Treasurer Dominic Perrottet and Family and Community Services workers help homeless people in Woolloomooloo. Credit:Dominic Lorrimer

People sleeping rough on Sydney's streets and victims of domestic violence will be given extra support to find a place to call home as part of a boost to the state government's homelessness strategy.

Treasurer Dominic Perrottet and Minister for Family and Community Services and Social Housing Pru Goward said next week's budget would include more than $1 billion for homelessness services over the next four years.

It includes $61 million of new funding to implement the Homelessness Strategy, with more outreach services for rough sleepers, detailed assessment of what brings someone to be homeless and support to maintain a tenancy.

“The new funding will provide more than $9 million to provide additional transitional accommodation and builds on last year’s budget investment to provide more support packages for rough sleepers,” Mr Perrottet said.