Cotality offers a high-performing suite of world-class property indices that have transformed the way Australians measure and understand changes in residential real estate values.
Understand the Hedonic Regression Model behind our home value indices.
This methodology seeks to overcome the issue of compositional bias associated with median price and repeat sales measures. The premise for this lies in hedonic theory which says that the valueof a composite good, such as a house, is the sum of its components. Thus, by separating the sample of houses into their various structural and locational attributes, the differences in these qualitative factors across houses can be controlled.
Hedonic imputation is a method of imputing the value of dwellings having a certain set of characteristics (but no current sales price) by observing the sales prices and characteristics of other dwellings that do have recent sales prices.
To learn more about the methodology used in the Cotality Home Value indices please refer to the following studies, which have been published in the interests of transparency:
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In compiling this publication, RP Data Pty Ltd trading as Cotality (ABN 67 087 759 171) (“Cotality”) has relied upon information supplied by a number of external sources. Cotality does not warrant its accuracy or completeness and to the full extent allowed by law excludes liability in contract, tort or otherwise, for any loss or damage sustained by subscribers, or by any other person or body corporate arising from or in connection with the supply or use of the whole or any part of the information in this publication through any cause whatsoever and limits any liability it may have to the amount paid to Cotality for the supply of such information.
* Note: Index values for Canberra, Hobart, Darwin and Brisbane excluding Gold Coast, can be found in Monthly Movements. Qtr and Yr changes are rolling 3 & 12-month respectively. Day-to-day movements in the daily Cotality Home Value Index can be impacted by a variety of factors including the flow of transaction data and market events. We urge caution in interpreting daily movements of the index and recommend utilising the daily series to update market trends rather than emphasising short term movements. Use of the daily Cotality Home Value Index is subject to the Cotality Disclaimers located at: www.cotality.com/au/legal/disclaimers.
New South Wales Data
Contains property sales information provided under licence from the Valuer General New South Wales. RP Data Pty Ltd trading as Cotality is authorised as a Property Sales Information provider by the Valuer General New South Wales.
Victorian Data
The State of Victoria owns the copyright in the Property Sales Data and reproduction of that data in any way without the consent of the State of Victoria will constitute a breach of the Copyright
Act 1968 (Cth). The State of Victoria does not warrant the accuracy or completeness of the Property Sales Data and any person using or relying upon such information does so on the basis that the State of Victoria accepts no responsibility or liability whatsoever for any errors, faults, defects or omissions in the information supplied.
Queensland Data
Based on or contains data provided by the State of Queensland (Department of Resources) 2025. In consideration of the State permitting use of this data you acknowledge and agree that the State gives no warranty in relation to the data (including accuracy, reliability, completeness, currency or suitability) and accepts no liability (including without limitation, liability in negligence) for any loss, damage or costs (including consequential damage) relating to any use of the data. Data must not be used for direct marketing or be used in breach of the privacy laws; more information at www.propertydatacodeofconduct.com.au.
South Australian Data
© 2025 Copyright in this information belongs to the South Australian Government and the South Australian Government does not accept any responsibility for the accuracy or completeness of the information or its suitability for any purpose.
Western Australian Data
Information contained within this product includes or is derived from the location information data licensed from Western Australian Land Information Authority (WALIA) (2025) trading as Landgate. Copyright in the location information data remains with WALIA. WALIA does not warrant the accuracy or completeness of the location information data or its suitability for any particular purpose. Western Australian Land Information Authority owns all copyright in the location information which is protected by the Copyright Act 1968 (Cth) and apart from any use as permitted under the fair dealing provisions of the Copyright Act 1968 (Cth), all other rights are reserved and no location information, or part of the location information, may be reproduced, distributed, commercialised or re-used for any other purpose without the prior written permission of Western Australian Land Information Authority (Landgate).
Tasmanian Data
This product incorporates data that is copyright owned by the Crown in Right of Tasmania. The data has been used in the product with the permission of the Crown in Right of Tasmania. The Crown in Right of Tasmania and its employees and agents:
a) give no warranty regarding the data's accuracy, completeness, currency or suitability for any particular purpose; and
b) do not accept liability howsoever arising, including but not limited to negligence for any loss resulting from the use of or reliance upon the data.
Base data from the LIST © State of Tasmania http://www.thelist.tas.gov.au
Australian Capital Territory Data
The Territory Data is the property of the Australian Capital Territory. Any form of Territory Data that is reproduced, stored in a retrieval system or transmitted by any means (electronic, mechanical, microcopying, photocopying, recording or otherwise) must be in accordance with this agreement. Enquiries should be directed to: acepdcustomerservices@act.gov.au.
Director, Customer Coordination, Access Canberra ACT Government. GPO Box 158 Canberra ACT 2601
