ADU Regulations in Salem, Oregon
Updated September 29, 2026
Oregon's capital city in Marion County, Salem permits ADUs by right under HB 2001. As a mid-sized city with growing housing demand, Salem's Planning Division processes ADU applications under the state's streamlined by-right framework.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Salem as of 2026. Regulations are governed by Oregon's HB 2001 (2019) which requires ADU approval by-right in all residential zones statewide.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,200 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Not required |
| Owner Occupancy | Not required |
Additional Local Requirements for Salem
- ADU by right in residential zones (HB 2001)
- Minimum 200 sq ft
- System development charges apply
- One ADU per lot maximum
📥 Download the Complete Salem ADU Cheat Sheet
Get the step-by-step permit checklist, official government forms, direct planning department contacts, and estimated fees — all in one printable PDF for Salem, Oregon.
Download the Complete Salem ADU Cheat Sheet — $12Frequently Asked Questions About ADUs in Salem
Can I build an ADU in Salem?
Salem permits ADUs under Oregon's HB 2001 statewide mandate. The process is streamlined with minimal local restrictions.
What is the maximum ADU size allowed in Salem?
ADUs in Salem can be up to 1,200 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Salem planning department before designing your project.
What are the setback requirements for an ADU in Salem?
ADUs in Salem generally require setbacks of 5 ft rear, 5 ft side. Oregon's HB 2001 (2019) requires cities to allow ADUs in residential zones, but the exact setback figures come from Salem's own code — confirm them with the city before you design.
Disclaimer: This guide summarises publicly available city zoning rules and is for general information only — it is not legal or architectural advice. Codes change; always confirm current requirements with the Salem planning department before you design or build.