The main reason for this refusal is given as the disproportionate increase in size of the existing house in a greenbelt location.
The proposed additions are fairly modest, and the existing house is of little character, albeit the proposal is quite modern and not really in-keeping with the countryside setting that is not the issue here. Greenbelt policies are very strict, and it looks like the existing houses has been extended previously and the local authority will take a view on what the original house was in 1947 if not built later.
PAPA Says - need to calculate the volume of the original dwelling and then the volume of the proposals, and if the expansion is in excess of 50% larger then you probably wont get approval, or the alternative is to try to tone-down the design so that it has less-visual impact on the surroundings - less glass, more traditional, but that is only if the Local planning officer is willing to consider this approach.
Cheshire East, a unitary authority in the North West of England, offers a blend of urban and rural environments. Cheshire East Council, as the local planning authority, oversees planning applications and ensures they comply with both national and local policies via its Local Plan. The region comprises 12 town councils, 90 parish or community councils and 4 parish meetings and there is a vast difference in size and profile for each, each contributing to the diverse character of Cheshire East. These administrative divisions are instrumental in shaping the local planning process, striking a delicate balance between development and conservation across the region.