In the interest of improving housing assistance outcomes, governments across Australia have jointly acknowledged the importance of consistent, accurate, reliable and timely housing information. The development of the National Housing Data Agreement (NHDA) recognises the need for national standards in housing information.The Australian Institute of Health and Welfare as Party to the NHDA, and secretariat to its committees, has published this booklet to inform community discussion and debate and promote the aims and objectives of the agreement. This booklet contains the NHDA as signed by the parties.