Homeowners have the right to do work on their own property without having to register as a licensed contractor.
Electric and plumbing permits for work in Brush! are issued through the State of Colorado, which does require electricians and plumbers who are contracted to do work to be registered as a licensed contractor. Be aware that it is a violation of state statutes for an individual (other than the homeowner) that is not a registered contractor to install electrical or plumbing projects on your property.
Access to State electric and plumbing permits can be found here: https://www.colorado.gov/pacific/dora/DPO_Electrical_Plumbing_Permits