Thurston County Building Codes

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This information is also referenced in our Step by Step Guide for Homeowners

Washington State Energy Code

The Washington State Energy Code is a state-written, state-specific code. Thurston County will enforce the 2018 Washington Energy Code after February 1, 2021. See our 2018 Energy Code update at:2018 Residential Energy Code Update.pdf (thurston.wa.us)

For Information on the 2015 Washington Energy Code please visit:
http://www.energy.wsu.edu/BuildingEfficiency/EnergyCode/2015EnergyCode.aspx

Please click here for contact information.

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