Retaining Walls: Bellevue vs Kent
How do retaining walls rules compare between Bellevue, WA and Kent, WA?
Kent has fewer restrictions than Bellevue.
Bellevue, WA
King County
Bellevue requires building permits for retaining walls over 4 feet measured from bottom of footing; walls in critical areas need geotechnical review regardless of height.
View full Bellevue rules →Kent, WA
King County
Kent requires a building permit for retaining walls over 4 feet tall measured from footing to top. Walls supporting surcharges or on geologically hazardous slopes need a permit at any height under WAC 51-16.
View full Kent rules →Key Facts Comparison
| Fact | Bellevue | Kent |
|---|---|---|
| - | - | |
| No Permit | - | Under 4 feet unsurcharged |
| Permit Needed | - | Over 4 feet or surcharge |
| Critical Areas | - | Always permit needed |
| Code | - | WAC 51-16-080 / KCC 11.06 |
Highlighted rows indicate differences between cities.
Bellevue FAQ
Kent FAQ
Do I need a permit for a retaining wall in Kent?
Only if the wall exceeds 4 feet from footing to top, supports a surcharge, or sits in a critical area under KCC 11.06.
Is a rockery considered a retaining wall in Kent?
Yes. Kent treats dry-stack rockeries under the same 4-foot height threshold as engineered retaining walls.
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