Bedroom Standard (BS) is a set of rules and regulations that are used in the UK to determine the size and occupancy of bedrooms in residential housing. The purpose of BS is to ensure that bedrooms are of a suitable size, have appropriate ventilation and lighting, and are properly furnished to provide a comfortable living space for occupants. BS also sets out the minimum number of bedrooms that should be provided in a dwelling, based on the size and occupancy of the household. BS is applicable to all types of residential dwellings, including houses, flats and other multi-unit dwellings, and is designed to ensure that occupants have adequate living space in accordance with their needs.