Lynnwood, Washington Building Codes

Updated : 04/22/2024

Overview

Lynnwood, Washington, adopted the 2018 International Residential Code with amendments. Lynnwood, WA, Muni. Code §16.09.10 (adoption), §16.09.50, §16.09.70, and §16.09.100 (amendments). Note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes. Lynnwood, Washington, adopted the 2018 International Building Code, including Appendices E, G, and J, with amendments. Lynnwood, WA, Muni. Code §16.04.010 (adoption), §16.04.035, and §16.04.100 (amendments). Note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes. Lynnwood, Washington, adopted the 2015 International Existing Building Code. See PLRBWashington Building Codes, and Lynnwood, WA, “Adopted Codes.” City of Lynnwood Design Guidelines & Plans. Accessed October 16, 2023. https://www.lynnwoodwa.gov/Services/Apply-for-a-Permit/Adopted-Codes-City-Design-Guidelines-PlansNote that no local adoption could be found in the municipal code and the "adopted code" section of the city website shows the 2018 Washington Existing Building Code; however, Washington adopted the 2015 edition of the IEBC by amending section 101.4.7 of the 2018 IBC as a statewide code. 

Also, note that the 2015 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes.

Helpful resources for Lynnwood, Washington include the following.

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.

Lynnwood 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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2018 Washington State Residential Code (2018 IRC)(City of Lynnwood, WA Municipal Code)

...Adoption not found...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Lynnwood ? No
Comments:

The adoption of the residential code included an amendment stating that ice barrier underlayment is not required at the eaves.

Table R301.2(1). Climatic and Geographic Design Criteria

GROUND SNOW LOAD

25

WIND DESIGN

Speedd (mph)

110

Topographic effectsk

NO

Special wind regionl

NO

Wind-borne debris zonem

NO

SEISMIC DESIGN CATEGORYf

D2

SUBJECT TO DAMAGE FROM

Weatheringa

MODERATE

Frost line depthb

18"

Termitec

SLIGHT

WINTER DESIGN TEMPe

22

ICE BARRIER UNDERLAYMENT REQUIREDh

NO

FLOOD HAZARDg

1985; 2005; 53061C1305E 53061C1310E 53061C1309E 53061C1320E 53061C1315E All adopted 11/08/1999

AIR FREEZING INDEXi

1500

MEAN ANNUAL TEMPj

52.8

Lynnwood, WA, Muni. Code §16.09.100.

 

Comments

Lynnwood, Washington, adopted the 2018 International Residential Code with amendments. Lynnwood, WA, Muni. Code §16.09.10 (adoption), §16.09.50§16.09.70, and §16.09.100 (amendments). Note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington 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.

No adoption of Appendix J was found in the municipal code. 

Lynnwood, Washington, adopted the 2015 International Existing Building Code. See PLRBWashington Building Codes, and Lynnwood, WA, “Adopted Codes.” City of Lynnwood Design Guidelines & Plans. Accessed October 16, 2023. https://www.lynnwoodwa.gov/Services/Apply-for-a-Permit/Adopted-Codes-City-Design-Guidelines-PlansNote that no local adoption could be found in the municipal code and the "adopted code" section of the city website shows the 2018 Washington Existing Building Code; however, Washington adopted the 2015 edition of the IEBC by amending section 101.4.7 of the 2018 IBC as a statewide code. 

Also, note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes.

Commercial Building Code

Lynnwood 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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2018 Washington State Building Code (2018 IBC)(City of Lynnwood, WA Municipal Code)

...Adoption not found...

Comments

Lynnwood, Washington, adopted the 2018 International Building Code, including Appendices E, G, and J, with amendments. Lynnwood, WA, Muni. Code §16.04.010 (adoption), §16.04.035, and §16.04.100 (amendments). Note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes.

Existing Buildings

Lynnwood, Washington, adopted the 2015 International Existing Building Code. See PLRBWashington Building Codes, and Lynnwood, WA, “Adopted Codes.” City of Lynnwood Design Guidelines & Plans. Accessed October 16, 2023. https://www.lynnwoodwa.gov/Services/Apply-for-a-Permit/Adopted-Codes-City-Design-Guidelines-PlansNote that no local adoption could be found in the municipal code and the "adopted code" section of the city website shows the 2018 Washington Existing Building Code; however, Washington adopted the 2015 edition of the IEBC by amending section 101.4.7 of the 2018 IBC as a statewide code. 

Also, note that the 2015 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes.

Other Building Codes

Lynnwood, Washington, adopted the 2018 International Fire Code, including Appendix B, C, D, H, I, and N, with amendments. Lynnwood, WA, Muni. Code §9.01.030 (adoption), §9.01.031 (appendices), and §9.04 (amendments).

Lynnwood, Washington, adopted the 2018 Uniform Plumbing Code with amendments. Lynnwood, WA, Muni. Code §15.04.010 (adoption) and §§15.04.40-15.04.55 (amendments).

Lynnwood, Washington, adopted the 2018 International Mechanical Code with amendments. Lynnwood, WA, Muni. Code §15.08.010 (adoption), §15.08.030 and §15.08.050 (amendments). 

Lynnwood, Washington, adopted the 2018 International Energy Conservation Code. Lynnwood, WA, Muni. Code §16.05.010 (adoption) and §16.05.015 (amendments).

Lynnwood, Washington, adopted the 2020 National Electric Code (NFPA 70), including Appendix A, B, and C. Lynnwood, WA, Muni. Code §16.10.050 (adoption) and §§16.10.090-16.10.130 (amendments).

Lynnwood, Washington, adopted the 2018 International Swimming Pool and Spa Code. Lynnwood, WA, Muni. Code §16.24.010 (adoption), §16.24.030§16.24.055, and §16.24.080 (amendments). 

Lynnwood, Washington, adopted the 2018 International Property Maintenance Code. Lynnwood, WA, Muni. Code §16.44.010 (adoption) and §16.44.030 (amendments).

Lynnwood, Washington, adopted the 2009 ICC/ANSI A117.1 Accessible and Usable Buildings and Facilities design standard. Note that the Lynnwood municipal code does not show this code; however, Washington adopted this code as a part of the Washington State Building Codes and it is included in the "adopted code" section on the city website. See PLRBWashington Building Codes, and Lynnwood, WA, “Adopted Codes.” City of Lynnwood Design Guidelines & Plans. Accessed October 16, 2023. https://www.lynnwoodwa.gov/Services/Apply-for-a-Permit/Adopted-Codes-City-Design-Guidelines-Plans.

Lynnwood, Washington, adopted the 2018 Fuel Gas Code. Note that the Lynnwood municipal code does not show this code; however, Washington adopted this code as a part of the Washington State Building Codes and it is included in the "adopted code" section on the city website. See PLRBWashington Building Codes, and Lynnwood, WA, “Adopted Codes.” City of Lynnwood Design Guidelines & Plans. Accessed October 16, 2023. https://www.lynnwoodwa.gov/Services/Apply-for-a-Permit/Adopted-Codes-City-Design-Guidelines-Plans.

Note that the 2018 edition is the current effective code until March 15, 2024, when the 2021 edition will become effective. See PLRBWashington Building Codes.