Log in to Project Portal

Energy Code

See also: 

What Is It?

Our Seattle Energy Code regulates the energy-use features of new and remodeled buildings, including:

  • Building Envelope: requirements for roofs, walls, window,s etc. to control heat loss and air leakage 
  • Heating, Ventilation and Air Conditioning (HVAC): efficiency for heating and cooling equipment
  • Water Heating: equipment efficiency and controls
  • Lighting: number and type of lighting fixtures and controls
  • Metering, plug load controls, transformers, motors, and renewable energy

Read the Code

 

2015 Seattle Energy Code

Previous Versions

2009 Code

2012 Code

This is a read-only version of the 2012 Seattle Energy Code. You can buy a full version from iccsafe.org.

Seattle Energy Code - Commercial 

 Seattle Energy Code - Residential

Washington State Appendices

Purchase Codes

Residential or Commercial Energy Code?

The Seattle Energy Code chapters that apply to your project depend on whether your project is a "residential building" or a "commercial building" as defined in the energy code. See below for a breakout of the chapters by each version of the code.

  • Use the “residential buildings” provisions for single-family homes, duplexes, and townhouses
  • Use the “residential buildings” provisions for 1-, 2-, and 3-story multifamily buildings
  • Use the “commercial buildings” provisions for 4-story and higher multifamily buildings
  • Use the “commercial buildings” provisions for non-residential buildings

Addition, Alteration, & Repair Projects

2015 Code

  • Use the new Chapter 5 in the “residential building” portion of the code for single-family homes, duplexes, and townhouses, and for 1-, 2- and 3-story multifamily buildings
  • Use the new Chapter 5 in the “commercial building” portion of the code or non-residential and for 4-story and higher multifamily buildings

2012 Code

  • Use “residential building” code sections R101.4.1 through R101.4.5 for single-family homes, duplexes, and townhouses, and for 1-, 2- and 3-story multifamily buildings
  • Use “commercial building” code sections C101.4.1 through C101.4.5 for non-residential and for 4-story and higher multifamily buildings

Recent Changes

As of January 1, 2017, you must design your Seattle projects using the 2015 Seattle Energy Code. We expect electronic versions of the codes will be available on our web site, and print versions available through our Public Resource Center, by February 28, 2017.

What Do You Want To Do?


Still Need Help?


 Ask Us

  • Call us at (206) 684-8850

 Online