King County Department of Assessments

Setting values, serving the community, and promoting fairness and equity.

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Glossary of terms for commercial parcels

MASS APPRAISAL
	The process of valuing a group of properties as of a given date, using standard methods, employing common data, and allowing for statistical testing.
MASS APPRAISAL MODEL
	A mathematical expression of how supply and demand factors interact in a market.
MISCELLANEOUS INCOME
	Income from sources other than actual rent (parking, laundry facilities vending machines and so on).
MODEL
	(1) A representation of how something works. (2) For purposes of appraisal, a representation (in words or an equation) that explains the relationship between values or estimated sale price and variables representing factors of supply and demand.