Community leaders fear plans for four new homes in their village could set a precedent for other developments.
The scheme for the Munden House site, on Main Street, Hockwold, is due to go before the West Norfolk Council planning committee on Monday.
Officials have recommended that the plan, submitted by Hall Contracts Ltd, is approved.
But parish councillors have objected to the proposal, arguing that the developer should have stuck to its original plans.
They also maintain that permission was granted for smaller properties and allowing the new proposal would breach conditions of the earlier consent.
The council said: “This application shows that even when a notice has been issued anything can be built. We hope this is not going to set a precedent.”
But the developers maintain the previous consent has been made invalid by the latest scheme, while planning officials reported the scheme was in keeping with the area.
Six letters of support for the application have been submitted to the council, with one claiming the proposal was much better than the “drab, scruffy appearance” of the current building. There have also been three letters of objection.