National Building Specification

NBS (National Building Specification) is a UK-based business providing construction specification information used by architects, engineers and other building professionals to describe the materials, standards and workmanship of a construction project.

[4] In November 2020, NBS was sold to Hubexo (formerly known as Byggfakta Group), a global company which provides data, insights and software solutions to the construction industry.

[5] In early 2021 the RIBA received £113 million from the sale of its stake in NBS.

[6] NBS maintains and updates Uniclass 2015, a unified classification system for all sectors of the UK construction industry originally released in 1997.

In 2012, NBS launched the National BIM Library, featuring a range of generic and proprietary construction elements suitable for building information modeling.