Areas where the group wanted to see change included the council's response to climate change, community wellbeing, the governance of Far North Holdings, and protection of taonga under Te Tiriti o Waitangi.
Banfield said interactions with the council often left people frustrated, divided and feeling their voices hadn't been heard.
"Already it's clear from people's reactions that they appreciate we have created a practical tool for change, and that it's not just a load of waffle," she said.
The group's 90-day action plan includes declaring a climate emergency, passing resolutions to move to carbon neutrality and zero waste by 2030, introducing more inclusive decision-making processes, and passing a resolution to switch to the STV voting system before the 2022 local elections.
■ The new group will be launched next to the Stone Store, Kerikeri, at 1.30pm this Sunday, September 22. Go to www.seachange.kiwi for more information.