Are you ready for the 2016 Stormwater Code?

The 2016 Stormwater Code became effective on January 1, 2016. The City of Seattle is offering a series of free training sessions to assist builders and designers with implementing the 2016 Stormwater Code. Be sure to register soon because classes are filling up quickly!

The training sessions will cover:

  • What’s new?
  • What’s changed?
  • The Stormwater manual
  • Infiltration Requirements
  • On-Site Stormwater Management and the Calculator
  • Question and answer session


Email to register for one of the following FREE training sessions (space is limited):

  • Wednesday, January 6
    8:00 – 9:30 a.m.
  • Thursday, January 7
    2:30 – 4:00 p.m.
  • Wednesday, January 20
    8:00 – 9:30 a.m.
  • Thursday, January 21
    2:30 – 4:00 p.m.

The 2016 Stormwater Code, the Stormwater Manual, and the associated submittal documents are now available on the Stormwater Code Page. Our new rules will replace the current Stormwater Code and Directors’ Rules, which are administered jointly by us and Seattle Public Utilities (SPU).

Which Version Applies to My Project?

If your project application is submitted on, or after, January 1, 2016, you must comply with the 2016 Stormwater Code and Manual.

If we accepted your project plans and documentation for permit review prior to January 1, 2016, you may use the 2009 Stormwater Code and Manual.

For more information about the 2016 Stormwater code, visit our website or email