Overview
Colorado splits contractor licensing down the middle, and knowing which side your work falls on saves you weeks. General and building contractors are licensed locally. Each city and county sets its own rules, runs its own application, and issues its own credential, so a Denver building contractor license does not travel to Aurora or Larimer County. Electricians and plumbers work under a single statewide system run by the Colorado Department of Regulatory Agencies, whose Division of Professions and Occupations operates the State Electrical Board and the State Plumbing Board. One state card covers those trades everywhere in Colorado, though you still register locally and pull permits in each jurisdiction where you work.
How Local General Contractor Licensing Works
There is no Colorado general contractor license to apply for, because the authority sits with municipalities and counties. Denver licenses building contractors by class, tied to the size and type of structures you can build, and most larger jurisdictions follow a similar tiered model. Expect a written exam in most cities, frequently an ICC-based test covering building codes and business and law, plus proof of experience, insurance, and often a bond. The practical consequence shapes how growing firms operate: a contractor working the Front Range carries a stack of separate licenses, one per jurisdiction, and renews each on its own clock. Start with the building department of the city or county where the project sits, and confirm the class of license the job size demands before you bid.
State Licensing For Electricians And Plumbers
Electrical and plumbing run on their own statewide track through DORA. On the electrical side, a journeyman license requires roughly 8,000 hours and four years of wiring experience, with two of those years in commercial or industrial work, followed by the PSI journeyman exam at a 70 percent passing score. The master electrician credential builds on a passed journeyman exam plus additional experience or an electrical engineering degree. Plumbing mirrors the structure: the journeyworker license calls for about 6,800 hours over four years and a 70 percent PSI exam, while the master plumber level requires roughly 8,500 hours and a higher 75 percent passing mark. Business-level electrical and plumbing contractor registrations attach to a responsible master who holds the individual license. These state credentials are the floor for trade work anywhere in Colorado, and any subcontractor doing electrical or plumbing must hold the matching state license regardless of what the general contractor carries.
How Denver Sorts Building Contractors By Class
Denver runs the tightest license tiers of any Colorado jurisdiction, and the tier you qualify for is set by a supervisor certificate before you ever touch a contractor application. Class A clears you to erect, alter, or demolish any structure, including high-rises above 75 feet, and demands seven years of commercial building experience plus ICC exam F11 (National Standard General Building Contractor A). Class B covers buildings in the 55 to 75 foot range and asks for four years of ground-up commercial work behind ICC exam F12. A B-2 variant handles structures topping out around 30 to 40 feet on that same F12 exam. Class C is the residential lane, scoped to one- and two-family dwellings, U-occupancy buildings, and IRC townhouses, requiring two years as a journeyman carpenter or foreman and ICC exam F13. Project management time or a relevant degree can substitute for up to two years on the A track and one year lower down. Below those sit 45-plus Class D specialty certificates for single trades, most of which need two years of experience and no exam at all. The supervisor certificate is the gate: Denver will not accept a license application until that certificate is approved, and the exams run open-book with a 70 percent pass line. Read the breakdown at Denver's construction certificate page.
Where Colorado Springs, Aurora, And The Counties Diverge
Cross the county line and the rulebook changes. Colorado Springs and the rest of El Paso County license through the Pikes Peak Regional Building Department, a single regional authority that issues permits and contractor licenses for every town and city in the county. PPRBD slices its building classes finer than Denver: a B-A general commercial license covers any size or type of structure, while A-2, B-1, and B-2 step down by occupancy group and square footage, B-C handles homes up to three stories, and B-D specialty licenses cover single trades like foundation repair, masonry, roofing, and solar. Renewals run annually, priced around $200 for the top class and scaling down. PPRBD also runs a free monthly Contractor 101 session for anyone new to the department. Aurora operates its own building division with a separate application track, so a Denver certificate does not transfer there. Unincorporated counties add a third pattern entirely: some require local registration, some lean almost entirely on the state electrical and plumbing licenses with light building oversight, and a handful of rural counties license general construction barely at all. The practical takeaway is that a contractor working the Front Range often carries three or four separate municipal credentials at once, each renewed on its own clock.
The DORA Electrical Ladder, Rung By Rung
Electrical work answers to one statewide authority, the State Electrical Board inside DORA, and the path climbs in defined steps. Every newcomer registers as an apprentice before performing paid work, then logs field hours under a licensed electrician while completing 288 hours of classroom instruction that all license candidates must show. A residential wireman credential opens at two years and 4,000 hours confined to one- to four-unit dwellings. The journeyman license raises the bar to four years and 8,000 hours, with at least 2,000 of those in commercial or industrial settings, or a two-year trade degree paired with 6,000 hours. Master electrician sits on top, adding a year and 2,000 hours of planning, layout, and installation supervision beyond the journeyman threshold. The licensing exam runs four and a half hours, 90 scored questions, a 70 percent pass mark, and a $78 fee. Active licensees clear 24 continuing-education hours every three-year cycle. One credential the public often overlooks is the electrical contractor registration: a company that bids electrical work must register with the Board and employ a licensed master as its responsible individual, plus prove compliance with workers' compensation and unemployment law. The license certifies the person, the registration authorizes the business.
DORA Plumbing And The Reciprocity Reality
Plumbing mirrors the electrical structure under a parallel body, the State Plumbing Board. Apprentices register with the Board before any compensated work and build hours under supervision. The journeyman plumber license requires roughly four years and 8,000 qualifying hours, typically through a registered apprenticeship recognized by the Colorado Department of Labor and Employment, capped by a passing exam. Master plumber climbs to about five years and 8,500 hours, including at least one year working as a licensed Colorado journeyman, plus a master-level exam testing code proficiency. A residential plumber tier covers dwelling work at a lower hour count. Reciprocity is where expectations collide with reality. On the electrical side, Colorado honors journeyman agreements through the National Electrical Reciprocal Alliance with states such as Idaho, Iowa, Minnesota, Montana, Nebraska, and New Mexico, requiring an active out-of-state certificate earned by exam and held at least a year, though a master license never transfers by reciprocity. Plumbing is stricter still: Colorado grants no blanket license reciprocity, so an out-of-state plumber submits verified employment records and must meet the same hour thresholds as an in-state applicant. Migrating a credential into Colorado means documenting field hours that satisfy the Board, not flashing a license from elsewhere. Both boards live under Colorado DORA.
Frequently Asked Questions
Does Colorado have a statewide general contractor license? No. General and building contractor licensing happens at the city and county level. You apply directly to the jurisdiction where you build, and each one issues its own credential.
Who licenses electricians and plumbers in Colorado? DORA's Division of Professions and Occupations, through the State Electrical Board and the State Plumbing Board. Both credentials are valid statewide.
If I hold a Denver contractor license, can I build in another city? Usually not. Most jurisdictions do not honor licenses issued elsewhere, so you register and license separately in each one where you take work.
Do I need to pass an exam? For the trades, yes. PSI administers the journeyman and master exams for electricians and plumbers. Most local GC licenses also require a written exam, often an ICC-based test.
My state electrical license covers the state, so why register locally? A state license qualifies you to do the work, but individual cities and counties still require local business registration and issue the permits for each project.
Do I need a Denver supervisor certificate and a contractor license, or just one? Both, and in order. The supervisor certificate is the qualifying exam-and-experience credential tied to a person, and Denver will not process the contractor license application until that certificate is approved. The license then attaches the certified supervisor to a contracting business.
If I hold a Denver Class A license, can I build in Colorado Springs? No. Colorado Springs licenses through the Pikes Peak Regional Building Department on its own class system and renewal cycle, and it does not recognize a Denver certificate. You apply separately to PPRBD, just as you would apply separately to Aurora or to an unincorporated county that requires registration.
Does my out-of-state journeyman electrician license transfer to Colorado? Sometimes. Colorado follows the National Electrical Reciprocal Alliance for journeyman licenses from member states like Idaho, Minnesota, Montana, Nebraska, and New Mexico, provided your certificate is active, earned by state exam, and held at least a year. A master electrician license never transfers by reciprocity, and you sit the Colorado master exam instead.
Why do my local licenses lapse even when my state trade license is current? They run on different clocks and different authorities. The DORA electrical and plumbing licenses renew on the state schedule, while municipal building licenses in Denver, Colorado Springs, and Aurora renew on their own annual cycles. A current DORA credential does not keep a city building license active, so contractors track each renewal date independently to avoid working unlicensed.
Editor’s Note
One detail trips up out-of-state firms expanding into Colorado: the local GC license and the state trade license are not interchangeable, and holding one says nothing about the other. A licensed master plumber still answers to the local building department for permits, and a licensed Denver building contractor still subcontracts electrical and plumbing to people holding state cards. Map both layers before you commit to a market, jurisdiction by jurisdiction.