1)
The proposed extension to the garage and summer room to create enlarged summer room in the rear garden by reason of its unsympathetic design, form, size, scale, visual mass, poor choice of finish materials, layout, excessive footprint and siting would appear obtrusive, visually dominant and incongruous in the rear garden. Consequently, the summerhouse would fail to read as an ancillary structure to the host building and would seriously detract from, and harm the listed heritage asset and its setting. The proposal would therefore fail to preserve the special architecture and historic interest of the listed building and group of buildings and their settings for which no public benefits were provided that would outweigh the identified less than substantial harm, contrary to Policies CL4 of the Local Plan 2019.
2)
Due to the lack of information, the applicant has failed to demonstrate that the proposed extension and associated works to the rear of the existing garage/summer room to the Napier Roadside would preserve the special architectural and historic interest of the curtilage listed boundary walls and the setting of the listed building. The proposed works would cause 'less than substantial' harm to the heritage asset without sufficient public benefits to outweigh this harm, and would therefore conflict with the aims of policies CL4 of the Local Plan 2019 and NPPF.