The National Housing Data Agreement (NHDA) is a subsidiary agreement to the 2003 Commonwealth State Housing Agreement. The signatories are the Commonwealth, states and territories, the Australian Bureau of Statistics and the Australian Institute of Health and Welfare.

The NHDA provides the framework for a cooperative approach to national housing information development. The long-term goal of this Agreement is not only to have a workable means of obtaining nationally compatible housing data, but to do so in a way that is compatible and consistent with other information initiatives in Australia, including the Agreement on National Indigenous Housing Information, the National Community Services Information Agreement and the National Health Information Agreement. This enables the compilation of nationally relevant data from locally useful data and reduces the respondent burden on data collectors.

The broad objectives of this Agreement are:

• to develop and improve the quality of, and access to, national housing data
• to reduce duplication of data development and data collections
• to ensure the availability and use of compatible national data among agencies, within and across the different modes of providing assistance, across state, territory and Commonwealth authorities and with other community and human service sectors including health.