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Sammamish Town Center (not licensed)

Stormwater Utility

Sr. Stormwater Program Manager

Stephanie Sullivan
(425) 295 0560

2023 Stormwater Utility Rate Fee

Please see the 2023 Stormwater Rate Fee notice letter here.

The goal of the City’s Surface and Stormwater Program is to protect and restore our local water resources by ensuring a high-performance level from current and future stormwater systems. This can reduce flooding and prevent polluted runoff from reaching our streams, rivers, wetlands, and Puget Sound.

Without regular maintenance and inspection, your system can become compromised. This can allow water to directly discharge into local streams without sediment and pollution control. An unmaintained system could cause flooding on your property and those around you, resulting in costly damage or loss.

Do you manage a privately-owned stormwater system? Please register your contact information here!

Stormwater Utility Rate Study

A new utility fee was adopted with the 2023 Fee Schedule on November 2nd, 2022. Please refer to the fee schedule for current rates. An enhanced level of service was adopted by City Council on October 18, 2022.  Please check the City Council calendar for more details.

Stormwater Utility Rates And System Development Charges

2023 Stormwater Rates
  Rate Unit
Residential $420.75  
Non-Residential $420.75 Per equivalent service unit (ESU)*

*One equivalent service unit (ESU) is equal to 3,500 square feet of impervious surface.

Surface Water Development Charge (Per SMC 21.03.050)
New residential dwelling unit or commercial building with up to 2,500 square feet of impervious coverage $2,085.00
Each additional 250 square feet of impervious coverage over 2,500 square feet $208.50
Other structures or additions of up to 250 square feet of impervious coverage requiring a building permit $208.50 + $208.50 for each additional 250 square feet
Surface Water Retention Locks $32.00 plus tax