Manchester City Council's conservation areas page names 34 areas, weighted to the centre and the south, including Ancoats, Castlefield, Chorlton Green, Chorltonville, Crumpsall Green, Crumpsall Lane, Didsbury St James, Northenden, Victoria Park, Whalley Range and Withington.
Manchester also operates a city wide Article 4 direction on conversions. The council states that it "currently has Article 4 Directions removing permitted development rights for change of use from a Class C3 dwellinghouse to a Class C4 house in multiple occupation across the City and further Article 4 Directions restricting change of use from office/light industrial use to residential use in certain areas". A conversion job anywhere in the city needs planning permission on that wording, not only in the student belt.
On householder work, the council's permitted development page notes that since 1 October 2008 planning permission is required for laying a traditional impermeable driveway or other hard surface in a front garden, unless the surfacing is permeable or the rainwater is directed to a lawn or border, and that in a conservation area or on a listed building "further restrictions will be in place".
We would build a page that quotes the council's own wording on the conversion direction, explains which jobs need permission, and says that you check the address against the conservation boundary before you quote.