PREAMBLE: The valuation of property that is subject to some form of contamination is particularly difficult. Much depends on the nature of the contamination/impairment and the type, and cost, of necessary remediation works. This webinar will look at the background to environmental impairment, the valuation standards that apply to contaminated properties, and how valuation methodology needs to be adapted to meet the demanding requirements for this type of work. It will look at issues concerning the highest and best use of the property as impaired and consider how the three main valuation methods - sales comparison, cost and income approaches - need to be adapted to reflect the contamination. In addition to looking at the cost of necessary remediation works, they will also consider the liability impacts, use limitations, and possible stigma attaching to contaminated properties. The webinar will also cover how to deal with such properties within a mass appraisal environment.