Kirkland vs Seattle
How do stormwater management rules compare between Kirkland, WA and Seattle, WA?
Kirkland and Seattle have similar restriction levels.
Kirkland, WA
King County
Kirkland follows the Department of Ecology Western Washington Stormwater Manual through KMC Chapter 15 and 115 surface water code, requiring runoff control for new and redeveloped sites.
View full Kirkland rules →Seattle, WA
King County
Seattle enforces comprehensive stormwater management under SMC Title 22 Subtitle VIII, requiring drainage control plans for all development and redevelopment to protect Puget Sound water quality.
View full Seattle rules →Key Facts Comparison
| Fact | Kirkland | Seattle |
|---|---|---|
| Code | KMC 15 + Title 115 | - |
| Manual | Ecology Western WA Stormwater | - |
| Trigger | 2,000 sq ft impervious | - |
| LID Required | Where feasible | - |
| Hotline | (425) 587-3800 | - |
| Governing Code | - | SMC Title 22, Subtitle VIII – Stormwater Code |
| Trigger Threshold | - | 750 sq ft of new or replaced impervious surface |
| Oversight Agency | - | Seattle Department of Construction and Inspections (SDCI) |
| Fee Structure | - | Drainage utility fee based on impervious surface area |
| Design Standard | - | Seattle Stormwater Manual with on-site BMP requirements |
Highlighted rows indicate differences between cities.
Kirkland FAQ
Do I need stormwater review for a new driveway?
Replacing or expanding impervious surface over the code threshold triggers Kirkland 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.
Seattle FAQ
Do homeowners pay stormwater fees in Seattle?
Yes, Seattle Public Utilities charges a drainage fee to all developed properties based on the amount of impervious surface. Residential properties pay a flat rate per parcel while commercial properties are charged based on measured impervious area. Credits are available for installing approved on-site stormwater management facilities like rain gardens.
When is a drainage control plan required?
A drainage control plan reviewed by SDCI is required for any project that adds or replaces 750 square feet or more of impervious surface, or that involves land-disturbing activity. This includes new construction, additions, and significant remodels.
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