Katherine Powell Banz, MAI


Katherine Powell Banz, MAI is a Principal and Certified General Appraiser with Powell Banz Valuation, LLC. She is licensed in Oregon and Washington and has performed a diverse range of commercial valuation assignments throughout the Northwest since joining the firm in 2002. Katie and her husband (Jon Banz, MAI, AI-GRS) purchased the business in January 2014 and rebranded the company Powell Banz Valuation, LLC. Katie and Jon continue the family legacy.

Professional experience includes a wide variety of valuation-related work, including consultation, appraisal, expert witness testimony, and feasibility analysis of income-producing properties; including retail, office, development land, industrial, single and multi-family residential, and special use properties such as churches and schools.

Katie was the 2018 President of the Greater Oregon Chapter of the Appraisal Institute (GOCAI). She was an active GOCAI Board Member from 2012-2020, and serves on the Appraisal Institute Region 1 Nominating Committee. Katie attended the Appraisal Institute’s Leadership Development and Advisory Council in 2006 in Washington, D.C., and helped lobby congress for mortgage fraud legislation. Katie continues her education with the Appraisal Institute and achieved her MAI designation in 2011.

Katie graduated from Linfield College (McMinnville, Oregon) in 1997 with a Bachelor of Arts degree. Following college, she worked as a graphic artist and project manager with the Boeing Company in Seattle until joining Powell Valuation Inc in 2002.

In her spare time, Katie enjoys reading, gardening, striving to live a creative life, and spending time with her husband and Great Dane.

EmailQualificationsOR LicenseWA License


State of Oregon Certified General Appraiser (#C000897)

State of Washington Certified General Appraiser (#1101856)

Designated Member of the Appraisal Institute (#480999)

State of Oregon Supervising Appraiser Certificate

Greater Oregon Chapter of the Appraisal Institute

  • 2021 Region 1 National Nominating Committee
  • 2019-2020 Region 1 Representative
  • 2019 Past President
  • 2018 President
  • 2017 Vice President
  • 2016 Secretary
  • 2015 Treasurer
  • 2012-2014 Board Member

Board Member – Deepwood Museum & Gardens, Salem, Oregon



  • Review Theory – General
  • The Discounted Cash Flow Model: Concepts, Issues & Applications
  • Analyzing Operating Expenses
  • Eminent Domain and Condemnation
  • Litigation Appraising: Specialized Topics and Applications
  • Business Practices and Ethics
  • Office Building Valuation – A Contemporary Perspective
  • Advanced Applications
  • Report Writing
  • Advanced Sales Comparison & Cost Approaches
  • Market Analysis/Highest and Best Use
  • Advanced Income Capitalization
  • Evaluating Commercial Construction
  • Uniform Standards of Professional Practice 15 Hour
  • Uniform Standards of Professional Practice 7 Hour
  • Comprehensive Exam
  • Traditional Demonstration Report


  • Appraisal of Fast Food Facilities
  • Appraisal of Land Subject to Ground Leases

LINFIELD COLLEGE, McMinnville, Oregon, 1993-1997

  • Bachelor of Arts


Magistrate Division of the Oregon Tax Court