Oregon ADU Laws

Complete 2026 guide to accessory dwelling unit regulations

Strong Statewide Law

📋Quick Facts

Owner Occupancy
✓ Not required
Parking
✓ Limited by state
Approval Process
✓ By-right
Effective Date
8/8/2019

📜Recent Legislation

HB 2001 (2019) - Statewide ADU legalization

SB 1051 (2017) - Initial ADU reforms

📖Detailed Analysis

Portland is a national leader in ADU construction. Impact fee waiver in 2010 led to major increase.

Planning an ADU in Oregon?

Use our free tools to analyze your investment opportunity and plan your build.

📬

Get Oregon ADU Law Updates

Laws change fast. Get notified when regulations update in your area.

Browse all states

⚠️ Disclaimer

The information provided on this website is for general informational purposes only and does not constitute legal, financial, or professional advice. ADU laws, regulations, and requirements vary by jurisdiction and change frequently. While we strive to keep this information accurate and up-to-date, we make no representations or warranties of any kind about the completeness, accuracy, reliability, or suitability of this information. Always consult with qualified local professionals, including attorneys, architects, and your local planning department, before making any decisions regarding ADU construction or investment. Use of this information is at your own risk.

ADU Tools by MassDwell

Last updated: February 2026