What is Automated Valuation Model?

Legal Definition
Automated valuation model (AVM) is the name given to a service that can provide real estate property valuations using mathematical modelling combined with a database. Most AVMs calculate a property’s value at a specific point in time by analyzing values of comparable properties. Some also take into account previous surveyor valuations, historical house price movements and user inputs (e.g. number of bedrooms, property improvements, etc.).

Appraisers, investment professionals and lending institutions use AVM technology in their analysis of residential property. An AVM is a residential valuation report that can be obtained in a matter of seconds. It is a technology-driven report. The product of an automated valuation technology comes from analysis of public record data and computer decision logic combined to provide a calculated estimate of a probable selling price of a residential property. An AVM generally uses a combination of two types of evaluation, a hedonic model and a repeat sales index. The results of each are weighted, analyzed and then reported as a final estimate of value based on a requested date.

An AVM typically includes:

In the late 1990s, this technology was used primarily by institutional investors to determine risk when purchasing collateralized mortgage loans.
-- Wikipedia