed at dealing with the housing crisis in Britain are due to be unveiled by ministers today.
They say a million new homes need to be built by 2020 and they want more affordable homes available to rent, rather than for sale.
One of the proposals which could be discussed today is the option of moving green belt boundaries to create extra land to build on.
Plans to build 6,000 houses on green belt land near Sutton Coldfield have already been approved in an attempt to solve Birmingham's housing crisis.
Campaigners against the proposal said the land the government want to build on is the only piece of open space that the city has.
Today's plans are expected to advocate building up, and underground to save space.
The proposals include measures to give councils revised powers to speed up the building of new homes, and to place developments where they are most needed.
Communities Secretary Sajid Javid says decisions to alter green belt boundaries can only be made in the most "exceptional circumstances".