Clark County, WA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Rural coverage
- N/A (no percentage cap)
- Controlled by
- Lot size and setbacks
- Min lot area
- 20/10/5 acres (R-20/10/5)
- Urban zones
- Own coverage limits apply
- Stormwater
- Chapter 40.386 impervious rules
Summary
Clark County's rural residential districts (R-20, R-10, R-5) set no numeric maximum lot coverage in Table 40.210.020-3 (listed as N/A). Coverage is effectively controlled by large minimum lot sizes and the required setbacks. Urban zones have their own coverage limits.
Maximum Lot Coverage: N/A [for R-20, R-10, R-5].
Full Breakdown
In Table 40.210.020-3 of Clark County Code 40.210.020, the Maximum Lot Coverage column for the rural R-20, R-10, and R-5 districts is listed as N/A, meaning the rural districts rely on very large minimum lot areas (20, 10, and 5 acres respectively) and the 50/25/20-foot setbacks rather than a percentage cap. Urban low-density residential zones in CCC Chapter 40.220 and cluster-development standards (Table 40.210.020-5) do apply specific coverage and dimensional limits. Impervious-surface and stormwater standards under CCC Chapter 40.386 can further constrain how much of a lot may be developed.
Violations & Fines
Where a coverage or impervious-surface limit applies, exceeding it can block permit approval and require redesign or stormwater mitigation.
Frequently Asked Questions
Is there a lot-coverage percentage in rural Clark County?
What limits how much I can build on my lot?
Sources & Official References
Other rules in Clark County
Compare Clark County to another location·View the Washington building setbacks & zoning overview
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