Wright County Assessor Shari Plagge told the board of supervisors Monday that she is getting a lot of calls following last weekâs mailing of new property assessments. She noted that there was a 5.33% increase in assessments overall, with the largest increase in rural residential values. ââPeople who want more information may call the assessors office in Clarion at 515-532 -3737. Those who wish to appeal their assessment to the Wright County Board of Review have until April 30 to do so. First, you should contact the assessor. Then you may file a written request, or you may ask for an oral hearing later this spring in Clarion.