Greens NSW would tax big business and property speculators to fund a $2.75 billion local infrastructure and job creation project that will "kick-start" struggling communities, the party's launch was told on Sunday.

In a swipe at the Liberals, whose $20 billion infrastructure pledge is contingent on the privatisation of the state's electricity assets, Greens MLC John Kaye said the party could raise the same amount to "spend on things really worth it for the economy".

The $20 billion would be raised from taxing property speculators and profitable clubs with poker machines, as well as maintaining duties on large business transactions.

From it, $2.2 billion would be channelled over four years to local councils struggling with high-unemployment rates to create 6900 jobs and 2000 training opportunities.

Another $550 million would be spent over four years through councils and Aboriginal Land Councils to build and refurbish small-scale infrastructure, such as storm-water works, childcare centres and bicycle paths.

"As part of our vision for a green jobs-rich future for the state, we want to kick start those local and regional economies that are trapped in a cycle of inter-generational unemployment," Dr Kaye told more than 300 supporters in emerald green at the University of Technology, Sydney.

"This is about lifting areas like the Far West, the Hunter and the Mid North Coast out of the consequences of decades of failed trickle-down economic policies."

From the $20 billion, the Greens also pledged to spend $4.5 billion on public hospitals and schools, $6 billion on the transition to renewable energy, and $4.5 billion on housing affordability.

Sole lower house Greens MP Jamie Parker, seeking to be re-elected in the seat of Balmain, announced an anti-corruption package, saying he will introduce laws that would send corrupt politicians to prison for up to 15 years.

Under the news laws, the assets of politicians would be seized if they cannot explain how they acquired them honestly.

"In this election there's been a deafening silence from the major parties around the issue of corruption, and that's no accident. They've both been found to be fertile breeding ground for corruption and influence peddling," he told the crowd, which included Senator for South Australia Sarah Hanson-Young.

"Today we charge [NSW Premier] Mike Baird and [Labor leader] Luke Foley to match our commitments and fight corruption in NSW."

Jenny Leong, vying for the lower house seat of Newtown, slammed the sell-off of public housing, saying the Greens would instead invest in it and introduce laws that would enable local councils to set affordable housing targets for new dwellings.

"Thanks to ICAC, we know the influence of powerful property developers in this sate has meant that any housing reform is a huge challenge for people," she said.

Apart from the seats of Balmain and Newtown, the Greens believe it has a fighting chance of grabbing Lismore and Ballina because of growing concerns over coal seam gas and TAFE cuts.

"[In Lismore], there is a massive swing away from the Nationals. The Greens have got a fair slice from the Nationals, and I believe it will be a tight, three-way contest," Dr Kaye said.

<a href="/interactive/2015/nsw-election/electorates/electorates.html?el=Balmain" _rte_href="/interactive/2015/nsw-election/electorates/electorates.html?el=Balmain">Key facts on NSW electorates</a>