This paper examines the possibility of using data warehousing technique in the construction industry to integrate various functional and operational databases which are usually scattered across multiple, dispersed and fragmented departments, units or project sites. The concept of data warehousing is explained with the help of several examples and an insight is provided to the reference architecture of a generic data warehouse. At the end, an example on the design of a data warehouse for building developers is provided Organizations getting larger and amassing ever increasing amounts of data. Data warehousing concept is mainly used to develop decision support systems (DSS ) data warehousing is a collection of decision support technologies, aimed at enabling the knowledge worker (executive, manager, and analyst) to make better and faster decisions. Many organizations are committing considerable human, technical, and financial resources to building and using data warehouses. However, data scattered across multiple sources, in multiple formats. Data warehousing has emerged as an effective mechanism for converting data into useful information. It is an improved approach to integrate data from multiple, often very large, distributed, heterogeneous databases and other information sources. Data warehousing is one of the most important recent developments in the filed of information system. Data warehousing technologies have already been successfully deployed in many industries.