The Unified Construction Industry Classification, commonly known as Uniclass,[1]​ is a classification language for the construction industry (architecture and engineering), developed with the intention of replacing the previous CI/SfB language.

Its objective is to serve as a scheme to organize library material and to structure data and information related to projects.

It was developed by the National Building Specification (NBS) and published in 1997 by the publications service of the Royal Institute of British Architects (RIBA) in the United Kingdom.

The Construction Project Information Committee (CPIC), representing the four major sponsoring organizations (Construction Confederation, RIBA, Royal Institution of Chartered Surveyors and Chartered Institution of Building Services Enginneers) and the Department of the Environment Construction Sponsorship Directorate were responsible for launching and directing the project.

Uniclass comprises 15 tables, each of which represents a broad field of information from the world of construction.

It is an alphanumeric hierarchical classification, so that each table is coded with a letter of the alphabet. All categories included within said table are numerically coded (using a decimal system), except tables J and K (sections of works), by incorporating these pre-existing classifications.

A. Form of Information

Useful for organizing reference material in a library and also, when used in combined codes, to denote the medium in which the information is published.

B. Thematic disciplines

Appropriate for organizing information based on different disciplines.

C. Management

This table aims to classify project information according to the phase, in the life cycle of a project, in which the information is generated.