A group of Mangawhai residents have been granted permission to take their council to court over rates hikes for a new sewage treatment plant.
An application by the Kaipara District Council to dismiss the case has failed and it will go ahead, Justice Paul Heath of the High Court has decided.
A hearing date has not been set.
The residents' gripe goes back to August 2005, when the Kaipara District Council announced it was borrowing more money to build a new sewage treatment plant at Mangawhai.
The Mangawhai Ratepayers' and Residents' Association believe the rates levied to meet the cost of the project's borrowed costs were unlawful.