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

2015 Seattle Energy Code Development

Seattle DCI will hold a series of public meetings during January and February to review proposed changes to the “Commercial Buildings” provisions of the 2015 Seattle Energy Code. (The City does not amend the residential portion of the code.) We will post the proposals that are scheduled for discussion in advance of each meeting. To submit your own code change proposals, or to be notified of the upcoming meetings, please send your name and email address to:

Seattle’s Climate Action Plan requires significant improvements in energy efficiency for both new construction and existing buildings, so ideas for cost-effective code changes that would reduce building energy use are encouraged.

For more information, contact:

Duane Jonlin
Energy Code and Energy Conservation Advisor
Seattle Department of Planning and Development
(206) 233-2781