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
2012 Seattle Energy 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
Residential versus commercial. 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 this version for permit applications dated December 27, 2013 or later.)
- 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
(Use this version for permit applications dated before December 27, 2013.)
- Chapters 1-10: Single-family homes, duplexes, and townhouses
- Chapters 11-15: Multifamily buildings, without Seattle amendments
- Chapters 11-16: Non-residential buildings, with Seattle amendments
- Chapters 2 (definitions), 7 (design temps) and 10 (U-values) apply to all projects
- 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
- Use section 101.3.2 for single-family homes, duplexes, and townhouses
- Use section 1130 for multifamily buildings, without Seattle amendments
- Use Section 1130 for non-residential buildings, with Seattle amendments
As of January 1, 2017, you must design your Seattle projects using the 2015 Seattle Building Code. You can choose whether to submit your project using either the 2012 codes or the 2015 codes between November 6 and December 31, 2016.