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Information verification is an important factor in commercial valuation practice. Valuers use their professional autonomy to decide on the level of verification required, thereby creating an opportunity for client-related judgement bias in valuation. The purpose of this paper is to assess the manifestation of client attachment risks in information verification.

A case-based questionnaire was used to retrieve data from 290 commercial valuation professionals in the Netherlands, providing a 15 per cent response rate of the Dutch commercial valuation population. Descriptive and inferential statistics have been used to test research hypotheses involving relations between information verification and professional features that may indicate client attachment such as an executive job level and brokerage experience.

The results reveal that valuers acting at partner level within their organisation obtain lower scores on information verification compared to lower-ranked valuers. Also, brokerage experience correlates negatively to information verification of valuation professionals. Both findings have statistical significance.

The results reflect valuers’ reasoning behaviour rather than actual behaviour. Replication of findings through experimental design will contribute to research validity.

Maintaining close client contact in a competitive environment is important for business continuity yet may foster client attachment. The associated downside risks in valuation practice call for higher awareness of (subconscious) client influence and the development of attitudinal scepticism in valuer training programmes.

This paper is one of the few that explore possible sources of valuer judgement bias by relating client-friendly valuer features to a key area of valuation i.e. information verification.

Valuation is a professional activity based on international and local standards. In the valuation process more than one method can be modified. In this case, a final reconciliation of different opinions of value may be required. It is a matter of fact that the final result of these different valuation methods may vary. Therefore, in the final part of the valuation process, the valuer is required to assign a weight to the different methodologies to reach an appropriate opinion of value. This process is essentially based on valuer’s expertise. This paper aims to propose an automatic procedure of calculating the weights to assist the valuer in the valuation process.

The work provides methodologies to assign the weights through simple mathematical procedures that can be used to support subjective judgement in the valuation process. The models proposed can be applied to other phases of reconciliation inside the valuation process and are based on the collection of previous property data in the same market segment.

Two different methodologies are proposed to support valuers in the valuation process and in particular in the phase of the choice of the weights for final reconciliation purposes.

The implication is the development of an information system to support the appraiser in providing these weights. The models proposed are only two but represent a future, much larger field of research.

The models may help in determining more consistent valuation reports.

Consistent valuation reports for the determination of mortgage lending value may contribute to the stability of the social and economic system, especially after the 2008 non-agency mortgage crisis.

These are original models proposed in literature for such kind of problems.

The purpose of this paper is to identify the core dimensions of problem solving of experts in commercial valuation in order to provide a rich stimulus for managing current practice and enabling future development.

The study adopted a cognitive position but emphasised understanding the everyday commercial property valuation practice in a naturalistic context and from the participants’ perspectives. Given this, a grounded theory approach was employed as a research strategy to guide the data collection and surface theoretical interpretations. Data were obtained through in-depth interviews with practicing valuers working in private real estate firms within metropolitan Birmingham, UK.

The interviews uncover four dimensions of experts’ problem-solving practice in commercial valuation: multidimensional, domain-specific knowledge base; cognitive process that is centred on analysis and reflection; collaborative problem-solving venture with colleagues; and professional practice issues awareness. A conceptual model is proposed which integrates these dimensions enabling a clearer understanding of the nature of valuation work.

This study was designed to be descriptive and theory generating, thus, the findings cannot be generalised as the sample was confined to one city and consists of a small number of senior practicing valuers. Therefore, the findings may not be fully applicable to other practicing valuers, other geographical locations or more widely to other types of property valuation. Nevertheless, the findings provide an important cognitive framework which can be verified by other researchers seeking to examine the practice of expert valuers.

The identification of the core dimensions of expert problem solving in commercial property valuation is shown to have implications for valuation practice, education and continued research. The valuation practice environments need to develop mechanisms to provide time that would enable these multi-dimensions of professional competence to be developed. Further work is needed to expand and refine the model across expert practice in other specialty areas of valuation practice.

This study expands the current understanding of valuation process to areas of expertise that have received less coverage in behavioural valuation literature, that is, the central role of knowledge and cognition and how these are integrated for effective valuation problem solving and decision making.

The purpose of this paper aims to disclose shared beliefs and understandings about the concept of professionalism amongst Dutch commercial real estate valuers. It examines prevailing logics of action in a mature European valuation industry and reflects on the potential influence of these logics on the occurrence of judgement bias in valuation.

The underlying study adopted a grounded theory approach to facilitate reflexive in-depth interview sessions with 20 experienced valuation professionals in the Netherlands. Emerging data on core categories of professionalism were initially identified and grouped; and subsequently conceptualised into ideal role types of valuers using institutional logics theory.

Three different ideal types appear to guide Dutch valuation practice: the expert, the service provider and the reporter. The expert emphasises professional standards and technical quality, while the service provider advocates commercial quality and the reporter aims to uphold procedural quality. The authors find that the attention for technical quality associated with the expert role may be at risk of underexposure, fostering concerns about judgement quality and associated bias risks.

The potential impact of both commercial and bureaucratic logics on valuation quality may raise authoritative and educational concerns over judgement bias effects. However, while trends in professionalism may transcend national boundaries, the specifics of local real estate market structures and regulations require replication of results in other markets.

Institutional logics provide an alternative, socio-economic perspective on present-day valuer behaviour that progresses the understanding of the valuer–client relationship, thereby advancing the knowledge base on valuer judgement and client influence. Furthermore, the authors' role typology offers future research opportunities in terms of measurement and explanation of differences.

The purpose of this research is to examine whether valuers consider and interpret intrinsic value elements in a residential property the same way in a familiar location. The price people pay for a complex commodity like residential property is a sum of the utility of various intrinsic and extrinsic characteristics. The skill of the valuer rests in the recognition of value‐enhancing elements in order to arrive at a value for the subject property.

Relevant data for the study were gathered from a controlled‐experiment involving some residential properties and administration of questionnaires backed up with oral interviews on a random sample of 59 valuation firms in metropolitan Lagos, a commercial nerve‐center in the country. The data were analyzed using both descriptive statistics and analysis of variance.

The study showed that there are differences in the means and interpretation of value‐enhancing variables amongst valuation firms sampled. The study, inter alia, concluded that non‐duplicative nature of real estate, differences in the skills and degree of technical competence of the valuation firms including length of practice, absence of a centralized database and lack of valuation practice statements as well as updated guidance notes are the key factors, amongst others, responsible for the variability in the valuers' judgement in the study area.

The paper contributes to the empirical literature in valuation accuracy by establishing the level of interpretative errors in residential property valuations and the key factors responsible for the variability in the valuers' judgement in the study area.

The purpose of this paper is to explore the role knowledge plays in expert commercial valuer practice to unpack the way theoretical and experiential knowledge operates in order to improve practice and education.

Adopting a cognitivist perspective and identifying meta-reasoning, using a grounded theory methodology, through the study of 11 chartered valuation surveyors practicing in Birmingham, United Kingdom, the distinctive theoretical and experiential knowledge they used was elicited through their in-depth reflection on a valuation task followed by analytical interviews exploring meaning and reasons of actions described.

The results confirmed that multi-sourced and rich valuation knowledge was a key attribute of a valuation expert. However, the experiential knowledge was not used to undertake the task but to select the methods and knowledge appropriate for the task and context. This meta-reasoning is a key to the speed, accuracy and justification of their practices. Thus, the experience gained from many years of valuation provides expert valuers with meta-reasoning involving knowledge of what, how and when to deal with problems in different circumstances such as the knowledge of markets and handling of clients.

Making meta-reasoning a key aspect of valuation will identify its characteristics more clearly, thus assisting the development of practitioners and providing a new focus for education to advance professional goals.

Meta-reasoning and meta-cognitive knowledge have not been identified as a key to successful valuation practice. This meta-reasoning allows a subtle balance of theory and experience in valuation practice that is appropriate to the situation.

The property valuation process involves the property valuer expressing expertise in reaction to a client' instruction. However, there are instances where clients, driven by self-interest, impose their will to influence valuers into returning property valuation figures that are not the true reflection of the valuer's assessment. This paper set out to revisit the issue of client influence in property valuation by conducting a scoping review to establish key findings, gaps, implications and solutions.

In total, 21 articles on client influence published from 1997 till date were systematically obtained from Scopus, Web of Science, Google Scholar and through citation searching and reviewed through a “Patterns, Advances, Gaps, Evidence for practice and Research recommendations (PAGER)” framework. Further analysis and visualisation were performed using VOSviewer software.

This study found that based on the number of studies, the issue of client influence has received empirical attention, which is few and far between, with financial institutions identified as the major culprits in most of those studies. One core reason for this is the stakes involved in the finance sector, which relies on property valuation for loan disbursement and performance measurement. Furthermore, previous studies have focused on identifying the issue through the lens of the property valuer without giving recourse to the client's perspective on what may drive the issue.

This study provides evidence that the issue of client influence persists, with some elements of bias in the methodology. Furthermore, the solutions proffered have focused on the valuer and have not been tested to ascertain their effectiveness. Future studies can consider examining the issue from the perspective of financial institutions.

This study is one of the first review studies on client influence on property valuation. It is also the first to identify a pattern in client influence studies that points to the issue being perpetuated by financial institutions. Furthermore, it is the first in recent time to reveal how limited study has been conducted in the area as well as the solutions which have neither been tested nor implemented.

The purpose of this paper is twofold: first, to suggest a modified sales comparison model that is scalable and adaptable to value under conditions of certainty and uncertainty. The model can potentially be applied to residential property, non-residential property and large item plant and machinery in determining the value, rental or capitalisation rate. The second purpose is to address practitioner and end user bias, which if unaddressed can lead to potentially inconsistent valuation results.

Literature was reviewed on decision theory, specifically cognitive limitations, heuristics and biases. A qualitative approach is followed in the paper although the output of the proposed model itself is quantitative.

The paper argues that practitioners and end users alike tend to avoid advanced statistical techniques when valuing under conditions of certainty, while advanced statistical techniques would not be possible under conditions of uncertainty. In addition, practitioners can, due to the representative heuristic, be over-confident in their ability, skill or knowledge when performing valuations under conditions of certainty. When valuing under conditions of uncertainty, practitioners tend to avoid simple rule models as they consider the process too unique to be standardised. The combined effect is inconsistent valuation results unless it can potentially be addressed through an integrated and modified sales comparison model that takes into account varying degrees of certainty and uncertainty.

The proposed modified sales comparison model is an integrated model that can be adopted by practitioners in valuing residential, non-residential and large plant and machinery. It can potentially be used to value under conditions of certainty and uncertainty and improve valuation consistency. End users such as mortgage lenders and investors can benefit from the adoption of this model.

The aim of this paper is to propose an integrated and modified sales comparison model for valuing under conditions of certainty, normal uncertainty and abnormal uncertainty. The integrated model can value based on direct comparison under conditions of certainty and uncertainty while addressing the in practice avoidance of advanced statistical techniques and the implications of the representative heuristic and halo effect as cognitive biases on valuation consistency.

An understanding of uncertainty has always been an integral part of property valuations. No valuation is certain, and the valuer needs to convey to the user of the valuation in the degree of uncertainty pertaining to the market value.

This practice briefing is a short overview of the importance of understanding uncertainty in valuation in normal markets and the particular difficulties now with the material uncertainty created by the COVID-19 pandemic.

This paper discusses how important it is for the valuer and the client to communicate and understand the uncertainty in the market at any point of time. The COVID-19 has had a significant impact on property values and the importance of clarity within valuation reports.

This paper looks at the importance of placing capital and rental value changes due to material uncertainty in valuation reports.

This provides guidance on how professional bodies are advising their members, around the world, on how to report valuations and market value in the context of material uncertainty.

There will always be a degree of uncertainty in any valuation, but it should be incumbent upon the valuer to report “abnormal uncertainty”. This arises when some particular condition of the market or the property leads to the valuer being unable to value with the confidence of accuracy which might normally be expected. Abnormal uncertainty now features in the RICS Appraisal and Valuation Manual and later in this paper we consider how the valuer might identify and measure the degree of abnormal uncertainty. But this paper is predominantly concerned with “normal uncertainty”, which hereafter we will term only as “uncertainty”. The thesis of this paper is that uncertainty is a real and universal phenomenon in valuation. The sources of uncertainty are rational and can be identified. They can be described in a practical manner, and, above all, the process of identification and description will greatly assist many clients, and will improve the content and the credibility of the valuer’s work. Common professional standards and methods should be developed for measuring and expressing valuation uncertainty (Recommendation 34, Mallinson Report, RICS, 1994).