Some properties such as flats over commercial properties, studio flats and ex-local authority premises can be viewed as having reduced future attractiveness and as such some lenders may not operate in that market. This may restrict your lending options.
Listed buildings (e.g. Grade 1, Grade 2) may have restrictions on how you can maintain or alter the property as well as buildings near to it (e.g. garage). Some unlisted properties can also be subject to similar restrictions (e.g. in an area of outstanding natural beauty).