The town of Newcastle Emlyn is a conservation area.
Conservation Areas are designated to preserve and enhance the special character of areas of architectural or historic interest. The Council has a duty to consider the designation of such areas under Section 69 of the Planning (Listed Buildings and Conservation Areas) Act 1990. They are selected according to the quality of the area as a whole, including the contribution of key individual or groups of buildings, trees, open space and streetscape.
The purpose of designating a Conservation Area is to provide the council with an additional measure of control over an area that they consider to be of special historic or of architectural value.
This does not mean that development proposals cannot take place, or that works to your property will be automatically refused. It means however that the Council will have regard to the effect of your proposals on the designation in addition to their normal assessment.
Newcastle Emlyn Conservation area map (area shown within the dark border):