Ahead of this weekend's election, Mr Rattenbury said he had received community feedback that suggested people wanted the Greens to remain a key part of the Assembly. He said this had come from Greens volunteers during campaigning and attributed it to the Greens environmental policy.

"Canberrans are really engaged with some of the key issues through having the pandemic this year and the impacts that it's had, it's reminded people that we need to change direction in a lot of ways and so the policies we have been putting forward have been really resonating with people," he said.

"We have been pleased to see environmental issues fronting this election, it's a great outcome for Canberra. It reflects the fact that's what the community wants."

It came as the ACT Greens released its social inclusion plan on Tuesday. As part of the plan, the Greens say foster care should be extended to young Canberrans until they are 21 years old.

"Most young people at that age are still getting a lot of support from their family," ACT Greens community services spokeswoman Emma Davidson said.

"For young people who have started out with a whole lot of difficulties... it's even more important that they have access to support and their carers are able to continue getting the resources to support them."

As well, the party said it will fully fund the ACT carers strategy, conduct a review of investment in community and on-demand bus services and would look at increasing the taxi subsidy scheme.

The Greens said the plan would seeks to fill shortfalls in the social security system, particularly in the areas of caring, disability and elderly support. They said it was important to tackle the issues as part of a COVID-19 recovery.

READ MORE:

Ms Davidson is fighting for a seat in Murrumbidgee. She is fighting to take the place of incumbent Greens MLA Caroline Le Couteur who is retiring. The seat is a key battleground which Ms Le Couteur won by only 400 votes against the Liberals in 2016.

The ACT Greens have held the balance of power in the assembly since Mr Rattenbury was elected in 2008. In each of the three terms, the Greens have formed a parliamentary agreement with Labor.

The agreement is likely to be renewed if Labor is unable to win a majority as Mr Rattenbury has already ruled out forming a coalition with the Canberra Liberals.