Calderdale Council states that in a conservation area "Permission is needed for some types of development that you may not need elsewhere, such as: larger extensions; dormer windows; cladding external walls of a house; satellite dishes facing a highway; illuminated advertisements." It lists 21 conservation areas by name, among them Akroydon, Copley, Elland, Halifax Town Centre, Hebden Bridge, Heptonstall, Luddenden, Mytholmroyd, Northowram Village, Ripponden, Savile Park, Skircoat Green, Sowerby Bridge, Stainland, Todmorden, Warley and West Vale. No area named Brighouse or Rastrick appears on that list, which is what the list shows rather than a statement that no designation touches the town, and the council directs people to its environmental map.
On listed buildings Calderdale states "If a building is listed, the whole of the building is protected both internally and externally", that this includes "Any object or structure fixed to a listed building; or within the curtilage of the listed building", and that "Sometimes a particular feature is not mentioned either on the exterior or interior of the building. This does not indicate that it is not of importance or that it can be removed without consent." On Article 4 directions it states "An Article 4 Direction is when a council removes these rights. When this happens, you must get planning permission from us if you want to develop something", and names eight: Eiffel Street, Birchcliffe Road, Melbourne Street, West Laithe, Hangingroyd Lane, Oldham Road, Land at Dukes Cut and Land at rear of 1 to 10 Stocks Gardens.
The national wording a Brighouse customer meets first is the Planning Portal's: "You do not need to apply for planning permission for repairs, maintenance or minor improvements, such as painting your house", while in a Conservation Area, a National Park, an Area of Outstanding Natural Beauty or the Broads "you will need to apply for planning permission before cladding the outside of your house with stone, artificial stone, pebble dash, render, timber, plastic or tiles". The Portal adds that "If you live in a listed building, you will need listed building consent for any significant works whether internal or external".
We would explain how you check the conservation boundary, any Article 4 direction, the listed building position and the proposed work with Calderdale Council before confirming whether permission is needed.