What characterizes a Grade II listed building?

A Grade II listed building is characterized by its historical significance and the need for special considerations in terms of preservation and alteration. This designation is granted to structures of special architectural or historic interest, and it highlights the building’s value in the context of the country’s heritage.

Grade II listed status protects the building's features that contribute to its significance, meaning any alterations, extensions, or demolitions require special permission to ensure that the intrinsic qualities and historical importance of the structure are preserved for future generations. This involves a careful assessment of the proposed changes to ensure they do not detract from the building's character.

The other choices do not accurately reflect the nature of Grade II listings. For instance, a structure built within the last 50 years generally does not qualify for Grade II status, as this designation typically applies to older buildings with historical importance. Additionally, the notion of a building being easily renovated contradicts the stringent regulations placed on listed buildings, which are intended to protect their historical elements. Finally, simply passing standard building codes does not confer historical significance or require special preservation considerations.