Updated : 04/22/2024

Overview

Spokane County, WA adopts the 2018 International Residential Code (IRC), including Appendix G, with amendments. Spokane County, WA, Muni. Code § 3.01.030 (adoption) and §§ 3.04.010-3.04.020 (amendments). Spokane County, WA adopts the 2018 International Building Code, including Appendices C and I, with amendments. Spokane County, WA, Muni. Code § 3.01.030 (adoption) and §§ 3.03.010-3.03.040 (amendments). Spokane County, Washington, adopted and amended the 2015 IEBC, according to Sec. 101.4.7  of the 2018 IBC and Wash. Admin. Code 51-50-007 (IEBC adoption). Wash. Admin. Code 51-50-480101 (IEBC general).

Spokane County, WA adopts the Washington State Building Code (WSBC) (based upon the ICC body of codes). Wash. Rev. Code Ann. § 19.27.031 (state codes) and Spokane County, WA Muni. Code § 3.01.030 (adoption). Note that the above codes are the current effective codes until March 15, 2024, when the 2021 edition will become effective. See PLRB, Washington Building Codes. 

Helpful resources for Spokane County, Washington include the following.

• PLRB, Ordinance and Law Coverage Discussion for Washington

Residential Building Code

Washington adopted a statewide mandatory residential code that will control; however, local governments are free to make laws more strict (with some limitations).See PLRB, Washington Building Codes for more information on state level codes.

Spokane County adopted the 2018 IRC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the model code here.

You can find information about amendments to the model code here.

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2021 Washington State Residential Code (2021 IRC)(Spokane County, WA 11.10.230 - Adoption by reference.)

...27. Spokane County Erosion and Sediment Control Ordinance; 28. RCW chapter 19.27, State Building Code, as locally amended, adopted, administered and enforced; 29. RCW chapter 76.09, 34.05, 43.21C.037, Forest...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Spokane County ? Yes
Citation: Spokane County, WA Muni. Code § 3.02.030
Municipal Code https://library.municode.com/wa/spokane_county/codes/code_of_ordinances?nodeId=TIT3BUST_CH3.02ORENGERE_3.02.030DELO
Comments:

The adoption of the residential code included an amendment stating that ice barrier underlayment is required at the eaves.

Ground Snow Load	Wind Speed (Gust)	Seismic Design Category	Weathering	Frost Line Dept	Termites	Decay	Winter Design Temp	Ice Shield Underlay	Flood Hazards	Air Freeze Index	Mean Annual Temp
39 lbs/ft 2 (b)	85 mph 70 fastest	ISO 33 C*	Severe	24″	Slight	None to Slight	10° F	Yes	1612.3 IBC FEMA Map Res. 03-0800(c)	1232	47.2° F

Spokane County, WA Muni. Code § 3.02.030 (amendments). 

 

Comments

Spokane County, WA adopts the 2018 International Residential Code (IRC), including Appendix G, with amendments. Spokane County, WA, Muni. Code § 3.01.030 (adoption) and §§ 3.04.010-3.04.020 (amendments). 

Spokane County, WA adopts the Washington State Building Code (WSBC) (based upon the ICC body of codes). Wash. Rev. Code Ann. § 19.27.031 (state codes) and Spokane County, WA Muni. Code § 3.01.030 (adoption). Note that the above codes are the current effective codes until March 15, 2024, when the 2021 edition will become effective. See PLRB, Washington Building Codes. 

Existing Buildings

Existing buildings, meaning buildings that were built in accordance to code at the time of construction, typically merit extra consideration in a current updated code.

The Washington State Building Code does NOT adopt IRC Appendix J (which provides guidance on existing buildings) as part of the code.

Spokane County, Washington, adopted and amended the 2015 IEBC, according to Sec. 101.4.7  of the 2018 IBC and Wash. Admin. Code 51-50-007 (IEBC adoption). Wash. Admin. Code 51-50-480101 (IEBC general).  

Spokane County, WA adopts the Washington State Building Code (WSBC) (based upon the ICC body of codes). Wash. Rev. Code Ann. § 19.27.031 (state codes) and Spokane County, WA Muni. Code § 3.01.030 (adoption). Note that the above codes are the current effective codes until March 15, 2024, when the 2021 edition will become effective. See PLRB, Washington Building Codes. 

Commercial Building Code

Spokane County adopted the 2018 IBC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the code here.You can find information about amendments to the model code here.

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2021 Washington State Building Code (2021 IBC)(Spokane County, WA Municipal Code)

...Adoption not found...

Comments

 Spokane County, WA adopts the 2018 International Building Code, including Appendices C and I, with amendments. Spokane County, WA, Muni. Code § 3.01.030 (adoption) and §§ 3.03.010-3.03.040 (amendments). 

Spokane County, WA adopts the Washington State Building Code (WSBC) (based upon the ICC body of codes). Wash. Rev. Code Ann. § 19.27.031 (state codes) and Spokane County, WA Muni. Code § 3.01.030 (adoption). Note that the above codes are the current effective codes until March 15, 2024, when the 2021 edition will become effective. See PLRB, Washington Building Codes. 

Existing Buildings

Spokane County, Washington, adopted and amended the 2015 IEBC, according to Sec. 101.4.7  of the 2018 IBC and Wash. Admin. Code 51-50-007 (IEBC adoption). Wash. Admin. Code 51-50-480101 (IEBC general).  

Spokane County, WA adopts the Washington State Building Code (WSBC) (based upon the ICC body of codes). Wash. Rev. Code Ann. § 19.27.031 (state codes) and Spokane County, WA Muni. Code § 3.01.030 (adoption). Note that the above codes are the current effective codes until March 15, 2024, when the 2021 edition will become effective. See PLRB, Washington Building Codes. 

Other Building Codes