PLANNING PORTAL ADVICE
So how can this happen?
“Following a grant of planning permission, it may be necessary to make amendments to the originally approved proposals. A non-material amendment may be applied to approve a minor change to the planning permission and does not breach any conditions initially placed on the consent.
If the amendment is not considered minor by the Local Planning Authority, a new planning application will be required.”
Waverley Borough Council have advice consistent with non-material. Changes to existing planning permission If you already have planning permission, you may be able to make small changes to it. This could be moving a door or window or changing a finish. These changes are classed as ‘non-material’.
What is a non-material change?
Whether the change is non-material or not will depend on the circumstances of the case – for example, moving a window could be material if it results in overlooking a neighbour but could be non-material if it does not.
We will not consider the following to be non-material:
increase/decrease in the size of the building/extension
significant increase in the height of an eaves or roof
move of a building or extension, even if it is within the same site area
change of site area (red line) changes that conflict with a specific condition, a significant change in elevation (where the proposal would appear materially different to that permitted), inserting a new feature (such as dormer windows that could create an overlooking problem)
changes which alter the nature or description of the development, multiple minor changes, new works or elements not part of the original scheme
new works or elements not considered by any environmental statement submitted with the application.”