Overtaxed Detroit homeowners may soon see relief from inflated property assessments: The state's recent investigation into the city's Assessments Division has them promising a city-wide reassessment, something that hasn't been done since the 1960s. The process of valuing every Detroit property is expected to take 3-5 years. Too long? Compare it to this gem of a fact: The average Detroit property hasn't been visited by an assessor in 30 years. THIRTY YEARS. If you're a fan of those sorts of unbelievable DetroitFacts, read more at the Detroit News.