The Storm & Surface Water Division is funded by the Surface Water Management Fee charged to property owners. This fee appears on the property tax statements of developed parcels in Kirkland. The fee funds activities required under the City's Municipal Stormwater Permit. Activities include water quality monitoring, pollution prevention, and the maintenance of Kirkland’s stormwater system.
Surface water utility rates are based on “Equivalent Service Units” (ESUs). One ESU is equal to approximately 2,600 square feet. This is the average impervious area on a single-family parcel in Kirkland.
The surface water utility rate is $19.75/month per “Equivalent Service Unit” (ESU).
Single Family Residence Fee Structure
Single-family residential properties are charged a flat rate per year for one ESU.
Surface Water Management Fee = $19.75/month (flat rate) plus 7.5% utility tax = $254.78/year.
Commercial and Multi-Family Property Fee Structure
Commercial properties are assessed a charge based on the actual amount of impervious surface area they contain (buildings, parking lots, etc.).
$19.75/month per “Equivalent Service Unit” (ESU). One ESU is equal to 2,600 square feet (ft2) of impervious surface.
Surface Water Management Fee = # ESU x $19.75/month plus 7.5% utility tax
An apartment complex has 10,000 ft2 of impervious surface (parking lots, walkways, rooftops, etc.). The surface water management fee would be:
10,000 ft2 /2600 ft2 = 3.85 ESU
3.85 ESU X $19.75 per month per ESU = $76.04 per month + 7.5% utility tax = $980.89/year
Drainage fees do not appear on your Kirkland utility bill but are collected with your King County property taxes. The fee is shown on your tax bill as SWM (Surface Water Management) or Drainage. You can view your drainage fee by entering your property tax ID in the King County Property Tax Information System.