Colorado Building Codes and Contacts

The following information is reprinted with permission from the Building Codes Assistance Project:
Colorado climate zones
Current Commercial Code

No statewide code.

Current Residential Code

No statewide code.

Legislation passed in 2007 set the 2003 IECC as the minimum energy code requirement, applicable only to jurisdictions that had already adopted any type of building code or planned to do so in the future. According to BCAP’s research as a part of its Compliance Planning Assistance (CPA) program, 97% of Colorado citizens live in

jurisdictions that have adopted some version of the IECC; the 2003 IECC can be considered the de facto mandatory minimum code.

Code Enforcement

Energy codes are not enforced at the state level, except for public buildings, manufactured and modular housing, and hotels and high-rise residential buildings in jurisdictions without an energy code. Local enforcement agencies in jurisdictions that have adopted building codes are required to enforce the provisions of the residential energy code at the local level, but may adopt their own requirements without state approval. Inspections are required as a part of the established building inspection process.

The Governor’s Energy Office (GEO) works in close partnership with building departments to provide energy code training, information and other resources to support local adoption and implementation.

Significant local code adoptions include El Paso County (2009 IECC), Denver (2009 IECC with amendments; currently considering the 2015 IECC), Arapahoe (2009 IECC), Jefferson County (2009 IECC), Larimer County (2012 IECC), and Boulder County (2012 IECC).

Denver has adopted the 2015 IECC with amendments.

Routt County plans to adopt and implement the 2015 IECC no later than January 2017.

Please see the Colorado Department of Local Affairs for Colorado 2012 and 2009 IECC adoption statuses by county.

Read more about: 

Climate Zones: 4B, 5B, 6B, 7

Code Adoption and Change Process

Code Change Process

Legislative: Local jurisdictions can and do adopt their own energy code requirements, but a statewide energy code would have to be promulgated by the state legislature. The legislature meets in regular session during January each year unless the previous year’s legislature amends the date of next convening through a joint resolution.

Code Change Cycle

No set schedule

Next Code Update


Colorado Code Contacts

Rick Hanger
Housing Technology and Standards Manager
Department of Local Affairs
Division of Housing


Peter Rusin
Residential Buildings
Program Manager
Colorado Energy Office

Jeff Ackermann
Colorado Energy Office

Jim Meyers
Buildings Efficiency Program
Southwest Energy Efficiency Project

Christine Brinker
Senior Associate
Buildings Efficiency Program
Southwest Energy Efficiency Project

This information was compiled by the Building Codes Assistance Project, and used with their permission.