Valuation Modeling: The Perfect Crossover between AVM and CAMA

For too long, the worlds of Automated Valuation Modeling (AVM) and Computer-Assisted Mass Appraisal (CAMA) have operated as separate disciplines. Practitioners have been forced to choose a side. But in the era of artificial intelligence and advanced spatial diagnostics, clinging to these isolated silos is no longer just antiquated—it is a disservice to taxpayers and a recipe for institutional collapse.

This book presents Valuation Modeling as the natural evolution — a seamless crossover that combines the statistical rigor of modern data science with the practical and statutory requirements of mass appraisal.

Drawing on more than two decades of experience, the author reveals the Missing Links and Costly Errors that have limited traditional approaches, while demonstrating how to build models that work effectively across both domains. Readers will learn practical forensic techniques, including proper categorical coding, the 2-Pass Outlier Protocol, rigorous representativeness testing, OLS assumption validation, and the powerful Three-Way Forensic Equity Analysis.

Written specifically for the incoming vanguard—reformers, independent consultants, tech-forward professionals, and ambitious entrepreneurs—this book serves as our blueprint to become an elite Crossover Practitioner. It proves that we do not need a multi-million dollar budget, bloated external advisory teams, or legacy vendor constraints to achieve master-level mathematical precision. A lean, focused practice can execute highly advanced, results-oriented projects completely internally.

The future of property valuation lies in the Crossover. This book provides the roadmap.

By Sid Som, MBA, MIM

Copyright June 2026

ISBN: 9798180071934