Portland work session: assessor warns downtown value drops are shrinking taxable base and increasing "compression"

Portland City Councilors met in a work session Oct. 16 to review the city’s revenue picture and to hear Multnomah County Assessor Michael Vaughn explain how recent declines in downtown commercial market values are reducing the taxable base available to the city.

Councilor Clark said she requested the session “because I think we need to take some time to really be educated about what's happening on the property tax in Portland.” The discussion fed directly into near-term budget work: the finance committee will review the city’s fall technical adjustment ordinance Oct. 20, the full council will consider it in a work session Oct. 22, and the ordinance is scheduled for a first reading Nov. 5.

The why-it-matters paragraph: Portland’s property-tax system is governed by long-standing state limits (Measure 5 and Measure 50) that cap the amounts districts can levy and create a maximum-assessed-value (MAV) construct. When market values fall—especially for large downtown commercial accounts—those caps trigger “compression,” a constitutional adjustment that reduces the taxes districts can collect even if budgeted amounts (the city’s extended taxes) are higher. That dynamic is already reducing revenue available for city services and will be an input to the budget choices the council must make this fall.

How the system works, per the assessor: Michael Vaughn, Multnomah County assessor, summarized the legal and technical framework and the central role of three values used in Oregon property taxation: real market value, maximum assessed value (established under Measure 50 and allowed to grow by up to 3% per year…