Accessory Dwelling Unit (ADU) Primer Course

Learn about Accessory Dwelling Units, the latest trend in earning on-property rental income

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Increasing rates of prospective home buyers are interested in building an ADU (Accessory Dwelling Unit or what are also known as granny flats or mother-in-law apartments) on their property to provide income and housing flexibility. Real estate professionals who are on the cutting edge of this emerging development trend can best serve their clients by understanding site eligibility, development process and costs, and the return on investment of ADUs.

Attend this 3-hour training designed to help real estate professionals gain an introduction to ADU development. The course is developed and delivered by ADU guru, Kol Peterson of Accessory Dwelling Strategies LLC and author of Backdoor Revolution- The Definitive Guide to ADU Development. Kol is based in Portland, Oregon, where the epicenter of this movement has taken place and ADUs have recently surpassed single-family home construction in the city.

This course does not offer city-specifc content or provide brokers with an opportunity to earn the ADU Specialist designation. To learn more about regulations in Portland, Bend or Vancouver, WA, please register for our in-person All About ADUs training and consider earning our ADU Specialist designation.

Questions? Contact Heather Kendall at or (503) 968-7160 x20.

Learning Objectives
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  • Review the demographics of current and soon-to-be ADU owners and renters 
  • Understand what makes a property ADU-ready
  • Gain lessons learned from Portland's ADU-championing policies 
  • Understand the ADU design, permitting, and building process (attached, detached, and garage conversion)
  • Analyze cost scenarios, valuation, financing, and revenue-generating options for ADUs 

When & Where
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Online course available on-demand

CEs & Cost
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Continuing Education
OR Real Estate Agency: 3 CEs  
Earth Advantage Broker Renewal: 3 CEs
Accred. Green Appraiser Renewal: 3 CEs

Course Fee
$45 | Regular Admission

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Appraisers, Real Estate Professionals

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Kol Peterson
Kol Peterson: Owner of Accessory Dwelling Strategies LLC
Kol is the author of "Backdoor Revolution - The Definitive Guide to ADU Development" and owner of Accessory Dwelling Strategies LLC, a company dedicated to ADU related education, advocacy and consulting. He edits and manages, a website that addresses ADU policy issues and features an array of ADU projects. Kol also runs Portland’s city-wide ADU tour, and he and his wife also own "Caravan - The Tiny House Hotel" in Portland, Oregon.