Campaigners against a development will not be rolling over despite the plan being recommended for approval.
The multi-phase residential development in Crowmarsh Gifford, proposed by Bloor Homes and Hallam Land Management to the east of Benson Lane, is set to start with 150 houses, to be followed by two subsequent phases.
If planning permission is granted, the village would grow from around 450 households to 760 homes.
Philip Tremayne, from the Save Crowmarsh campaign group, said he expects South Oxfordshire District Council (SODC) to recommend approval.
He said: “SODC are themselves sitting on a derelict site just across the road for the proposed Bloor/Hallam development, in the form of the former council offices destroyed by fire in 2015.
“How can the local planning authority allow a developer to build on a greenfield site whilst they themselves are sitting on a brownfield site, the local community would be happy to see redeveloped.
“Brownfield versus greenfield is a complete no brainer. This does bring into question the relationship between the SODC planning department and developer.”
He added: “We proposed to lobby the planning committee and issue a press release for both local and national press/media to highlight the situation and the arrogance of SODC to highlight the madness in allowing development on a greenfield site when there is a brownfield site only metres away – owned by the local authority.
“As the village action group, we will use everything available at our disposal to try and get this outrageous proposal stopped.
“Crowmarsh runs the real risk of losing its identity and being swamped with unwanted and unnecessary housing by the authority whose role is to protect the village and wishes of the community.”
He added that a decision was to be made on Monday, but has now been delayed until March 29 at a planning meeting in Didcot to allow the planning committee to make a site visit.
In February, representatives at Lightwood, who are behind a development of 80 homes at Newham Green behind Crowmarsh school, said their application is set to be rejected ‘despite the wider benefits’ to the community and the ‘least impact on the village’.
The plan included an extra three acres-plus of land to provide space for 50 off-road parking spaces as well as sports and play areas, and a community building.
A spokesman for SODC said: “Our planning team make recommendations on planning applications based on their merits, in line with policies in our development plans and national guidance.
“The final decision on this case will ultimately be made by the democratically elected planning committee.
“We are currently looking at all possible options for the future of the site – there are a lot of factors to take into account including ensuring best value for money for council tax payers.”
Lightwood director James Sorrentino said: “The Lightwood proposal is an exceptionally philanthropic offer that hasn’t even been considered by ward and council members. Now the village will get more houses than it needs.
“There has to be a balance between growth for growth’s sake and the gentle preserve of village character, not to mention the need for organic expansion to allow the school and the village ecosystem to accommodate new residents.”
Bloor Homes and Hallam Management were not available for comment.