CINCINNATI — Hamilton County homeowners should expect eye-catching mail in the coming weeks: residential property values rose an average of 27 to 28 percent in the county’s latest triennial reassessment, the Hamilton County Auditor’s Office found, according to the Cincinnati Enquirer.
About 99 percent of single-family homeowners will see their home’s assessed value increase, auditor’s office spokesperson Connor Moreton said in a release, the Enquirer reported. Commercial and industrial properties rose an average of 22 percent, and agricultural properties rose an average of 31 percent. The increase is steep, though smaller than the average 34 percent jump in the county’s last full revaluation in 2023.
Ohio law requires counties to update every property’s fair market value every three years. Hamilton County alternates between a full reappraisal, when assessors examine each property individually as they did in 2023, and a triennial update like this one, a statistical review of more than 350,000 parcels based on recent sales, according to the Enquirer.
Owners can look up their new values now at hcauditor.org/triennial.asp, and the auditor’s office will mail value-change notices in the coming weeks, Moreton said, according to the Enquirer. The office will update its property search tool in December, after the state finalizes tax rates affected by the election.
A higher value does not automatically mean a tax bill higher by the same percentage, Moreton said, according to the Enquirer. Ohio law limits most levies to bringing in a set amount of revenue, so when values rise, effective tax rates generally decline. Even so, many Cincinnati and Hamilton County residents will likely pay more in 2027 after voters approved a nearly 50 percent increase in the county’s children’s services levy and a new Cincinnati Public Schools levy that will cost property owners $245 per $100,000 of value for five years, the Enquirer reported.
Owners who believe their new value is wrong can file a complaint with the Hamilton County Board of Revision between January 1 and March 31, 2027, bringing evidence such as a recent sale or an appraisal to support their own estimate of fair market value, according to the Enquirer.
Hamilton County is not alone in the region. In Butler County, the average residential value rose about $44,000, or roughly 19 percent, with commercial and industrial properties up about 20 percent and agricultural properties up about 7 percent, the Enquirer reported, citing the Butler County auditor’s office. Warren County properties will be updated in 2027.
What happens next: watch the mailbox for the auditor’s notice, check the new value online, and mark the January-to-March window if you plan to challenge it — that Board of Revision deadline is the one date every Hamilton County property owner should circle.