Part I: Washington State Building Codes Adopted

§ 14.80.010 Washington State Building Codes Adopted.

The below-listed model codes, as approved, adopted and amended by the State Building Code Council (SBCC) are hereby adopted by this reference. These codes shall apply to all new construction, remodeling, or repairs. Copies of the codes are on file in the office of the Building Official.

(a)

The 2021 Edition of the International Building Code (IBC) including Appendix E, and the adoption of ICC/ANSI A117.1-2017, Requirements for Accessible and Useable Buildings and Facilities, as adopted and amended by the State Building Code Council in Chapter 51-50 WAC, as published by the International Code Council with the following amendments and additions. The 2021 International Existing Building Code (IEBC) is included in the adoption of the International Building Code as provided by IBC Section 101.4.7 as adopted and amended by the State Building Code Council.

(1)

IBC Section 501.2 Amended – General Building Heights and Areas, General, Address Identification. Section 501.2 of the International Building Code is hereby amended to read as follows:

In addition to the requirements of IBC 501.2, address identification shall comply with Section 14.84.190 of the Lake Stevens Municipal Code.

Exception. Group R-3 occupancies, townhomes, and one & two family dwellings.

(2)

IBC Section 903 Addition. In addition to the requirements of IBC Section 903, automatic systems shall also comply with Section 14.84.150.

(b)

The 2021 Edition of the International Residential Code as published by the International Code Council with the following additions, deletions, and exceptions; provided, that Chapters 11 and 25 through 43 of this code are not adopted. Energy Code is regulated by Chapter 51-11R WAC; Plumbing Code is regulated by Chapter 51-56 WAC; Electrical Code is regulated by Chapter 296-46B WAC or Electrical Code as adopted by the local jurisdiction. Appendix F, Radon Control Methods, and Appendix Q, Tiny Homes, are included in adoption of the International Residential Code. The following additions are included in adoption of the International Residential Code:

(1)

IRC Section R105.2 Addition. In addition to the requirements of IRC Section R105.2, add exemption item 11. Light weight roof or reroof covering. Light weight roof covering includes composition, or metal roof covering and similar materials where the installed unit is less than four pounds per square foot.

(2)

IRC Section R105.2 Addition. In addition to the requirement of IRC Section R105.2, add exemption item 12. Removal and replacement of exterior windows in existing window openings. The size of opening may not be altered, and operable opening size may not be decreased.

(3)

IRC Table R301.2(1) Amended. International Residential Code Table R301.2(1) is hereby amended to read as follows:

Table R301.2(1) Climatic and Geographic Design Criteria
Ground Snow Load^o	Wind Design				Seismic Design Category^f	Subject to Damage From			Outdoor Design Temp^e(F) Heat/ Cool	Ice Barrier Underlayment Required^h	Flood Hazards^g	Air Freezing Indexⁱ	Mean Annual Temp^j
Ground Snow Load^o	Speed^d (mph)	Topographic effects^k	Special wind region^l	Wind-borne debris zone^m	Seismic Design Category^f	Weathering^a	Frost line depth^b	Termite^c	Outdoor Design Temp^e(F) Heat/ Cool	Ice Barrier Underlayment Required^h	Flood Hazards^g	Air Freezing Indexⁱ	Mean Annual Temp^j
25	110	No	No	No	D2	Moderate	12"	Slight to moderate	23/79	No	Per LSMC	175	50.5

Manual J Design Criteriaⁿ
Elevation	Latitude	Winter heating	Summer cooling	Altitude correction factor	Indoor design temperature	Design temperature cooling	Heating temperature difference
217	47°00' 54"	72° F max	75° F min	0.99	72° F	75° F	56° F

Cooling temperature difference	Wind velocity heating	Wind velocity cooling	Coincident wet bulb	Daily range	Winter humidity	Summer humidity
8° F	N.A.	N.A.	66	Medium	75%	68%

Notes:
For SI: 1 pound per square foot = 0.0479 kN/m, 1 mile = 1.609 km/h.
a. Weathering may require a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code. The weathering column shall be filled in with the weathering index (i.e., "negligible," "moderate" or "severe") for concrete as determined from the Weathering Probability Map [Figure R301.2(3)]. The grade of masonry units shall be determined from ASTM C 34, C 55, C 62, C 73, C 90, C 129, C 145, C 216 or C 652.
b. The frost line depth may require deeper footings than indicated in Figure R403.1(1). The City shall fill in the frost line depth column with the minimum depth of footing below finish grade.
c. The City shall fill in this part of the table to indicate the need for protection depending on whether there has been a history of local subterranean termite damage.
d. The City shall fill in this part of the table with the wind speed from the basic wind speed map [Figure R301.2(5)A]. Wind exposure category shall be determined on site-specific basis in accordance with Section R301.2.1.4.
e. The outdoor design temperature shall be selected from the Washington State Energy Code, Appendix C. Deviations from the Appendix C temperatures shall be permitted to reflect local climates or local weather experience as determined by the Building Official.
f. The City shall fill in this part of the table with the Seismic Design Category determined from Section R301.2.2.1.
g. The City shall fill in this part of the table with (a) the date of the city's entry into the National Flood Insurance Program (date of adoption of the first code or ordinance for management of flood hazard areas), (b) the date(s) of the currently effective FIRM and FBFM, or other flood hazard map adopted by the community, as may be amended.
h. In accordance with Sections R905.2.7.1, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 and R905.8.3.1, where there has been a history of local damage from the effects of ice damming, the City shall fill in this part of the table with "YES." Otherwise, the City shall fill in this part of the table with "NO."
i. The City shall fill in this part of the table with the 100-year return period air freezing index (BF-days) from Figure R403.3(2) or from the 100-year (99 percent) value on the National Climatic Data Center data table "Air Freezing Index-USA Method (Base 32° Fahrenheit)" at http://www.ncdc.noaa.gov/oa/fpsf/AFI-pubreturn.pdf.
j. The City shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data table "Air Freezing Index-USA Method (Base 32° Fahrenheit)" at http://www.ncdc.noaa.gov/oa/fpsf/AFI-pubreturn.pdf.
k. In accordance with Section R301.2.1.5, where there is local historic data documenting structural damage to buildings due to topographic wind speed-up effects, the City shall fill in this part of the table with "YES." Otherwise, the City shall indicate "NO" in this part of the table.
l. In accordance with Figure R301.2(4)A, where there is no local historical data documenting unusual wind conditions, the jurisdiction shall fill in this part of the table with "YES" and identify any specific requirements. Otherwise, the jurisdiction shall indicate "NO" in this part of the table.
m. In accordance with Section R301.2.1.2.1, the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate "NO" in this part of the table.
n. The jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J or established criteria determined by the jurisdiction.
o. The jurisdiction shall fill in this section of the table using the ground snow load in Figure R301.1(6).

(c)

2021 Edition of the Uniform Plumbing Code, including Appendices A, B and I, published by the International Association of Plumbing and Mechanical Officials, with additions, deletions and exceptions noted in Chapter 51-56 WAC; provided, that Chapters 12 and 15 of this code are not adopted; provided further, that those requirements relating to venting and combustion air of fuel-fired appliances as found in Chapter 5 and portions of the code addressing building sewers are not adopted (WAC 51-56-003).

(d)

2021 Edition of the International Mechanical Code published by the International Code Council, including 2021 International Fuel Gas Code, 2020 National Fire Protection Association (NFPA) 58 (Liquefied Petroleum Gas Code) and 2021 NFPA 54 (National Fuel Gas Code) with exceptions noted in WAC 51-52-003.

(e)

2021 International Energy Conservation Code of the State of Washington regulated by Chapters 51-11C and 51-11R WAC.

(f)

The 2021 Edition of the International Property Maintenance Code (IPMC), including Sections 107.4 and 107.6 (IPMC) as published by the International Code Council is adopted by reference with the following deletions, exceptions, and amendments. Provided, Sections 103.5, 106, 111, and 112 are not adopted. References in the IPMC to other codes not adopted by Section 14.80.010 shall be deemed to refer to the most closely corresponding adopted codes and sections.

(1)

IPMC Section 102.3 is hereby amended as follows:

Repairs, additions, or alterations to a structure, or changes of occupancy, shall be done in accordance with the procedures and provisions of the International Building Code, International Existing Building Code, Washington State Energy Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, International Residential Code, Uniform Plumbing Code, and NFPA 70. Nothing in this code shall be construed to cancel, modify, or set aside any provision of the International Zoning Code.

(2)

IPMC Section 103.5 Fees. This section is not adopted. Fees for civil code violations shall be assessed per Section 17.20.040(b) or resolution set by City Council.

(3)

IPMC Section 106 Violations. This section is not adopted. Violations and penalties shall be as set forth in Chapter 17.20.

(4)

IMPC Section 107. Notices and Orders. This section shall only retain the provisions of Section 107.4 Unauthorized Tampering and Section 107.6 Transfer of Ownership. Any other sections of 107 are not adopted. Violations and penalties shall be as set forth in Chapter 17.20.

(5)

IPMC Section 111 Means of Appeal. This section is not adopted. Appeals shall be per Chapter 17.20.

(6)

IPMC Section 112 Stop Work Orders. This section is not adopted. Stop work orders shall be per Section 17.20.040.

(g)

The 2021 International Swimming Pool and Spa Code (ISPSC) is included in the adoption of the International Building Code as provided by IBC Section 3109.1 and amended in WAC 51-50-3109, and as provided by IRC Section R328 and amended in WAC 51-51-0328.

(h)

The 2021 International Wildland-Urban Interface Code (WUI) as published by the International Code Council adopted and amended by the State Building Code Council in Chapter 51-55 WAC; provided, that it includes adoption of Appendix B as Chapter 7, Appendix C as Chapter 8, Appendix D as Chapter 9 and re-numbers referenced standard as Chapter 10.

Exception: If State Building Code Council votes to change or not adopt and or delay the implementation of 2021 WUI code or portion thereof then delay, not adopt and/or delay implementation in accordance with State Building Code Council.

(Ord. 746, Sec. 7, 2007; Ord. 778, Sec. 2, 2008; Ord. 833, Sec. 2 (Exh. A), 2010; Ord. 897, Sec. 2 (Exh. A), 2013; Ord. 972, Sec. 2 (Exh. A), 2017; Ord. 1109, Sec. 2 (Exh. 1), 2021; Ord. 1136, Sec. 1, 2022; Ord. 1160, Sec. 2 (Exh. 1), 2024)