Leeds City Council states that "There are 80 Conservation Areas in the Leeds district" and that "55 of the Conservation Areas have appraisals and management plans, which set out what is special about the area and how to preserve or enhance its character and appearance". On work inside one it states that "planning permission is required for some works that normally wouldn't need it, including small extensions, roof extensions including dormer windows, cladding or rendering, some satellite dishes and radio masts, some chimneys, flues, soil and vent pipes, some solar panels", and it treats listed buildings separately through listed building consent.
The national position a Leeds customer is reading elsewhere is the Planning Portal's, which states that "You do not need to apply for planning permission for repairs, maintenance or minor improvements, such as painting your house", and that 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". It also states that "If you live in a listed building, you will need listed building consent for any significant works whether internal or external".
The council's published Article 4 direction covers conversion of a property into a house in multiple occupation within the mapped areas, and the council's pages do not state an Article 4 rule about painting.
We would explain how you check the conservation boundary, any Article 4 direction, the listed building position and the proposed work with Leeds City Council before confirming whether permission is needed.