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Reliability of assessment quality measures: Using bootstrapped confidence intervals to verify adequate sample size
No full textTo ensure the accuracy and consistency of mass appraisals, BC Assessment employs various ratio study statistics, including the Median Assessment to Sales Ratio (Med ASR), Coefficient of Dispersion (COD), and Price Related Bias (PRB). These metrics compare sale prices to assessed values across jurisdictions, identifying those that do not meet the International Association of Assessing Officers (IAAO) quality standards. However, the reliability of these statistics diminishes as the number of sales (sample size) decreases, reducing their validity in jurisdictions with limited sales data. This presentation introduces a method to determine whether the sample size is adequate for the metrics to be statistically meaningful. We utilize bootstrapped confidence intervals to assess reliability: a wide confidence interval indicates low reliability and signals the need for a larger sample size. Unlike the traditional approach of setting a uniform minimum sample size, our method evaluates each jurisdiction individually. For example, a jurisdiction with uniform sale records (many strata sales) requires a smaller sample size compared to one with more heterogeneous sale records (numerous detached sales), making a single minimum sample size inappropriate for both. Our approach de-emphasizes ratio studies in jurisdictions with limited sales data, thereby enhancing the overall quality assessment process and ensuring that metrics are only relied upon when supported by sufficient and reliable data
Reconceptualizing virtual assets as taxable property: Legal and administrative implications for Vietnam
No full textThe question of whether virtual assets should be integrated into property tax systems, and how such integration should occur, is not solely a technical matter. Rather, it implicates foundational issues relating to legal ontology, economic classification, and institutional feasibility. Property taxation has traditionally relied on the physicality, permanence, and visibility of taxable subjects (Bird & Slack, 2004). In contrast, virtual assets are decentralized, volatile, and pseudonymous. These characteristics pose significant challenges not only to legal classification but also to the mechanisms of assessment, valuation, and enforcement. Their dematerialized and borderless nature renders conventional property taxation methods inadequate, thereby necessitating a re-evaluation of existing legal doctrines and the development of technologically adaptive regulatory instruments
Subsidized Housing Smackdown: The Main Event
No full textIn this interactive mock trial, Kara “The Hammer” Endicott (real estate developer) challenges the value set by Brad “Nacho Libre” Eldridge (assessor) on the market value of a recently built Section 42 multifamily apartment project. This battle Royale will cover the valuation issues of subsidized housing, and offer strategies for defending the value opinion
How to Remove Barriers to Entry – From Mass Appraisal to Fee Appraisal Accreditation
No full textIndustry partners and leading experts have come together to form IAAO’s Mass Appraisal Experience Credit Task Force. Attendees will leave the session empowered with the understanding and knowledge of the available tools to help advocate for acceptance of mass appraisal experience by their state appraisal licensing board
Strategic and operational planning
No full textMany offices have a vision to modernize their mass appraisal practice, but do not have a concrete, detailed plan that addresses all the required elements to bring their vision to fruition. This workshop walks participants through the steps of building an Operational Plan that includes many of necessary elements, starting with Current State Analysis and working through Controlling the Story; Organizational Structures; Managing Expectations; developing a Phased Approach and Timetable and finally building an outline for a plan for their office. Participants use interactive exercises to work through the steps and elements of building a plan, with lots of opportunities to network with colleagues and share ideas
Central Falls case study - Testing modern approaches to value in a small New England community
No full text2024 was a revaluation year for the City of Central Falls. At 1 square mile and 3000 parcels, it provided a good test bed to compare the efficacy of modern revaluation tools such as regression and AVM versus the time-tested market-adjusted cost that revaluation companies have been using for decades. This case study covers the results of this analysis for both the single-family and multi-family properties
TPP E-Filing in Action: Improving Taxpayer Experience and Operational Efficiency
No full textThis session, presented by Catalis and the Monroe County Property Appraiser, will highlight the successful implementation of a Tangible Personal Property (TPP) e-filing solution. Attendees will learn how the new system improves the taxpayer experience through greater convenience and transparency, while also delivering significant internal efficiencies by streamlining workflows, reducing manual data entry, and enhancing data accuracy
Enhancing AVM accuracy with AI-generated synthetic transactions in data-sparse markets
No full textReviews a case study asking: Can synthetic (artificial) transation data help governments create better mass appraisal models
Beyond Assessment: Uniting CAMA, Analytics, and GIS for Smarter Communities
No full textThe Assessor’s Toolkit of Tomorrow: Analytics, Visualization, and Engagement in Action
Innovation only matters if it works everywhere - and that’s exactly how our platform was designed. Built on a single, configurable code base, our assessor-driven ecosystem scales seamlessly from 1,000 parcels to more than 2.2 million.
In this showcase, you’ll see how one foundation unites CAMA, GIS visualization, advanced statistical analysis with our in-house statisticians, and mobile field data collection with routing. Layer in citizen engagement through Portal and wEdge, and you have a toolkit designed to simplify complexity while elevating transparency.
This is more than software. It’s a proven, scalable toolkit designed to evolve, configured to fit, and built to empower jurisdictions of every size
Examples of Assessing Offices Successfully Using Power BI for Property Assessment
No full textThis presentation will showcase how various assessing offices are successfully leveraging Power BI to gain a deeper understanding of their data