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Westminster, Colorado Building Codes

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.

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

Westminster, CO also adopts the following codes:

  • The National Electrical Code (NFPA-70), as adopted by the state of Colorado. Westminster, CO Muni. Code § 11-9-7 (amendments).
  • The International Plumbing Code, 2015 edition, Chapters 2 through 15 inclusive and Appendix Chapters C and E inclusive. Westminster, CO Muni. Code § 11-9-8 (amendments).
  • The International Mechanical Code, 2015 edition, Chapters 2 through 15 inclusive. Westminster, CO Muni. Code § 11-9-9 (amendments).
  • The International Fuel Gas Code, 2015 edition, Chapters 2 through 8 inclusive and Appendix A. Westminster, CO Muni. Code § 11-9-10 (amendments).
  • The International Energy Conservation Code, 2015 edition, Chapters 2 through 6 inclusive and Residential Chapters (RE) 2 through 6 inclusive. Westminster, CO Muni. Code § 11-9-11 (amendments).
  • The International Swimming Pool and Spa Code, 2015 edition, Chapters 2, 3, and 11 inclusive. Westminster, CO Muni. Code § 11-9-12 (amendments).

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

  • The International Fire Code, 2015 edition, including Appendices B, C, D, E, F, G, H, and I. Westminster, CO Muni. Code § 11-10-2.