Updated : 04/22/2024

Overview

Westminster, CO adopts the following codes:

• The International Building Code, 2015 edition, Chapters 2 through 35 inclusive and Appendix Chapter I. Westminster, CO Muni. Code § 11-9-5 (amendments).
• The International Residential Code, 2015 edition, Chapters 2 through 44 inclusive and Appendix Chapters A, H, and K. Westminster, CO Muni. Code § 11-9-6 (amendments).
• The International Existing Building Code, 2015 edition, Chapters 2 through 16 inclusive. Westminster, CO Muni. Code § 11-9-13 (amendments).

Westminster, CO Muni. Code § 11-9-1 (adopted).

Helpful resources for Westminster, Colorado include the following.

• PLRB, Ordinance and Law Coverage Discussion for Colorado

Residential Building Code

Colorado has yet to adopt a statewide residential code. Local laws will control.See PLRB, Colorado Building Codes for more information on state level codes.

Westminster adopted the 2015 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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See Muni. Code(Westminster, CO 11-9-6. - International Residential Code Amendments.)

...Table R302.1(1) of the International Residential Code is amended to read as follows: Footnote b. Delete in its entirety (D) Table R302.1(2) of the International Residential Code is amended to read as follows:...

Drip Edge

Drip Edge: yes

Ice Barrier

Are ice barriers required for Westminster ? No
Citation: Westminster, CO Muni. Code § 11-9-6.
Municipal Code https://library.municode.com/co/westminster/codes/code_of_ordinances?nodeId=CD_ORD_TITXILADEGRPR_CH9BUCO_11-9-6INRECOAM
Comments:

Table R301.2(1) of the International Residential Code is amended to read:

TABLE R301.2(1) CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
GROUND SNOW LOAD		WIND DESIGN				SEISMIC DESIGN CATEGORY	SUBJECT TO DAMAGE FROM					WINTER DESIGN TEMP	ICE BARRIER UNDERLAYMENT REQUIRED	FLOOD HAZARD	AIR FREEZING INDEX	MEAN ANNUAL TEMP	ACCUM SNOW LEVEL
		Speed (mph)	Topographic effects	Special wind region	Wind borne debris zone		Weathering	Frost line depth	Termite
30		130—155	B	Yes	No	B	Severe	36"	Slight to Moderate			1°F	No	N/A	532	51.0	12"

Comments

Westminster, CO adopts the International Residential Code, 2015 edition, Chapters 2 through 44 inclusive and Appendix Chapters A, H, and K. Westminster, CO Muni. Code § 11-9-1(B)(2) (adopted) with amendments at § 11-9-6.

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.

There is no mention of the adoption of Appendix J of the 2015 IRC.

Commercial Building Code

Westminster adopted the 2015 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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2015 IBC(Westminster, CO 11-9-1. - Adoption of Building Codes.)

...International Building Code. The "International Building Code, 2015 Edition," published by the International Code Council, Inc., and in particular Chapters 2 through 35 inclusive and Appendix Chapter I are hereby adopted as the Building Code of and for the City. The International Building Code shall apply to the construction...

Comments

Westminster, CO adopts the International Building Code, 2015 edition, Chapters 2 through 35 inclusive, and Appendix Chapter I. Westminster, CO Muni. Code § 11-9-1(B)(1) (adopted) with amendments at § 11-9-5.

Existing Buildings

Westminster, CO adopts the International Existing Building Code, 2015 edition, Chapters 2 through 16 inclusive. Westminster, CO Muni. Code § 11-9-1(B)(9) (adopted) with amendments at § 11-9-13.

Other Building Codes