The London mayor has launched new Supplementary Planning Guidance in a determined move to get more families to move back to the capital's core.
The guidance gives details of the mayor's policy on housing schemes and mixed-use proposals.
Speaking yesterday, Livingstone said: 'In 2004 levels of house building in London were at their highest levels since 1982.
'The rate at which new homes are being constructed is a lot healthier now than it was five years ago and is more than meeting the current London Plan target of 23,000 new homes a year.
These new homes are vital to meet the needs of a growing population and deal with historic shortages of housing in the capital.
'This new guidance also identifies the need for new homes for families, which means homes of three bedrooms and above - and encourages boroughs and developers to build family homes in addition to homes with one and two bedrooms,' he added.