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
National Standard General Building Contractor (A) (B) (C)
General 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
Plumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.
Colorado Master Plumber
Plumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.
Colorado Residential Plumber
Plumbing work is regulated at the state level, and in some cases ,the local level.
Experience requirements exist for each classification.