Liverpool City Council has appealed the High Court’s ruling on Calderstones Park.
Judges last month found in favour of campaigners who opposed plans by Redrow build 51 luxury homes on the Harthill Estate, in the South Liverpool park’s boundary.
The developer’s planning permission was approved in 2017 but the High Court’s decision prompted council leader Joe Anderson to pledge an end to the scheme.
However the council have now taken the decision to fight the ruling despite insisting that it does not constitute a revival of Redrow’s defeated proposal.
In an email sent to councillors on Friday, chief executive Tony Reevers said: “I am writing to let you know that the city council has now lodged an appeal over the Harthill scheme, because of the wider ramifications it has for planning policy nationally.
“As you know, the council pledged not to proceed with the proposals and, whatever the result of the appeal, that position will not change.
“That is why we are not appealing the costs we were ordered to pay the group that brought the challenge, and have made a payment of £30,000 towards them.
“The decision made by Mr Justice Kerr however has far-reaching consequences for local authorities in how they deal with land classed as green wedge.
“The judge recognised his decision needed to be scrutinised and – unusually – granted leave for the Court of Appeal to examine his ruling.
“We are appealing to get clarity on the wider issue, so everyone involved in the planning process, whether it is developers, councils, landowners or local residents, has clarity around how planning applications for development on green wedge should be assessed.”