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PPS 6: Planning, Archaeology and The Built Heritage
Annex C: Grading of Listed Buildings

C9 Buildings listed by the Department are divided into three grades; A, B+ and B to give an indication of their relative importance. The gradings are not statutory but they are used by the Department as a management tool to help in administering levels of grant to owners of listed buildings. The categories contained within the list can be briefly defined as follows:
Grade A : buildings of greatest importance to Northern Ireland including both outstanding architectural set-pieces and the least altered examples of each representative style, period and grouping. There are 193 buildings in this category (June 1997).
Grade B+ : buildings which might have merited grade A status but for detracting features such as an incomplete design, lower quality additions or alterations. Also included are buildings that because of exceptional features, interiors or environmental qualities are clearly above the general standard set by grade B buildings. A building may merit listing as grade B+ where its historic importance is greater than a similar building listed as grade B. There are 388 buildings listed in this category (June 1997).
Grade B : buildings of local importance and good examples of a particular period or style. A degree of alteration or imperfection of design may be acceptable. There are 7,439 buildings in this category (June 1997). Since 1987 the Department has been banding Grade B buildings into two groups namely B1 and B2.
C10 Generally B1 is chosen for buildings that qualify for listing by virtue of a relatively wide selection of attributes. Usually these will include interior features or where one or more features are of exceptional quality and/or interest. B2 is chosen for buildings that qualify for listing by virtue of only a few attributes. An example would be a building sited within a conservation area where the quality of its architectural appearance raises it appreciably above the general standard of buildings within the conservation area.
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