Lawyers acting for residents opposed to 1,700 homes being built on the town’s outskirts have lodged a complaint with the High Court.
Campaigners felt Mansfield District Council’s decision to approve plans for the Lindhurst development was unlawful and instructed their solicitor to demand its reversal.
Coun Steve Garner, Nottinghamshire County Councillor for Mansfield South, said the district council’s planning committee was not fully informed about Natural England’s concerns about the scheme.
The authority was given until 4th July to reply to a letter from the residents’ solicitor so they have pressed ahead with the writ saying the response was unsatisfactory.
Coun Garner said: “On the night of that awful planning committee meeting I vowed that the community would challenge the decision.
“Now two years later that is exactly what we are doing. We are looking for justice. I want to thank all those who have come on board to help us bring our case to the High Court.”
The development would effectively be a new township with shops, healthcare, schools, leisure centres, a cemetery and a community park.
But residents fear the project would be a major threat to the woodlark and nightjar - two protected bird species which inhabit part of the land.
Martyn Saxton, head of planning at Mansfield District Council, said: “Mansfield District Council does not accept that the granting of planning permission is flawed or that it has acted unlawfully.”