Clackamas County, OR Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Urban low-density (R-2.5 to R-30)
- 50 percent
- Planned unit development
- 65 percent
- Village standard lots
- 50 percent
- Middle-housing lots
- Measured on parent lot
- Relief
- Variance (ZDO 1205)
Summary
In the urban low-density residential districts (R-2.5 to R-30), the ZDO limits maximum lot coverage to 50 percent. In a planned unit development, maximum lot coverage rises to 65 percent.
Maximum Lot Coverage: 50 percent. [Footnote:] Maximum lot coverage in a planned unit development is 65 percent.
Full Breakdown
Lot coverage, the share of a lot buildings may cover, is set per district in the ZDO. In the urban low-density residential zoning districts (R-2.5 through R-30), maximum lot coverage is 50 percent. Village small-lot and townhouse districts also cap coverage at 50 percent, rising to 65 percent in some higher-density configurations. In a planned unit development, maximum lot coverage is 65 percent. For middle-housing lots, coverage is calculated across the entire parent lot. Confirm your specific district and any overlay with county Planning.
Violations & Fines
Exceeding the maximum lot coverage is a ZDO violation that can stop a building permit; relief requires a variance under ZDO Section 1205 or redesign to reduce covered area.
Frequently Asked Questions
How much of my lot can I build on?
Does a PUD change the limit?
Sources & Official References
Other rules in Clackamas County
Compare Clackamas County to another location·View the Oregon building setbacks & zoning overview
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