Stormwater Management: Auburn vs Redmond
How do stormwater management rules compare between Auburn, WA and Redmond, WA?
Auburn and Redmond have similar restriction levels.
Auburn, WA
King County
Auburn follows the Department of Ecology Western Washington Stormwater Manual through ACC Title 13 surface water code, requiring runoff control for new and redeveloped sites in the Green River watershed.
View full Auburn rules →Redmond, WA
King County
Redmond is an NPDES Phase II city and enforces Department of Ecology stormwater standards. Development over 2,000 sf of new or replaced impervious surface must mitigate runoff.
View full Redmond rules →Key Facts Comparison
| Fact | Auburn | Redmond |
|---|---|---|
| Code | ACC 13 + Title 17 | - |
| Manual | Ecology Western WA Stormwater | DOE 2019 Western WA |
| Trigger | 2,000 sq ft impervious | 2,000 sf new impervious |
| LID Required | Where feasible | - |
| Hotline | (253) 931-3048 | - |
| Permit | - | NPDES Phase II |
| Salmon basins | - | Bear Creek, Sammamish River |
Highlighted rows indicate differences between cities.
Auburn FAQ
Do I need stormwater review for a new driveway?
Replacing or expanding impervious surface over the code threshold triggers Auburn stormwater minimum requirements and often a simplified small-parcel plan set.
Can I wash my car in the driveway?
Occasional residential car washing is allowed, but soapy runoff should be directed to landscaped areas. Commercial washing and fundraisers must use approved capture kits.
Redmond FAQ
Do I need a stormwater plan for a Redmond remodel?
Yes if the project creates or replaces more than 2,000 sf of impervious surface, with smaller projects requiring a basic form.
Can I wash my car at home in Redmond?
Private residential car washing is allowed; commercial washing that drains into a storm drain is an illicit discharge and is prohibited.
Compare other topics
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