IL HB0810

Creates new Section 12-13 requiring chief county assessment officers and township assessors to post revised or corrected property assessments on their websites within 2 weeks, along with detailed explanations of the revisions.

Requires assessors to post quality metrics on their websites including the total number of board of review decisions, Property Tax Appeal Board decisions, and circuit court proceedings affecting assessments in the previous 5 years, and the total number of assessments performed in the previous 2 years.

Extends the deadline to file assessment complaints to one year after a comparable property's assessed value is revised or corrected by board of review decision, Property Tax Appeal Board decision, circuit court order, or certificate of error.

Extends the complaint deadline to one year after a taxpayer discovers, or reasonably should discover, an error in comparable property information posted on the assessor's website under Section 12-13.

Makes the chief county assessment officer responsible for the accuracy of all information posted on the assessor's website and responsible for ensuring township assessors comply with posting requirements.