Assessor: Sue Martin
Office Hours: Monday thru Friday, 8:30 a.m. to 5:00 p.m. We are closed the second Thursday of each month from 8:30 a.m. to 12:00 p.m. for staff work sessions and training.
Location: Columbia County Courthouse Annex, 230 Strand, Saint Helens, Oregon
Phone: 503-397-2240 Fax: 503-397-5153
Search for Assessment and Tax Data Online
Mass Appraisal Setup Study Summary
The Assessor's appraisal staff spend approximately two months every year analyzing the current market and developing new land schedules, local cost modifiers, depreciation schedules and other costs/adjustments necessary for use in mass appraisal of all residential properties in Columbia County. This year, these factors will be used to reappraise all residential properties in the Vernonia Area, appraise all residential new construction in the county and to recalculate all remaining residential properties in the county based on existing inventory. For 2018, a new publication summarizing the setup process, analysis and conclusions for each of these factors has been developed and is available for download below. The actual raw data used in the analysis and conclusion is available for review in our office.
Publications and Presentations
Faced with continued budget shortfalls and limited resources, Columbia County Property Appraisers developed a more efficient method of inspections that increased productivity and morale while maintaining a safe work environment. This is a powerpoint presentation video narrated by the appraisal staff.
Written by Tom Linhares, retired director of Multnomah County Tax Supervising & Conservation Commission, and previous Columbia County Assessor
Short video presentation on the changes to Oregon's Property System since 1990 and the limitations of our current system.
The mission of the Columbia County Assessor's Office is to apportion the cost of supporting local public service districts, on behalf of the patrons of those districts, so no taxpayer is required to pay more or less than their fair share by annually producing an accurate and timely assessment roll that complies with Oregon Revised Statutes and Oregon Administrative Rules.