Kirkland vs Renton
How do erosion control rules compare between Kirkland, WA and Renton, WA?
Kirkland and Renton have similar restriction levels.
Kirkland, WA
King County
Kirkland requires temporary erosion and sediment control (TESC) plans for clearing and grading per KMC Chapter 115 and the Ecology stormwater manual, with wet-season rules limiting soil disturbance from October to April.
View full Kirkland rules →Renton, WA
King County
Renton requires Temporary Erosion and Sediment Control plans on sites disturbing 7,000 square feet or more. Silt fences, wattles, and stabilized entrances are required per the King County SWDM.
View full Renton rules →Key Facts Comparison
| Fact | Kirkland | Renton |
|---|---|---|
| Code | KMC 115 + Ecology Manual | - |
| TESC Threshold | 7,000 sq ft typical | - |
| Wet Season | Oct 1 to Apr 30 | - |
| Stabilization | Required after grading pause | - |
| Discharge | Muddy water prohibited | - |
| TESC threshold | - | 7,000 sq ft disturbance |
| Required BMPs | - | Silt fence, wattles, entrance, inlet protection |
| Wet season | - | Oct 1 to Apr 30 tighter controls |
| State permit | - | Ecology CSWGP for 1+ acre sites |
| Salmon habitat | - | Cedar River sediment discharge serious |
Highlighted rows indicate differences between cities.
Kirkland FAQ
Do I need a TESC plan for a small landscaping project?
Most small residential landscape projects fall below thresholds, but any work on steep slopes, near streams, or over 7,000 square feet generally requires a TESC plan.
Can I continue excavation in November?
Wet-season rules reduce the allowable exposed area and add stabilization deadlines. Projects must plan for rapid covers, mats, or seeding between grading phases.
Renton FAQ
Does a small yard project need erosion control?
Yes if disturbance exceeds 7,000 sq ft. Even smaller projects should use basic BMPs like silt fences to prevent sediment from leaving the site.
Who inspects erosion control on construction sites?
Renton Public Works and CED inspectors verify TESC installation during construction, and Ecology oversees the state construction stormwater permit for larger sites.
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