The destruction of a popular play area in Brackley has angered neighbours and regular users of the site.
An open green space at the end of Nether Close has been closed following works by Anglian Water to build a pumping station, pictured.
Dad Alan Smith lives on Glebe Drive and visits the area regularly with his children.
He said: “I was horrified because we had gone down there to play and there was literally the whole area covered in with blue fencing.
“I think all the play areas in Brackley are well used. This one backs on to the embankment so children play on that too. It makes quite a nice area.”
He added Anglian Water had written to residents to inform them works would begin on a new pumping station.
Mr Smith had thought this meant enlarging the pump which was already on site rather than the building works which have begun.
Following complaints from neighbours, South Northants Council (SNC) asked Anglian Water to halt works while they investigated. An SNC spokesman said: “The current works being carried out by Anglian Water were not part of the original planning application for the development at Radstone Fields.
“The work is for the drainage system for the Radstone Fields development as well as other developments within the town.”
Anglian Water does not need planning permission for any works which are carried out underground but would need permission for anything permanent above ground.
The spokesman added: “We are waiting to receive the application from Anglian Water where the pumping station will be a permanent feature.
“We understand that Anglian Water has sent letters out to local residents providing information about the proposed pumping station.”
Mr Smith added if Anglian Water were to submit a planning application for a permanent building he would oppose the loss of the open green space. Anglian Water was unavilable for comment.