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Here’s how we use this sale data to estimate Fair Market Values of
homes in Cook County:

It starts with collecting sale data. Each individual home’s sale price reflects a unique combination
of characteristics – such as square footage, age, and location. Our data systems attempt to
screen out non arms-length transactions.

Mass appraisal leverages vast amounts of sale data to detect trends in how sale prices are
affected by characteristics. Our office uses a Computer Assisted Mass Appraisal (CAMA) system
and skilled residential analysts to produce estimates of property values. Some neighborhoods have
higher sale prices than others. Smaller homes tend to have lower sale prices and larger homes
tend to have higher sale prices.

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