The Polk County assessor’s office revalued 177,000 parcels last year, resulting in the largest increase in property values since 2005, according the assessor’s annual report. The 2017 assessment roll totaled slightly more than $40 billion, the largest ever and representing a 12.4 percent increase from 2016. Residential properties increased 8.2 percent, commercial and industrial property 8.5 percent, and multifamily property 10.7 property. Agricultural property decreased 2.35 percent due to the five-year productivity formula. New construction added more than $1.65 billion to the assessment roll. The biannual reassessments triggered a spike in protests to 8,797, the most since 2005. Of the protests, 51 percent were upheld and 49 percent were denied. Read the report here.