Oregon Statewide Rule

Oregon State Building Code and Setback Authority

Some RestrictionsApplies statewide across Oregon (2026)

Oregon's statewide building code under ORS 455.040 governs structural separation distances tied to fire safety, while zoning setbacks remain local. The Oregon Residential Specialty Code sets fire-rated wall requirements based on lot line proximity that no municipality may weaken.

Key Facts

Building code: ORS 455.040
Fire separation: 5 feet trigger
Zoning setbacks: Local control
Middle housing: HB 2001 (2019)

Source: Oregon Public Law

Full Breakdown

ORS 455.020 establishes a uniform state building code; ORS 455.040 makes it the maximum standard for structural matters. ORSC Table R302.1 requires fire-resistance-rated exterior walls when within 5 feet of a property line, with openings prohibited under 3 feet. Cities cannot allow lesser fire separation. However, zoning setbacks (front, side, rear yard distances) are explicitly local matters under Oregon's land use planning system (ORS 197). Statewide planning Goal 10 (Housing) and recent middle-housing laws (HB 2001, 2019) preempt some restrictive local setback rules in cities over 10,000 to allow duplexes and ADUs.

Violations & Penalties

Building code violations carry civil penalties up to $5,000 per day under ORS 455.895; LUBA appeals available for noncompliant local zoning.

Frequently Asked Questions

Does Oregon set minimum yard setbacks statewide?

No. Yard setbacks are local zoning matters under ORS 197. The state building code only mandates fire-resistance ratings for walls within 5 feet of a property line.

What is HB 2001's effect on setbacks?

HB 2001 (2019) requires cities over 10,000 population to allow duplexes on single-family lots and middle housing in larger cities, often forcing relaxation of restrictive setback and lot-size rules.

Sources

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