Contractors License Overview
- Colorado regulates Electrical and Plumbing licenses at the state level.
- Building contractors are not regulated at the state level. However, many cities and counties have local license requirements, and many use the same ICC National Standard Building exams.
- Pre-approval is required for all Electrical and Plumbing trade exams.
- No pre-approval is required for the ICC National Standard Building exams.
- Information regarding exam details, reference materials, experience requirements, reciprocity, and other requirements for obtaining and maintaining a license are available by selecting the license links found below.

Colorado Commercial
Colorado Building Contractor
We offer custom training options for the Colorado Building Contractor training built around your schedule. Find out now what options we have available.
Explore Custom Training TodayNational Standard General Building Contractor (A) (B) (C)
We offer custom training options for the National Standard General Building Contractor (A) (B) (C) training built around your schedule. Find out now what options we have available.
Explore Custom Training TodayGeneral Building Contractor A is licensed to construct, remodel, or repair any structure or addition.
Building Contractor B is licensed to construct, remodel, or repair commercial buildings and single-multi-dwelling buildings not exceeding 3 stories.
Residential Building Contractor C is licensed to construct, remodel, or repair residential buildings not exceeding two stories
Colorado Electrical
Colorado Plumbing
Colorado Journeyman Plumber
We offer custom training options for the Colorado Journeyman Plumber training built around your schedule. Find out now what options we have available.
Explore Custom Training TodayPlumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.
Colorado Master Plumber
We offer custom training options for the Colorado Master Plumber training built around your schedule. Find out now what options we have available.
Explore Custom Training TodayPlumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.
Colorado Residential Plumber
We offer custom training options for the Colorado Residential Plumber training built around your schedule. Find out now what options we have available.
Explore Custom Training TodayPlumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.