The party will on Monday release its First Nations plan for the territory, which will include a First Nations social justice commissioner role as part of the ACT's Human Rights Commission.

The commissioner would have powers of oversight working for the well-being of Indigenous people in Canberra and advocate for social justice and other reforms.

Mirroring a move made at federal level, the party would want the Office of Aboriginal and Torres Strait Islander Affairs moved into the Chief Minister's directorate, to support whole-of-government policies and programs.

As part of the party's policies, community control of Boomanulla Oval, the Yarramundi Cultural Centre and the Ngunnawal bush healing farm would be handed to the local Indigenous community.

The language centre plan would involve developing a Ngunnawal language program for ACT primary schools and dedicated culture and language programs in schools and after-school programs.

"The Greens acknowledge that the First Nations people of the ACT and surrounding regions were the first sovereign peoples of this place and that they lived on this land according to their own laws, customs and governance systems from time immemorial," the party's spokeswoman on First Nations issues Dr Tjanara Goreng Goreng said.

"They took care of their lands and their peoples and lived by their customary laws which were still in operation when their lands were colonised."

Dr Goreng Goreng, a Wakka Wakka Wulli Wulli woman originally from central Queensland, is one of the party's candidates for Murrumbidgee.

The party says it has consulted with the local Indigenous community when formulating the policies, which will also work toward implementation of the United Nations Declaration on the Rights of Indigenous Peoples.

Among the policies is a commitment to hire 10 First Nations rangers to manage land and environmental resources. There is also $2 million for a First Nations mental health, suicide prevention and post-vention program.

"We will sit with our First Nations families, peoples, organisations and communities, recognising the diversity of histories, views and dreams. We will collaborate recognising that self determination is the basis of all our work together," she said.

"We respect the ways of knowing, being and doing of First Nations peoples and know they must be the foundation of this work together."