Colorado Contractor Licenses: Updated Requirements Guide

Colorado uses a mixed contractor-licensing model: several trades are licensed statewide by Colorado agencies, while many contractor categories are licensed locally by cities and counties. Electricians and plumbers hold state licenses through the Division of Professions and Occupations (DPO). General building, mechanical/HVAC, and roofing licenses are issued by local jurisdictions such as Denver, the Pikes Peak Regional Building Department (Colorado Springs region), Aurora, Fort Collins, and Boulder.

This guide spotlights several common licenses and jurisdictions to help you get oriented; we update it periodically. You will find state-level licenses summarized together early in the guide, followed by per-trade sections highlighting local licensure where it applies. Always confirm current requirements with the official authority before you apply.

Expect to maintain different credentials when you work across multiple Colorado jurisdictions: state trade cards where required, plus city/county contractor licenses or registrations to pull permits locally. The sections below explain who regulates what, typical qualifications, examinations (PSI for state trade exams, ICC for many local contractor exams), fees where available, and renewal/continuing-education obligations.

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Overview of Colorado Contractor Licensing

Contractor regulation in Colorado is shared between state agencies and local building departments. The Colorado Division of Professions and Occupations (DPO) houses the State Electrical Board and the State Plumbing Board, which license electricians and plumbers statewide, set experience and education benchmarks, and require passing PSI examinations where applicable. Several specialty areas are also regulated at the state level by distinct agencies, including fire suppression systems (DFPC), water wells and pumps (DWR), conveyances/elevators (OPS), and asbestos/lead abatement (CDPHE).

Local jurisdictions maintain their own contractor licensing or registration systems for general building, mechanical/HVAC, and roofing work, among other categories. Examples include the City and County of Denver’s Community Planning and Development (CPD), the Pikes Peak Regional Building Department (PPRBD) for the Colorado Springs region, the City of Aurora, the City of Fort Collins, and the City of Boulder. These jurisdictions commonly require ICC-based competency exams, proof of insurance or bonds, and jurisdiction-specific renewal cycles.

In practice, many firms hold both: a state trade license for regulated work scopes (e.g., electrical, plumbing) and one or more local contractor licenses to submit permits where projects are located. The sections below first summarize state-level credentials, then detail local licensing by trade where applicable.

Primary Licensing Authority

Multiple Authorities – See research notes

Verified local jurisdictions:

Browse all Colorado contractor license practice tests →

State-Level Licenses in Colorado

State-level licenses are issued by Colorado agencies and apply statewide. Electricians and plumbers are regulated through DPO’s State Electrical Board and State Plumbing Board, with PSI-administered exams. Several specialty trades are also licensed or certified by state programs, including fire suppression system contractors (DFPC), well and pump contractors (DWR), conveyance contractors and mechanics (OPS), and asbestos/lead abatement (CDPHE). State credentials appear below by trade.

Local jurisdictions may still require contractors to register and show state cards when pulling permits. Always check city/county requirements for projects in Denver, the Colorado Springs region (PPRBD), Aurora, Fort Collins, Boulder, and surrounding counties.

State-Level Electrician Licenses

Apprentice Electrician Registration

Regulatory authority: Colorado State Electrical Board (DPO) — https://dpo.colorado.gov/Electrical/Apprentice

Scope: Registration for individuals starting supervised training toward Residential Wireman or Journeyman Electrician licensure.

Requirements:

  • Register within 30 days of initial employment as an electrical apprentice.
  • Accumulate supervised on-the-job training hours; classroom instruction in an approved program counts toward journeyman requirements.
  • Minimum age 18.
  • No examination required for registration.

Renewal: Aligned with Electrical Board rules; employers report annual training hours.

Contact the Colorado State Electrical Board to confirm application and renewal fees before applying.

Residential Wireman

Regulatory authority: Colorado State Electrical Board (DPO) — https://dpo.colorado.gov/Electrical/Applications

Requirements:

  • At least 4,000 hours of practical experience over a minimum of 2 years wiring one- to four-family dwellings; approved education/training may be credited per rule.
  • Minimum age 18.
  • Exam provider: PSI. Exam covers the National Electrical Code (as adopted) and Colorado statutes/rules.

Renewal: Every 3 years (September 30 on the Board’s triennial cycle); 24 hours of approved continuing education focused on code updates and Colorado electrical rules.

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Residential Wireman Practice Test.

Journeyman Electrician

Regulatory authority: Colorado State Electrical Board (DPO) — C.R.S. § 12-115-110

Requirements:

  • 8,000 hours (approx. 4 years) of electrical apprenticeship or practical experience, including at least 4,000 hours in commercial/industrial or similar work.
  • At least 288 classroom hours in safety, NEC, and applications within the last 8 years of training/experience.
  • Minimum age 18.
  • Exam provider: PSI. Exam covers the NEC as adopted and Colorado statutes/rules.

Renewal: Every 3 years; 24 hours of approved CE (NEC updates and Colorado rules).

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Journeyman Electrician Practice Test.

Master Electrician

Regulatory authority: Colorado State Electrical Board (DPO) — C.R.S. § 12-115-110

Requirements (one of the following):

  • Graduate electrical engineer + at least 1 year of practical construction electrical experience; or
  • Graduate of an electrical trade school/community college + at least 4 years of practical electrical experience; or
  • At least 1 year of qualifying supervisory/planning/layout/installation experience beyond journeyman requirements.
  • Minimum age 18; exam provider: PSI. Exam covers advanced NEC application, load calculations/design, and Colorado statutes/rules.

Renewal: Every 3 years; 24 hours of approved CE including NEC updates.

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Master Electrician Practice Test.

Electrical Contractor Registration

Regulatory authority: Colorado State Electrical Board (DPO) — C.R.S. § 12-115-110

Requirements:

  • Business entity must employ at least one Colorado-licensed Master Electrician as the Responsible Individual.
  • Meet statutory insurance requirements; workers’ compensation required if employing staff.
  • No trade examination for the entity; qualifying master must meet master standards.

Insurance: General liability per Board rule; workers’ compensation as applicable.

Renewal: Every 3 years on the contractor registration cycle.

Contact the Colorado State Electrical Board to confirm current application and registration fees before applying.

State-Level Plumbing Licenses

Apprentice Plumber Registration

Regulatory authority: Colorado State Plumbing Board (DPO) — https://dpo.colorado.gov/Plumbing/ApplicationsDocs

Scope: Registration for individuals gaining supervised experience toward Residential, Journeyworker, or Master Plumber licensure.

Requirements:

  • Register with the State Plumbing Board; work under supervision of a licensed residential, journeyworker, or master plumber.
  • Participate in a state- or federally-approved apprenticeship or equivalent training.
  • Minimum age 18; no examination for registration.

Renewal: Biennial on the Board’s cycle.

Contact the State Plumbing Board to confirm fees before applying.

Residential Plumber

Regulatory authority: Colorado State Plumbing Board (DPO) — https://dpo.colorado.gov/Plumbing/Applications

Requirements:

  • At least 3,400 hours (about 2 years) of practical plumbing experience to qualify for examination; experience verified by employer affidavits.
  • Minimum age 18.
  • Exam provider: PSI. Exam is multiple-choice based on the IPC, IFGC, and State Plumbing Board rules. Passing score 70%.

Renewal: All plumbing licenses expire the last day of February of odd-numbered years; 8 hours of Board-approved CE annually.

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Residential Plumber Practice Test.

Journeyworker Plumber

Regulatory authority: Colorado State Plumbing Board (DPO) — C.R.S. § 12-155-110

Requirements:

  • Up to 6,800 hours (about 4 years) of practical experience to qualify; completion of apprenticeship or equivalent training verified by Affidavit of Experience.
  • Minimum age 18.
  • Exam provider: PSI. Multiple-choice exam based on the adopted IPC and Colorado amendments. Passing score 70%.

Renewal: Expires last day of February in odd-numbered years; 8 hours of CE annually per Board rules.

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Journeyworker Plumber Practice Test.

Master Plumber

Regulatory authority: Colorado State Plumbing Board (DPO) — https://dpo.colorado.gov/Plumbing/Applications

Requirements:

  • At least 5 full-time years (8,500 hours) of practical plumbing experience; journeyman-level experience and training required, documented via employer affidavits.
  • Minimum age 18.
  • Exam provider: PSI. Multiple-choice exam based on the IPC, Colorado Plumbing Code, and state business-law topics. Passing score 75%.

Renewal: Expires the last day of February in odd-numbered years; at least 8 hours of CE annually.

Exam Prep: PDF study guide with 1,500-2,500 questions, complete answer keys, and reference locators to exact code sections. Study offline; no time or use limits. Colorado Master Plumber Practice Test.

Plumbing Contractor Registration

Regulatory authority: Colorado State Plumbing Board (DPO) — C.R.S. § 12-155-108

Requirements:

  • Registrant must be or employ a Colorado Master Plumber full-time, who supervises all plumbing work.
  • Demonstrate compliance with Colorado workers’ compensation and unemployment compensation laws.
  • No trade exam for the entity; the responsible master must hold active master licensure.

Insurance: General liability and workers’ compensation as required by Colorado law.

Renewal: Biennial on the Plumbing Board’s cycle.

Contact the State Plumbing Board to confirm application and registration fees before applying.

Water Conditioning Installer Registration

Regulatory authority: Colorado State Plumbing Board (DPO) — C.R.S. § 12-155-108

Requirements:

  • Meet Board-specified experience or certification standards; be certified by a national water-conditioning association recognized by the Board.
  • Minimum age 18; Board-prescribed examination to ensure familiarity with installation standards.

Renewal: Per State Plumbing Board schedule.

Contact the State Plumbing Board to confirm application fees and renewal timing before applying.

State-Level Specialty Licenses

Fire Suppression System Contractor Registration

Regulatory authority: Colorado Division of Fire Prevention and Control (DFPC) — https://dfpc.colorado.gov/fire-suppression-system-contractors

Requirements:

  • Employ a Responsible Managing Employee (RME) who is NICET III/IV in Water-Based Systems Layout, a Colorado PE, or a registered Colorado sprinkler fitter.
  • Demonstrate company qualifications and experience appropriate to the classification.

Fees: Application $100; initial registration $100; renewal $100; late penalty $25.

Insurance: At least $1,000,000 general liability, including products/completed operations.

Renewal: Annual; expires December 31.

Residential Fire Suppression System Contractor Registration

Regulatory authority: Colorado Division of Fire Prevention and Control (DFPC) — C.R.S. § 24-33.5-1206.1

Requirements: Demonstrate qualifications and experience specific to residential systems; designate a qualified RME per DFPC rules.

Fees: Application $100; initial $100; renewal $100; late penalty $25.

Insurance: At least $1,000,000 general liability.

Renewal: Annual; expires December 31.

Fire Suppression System Contractor – Underground Registration

Regulatory authority: Colorado Division of Fire Prevention and Control (DFPC) — C.R.S. § 24-33.5-1206.1

Requirements: Demonstrate competency installing underground supply lines from public water lines to system risers; designate an appropriately qualified RME.

Fees: Application $100; initial $100; renewal $100; late penalty $25.

Insurance: At least $1,000,000 general liability.

Renewal: Annual; expires December 31.

Water Well Construction Contractor License

Regulatory authority: State Board of Examiners of Water Well Construction and Pump Installation Contractors (DWR) — https://dwr.colorado.gov/public-information/boards-and-commissions

Requirements:

  • At least 2 years of experience in the applied-for construction method(s); Board-administered written and oral examination.
  • Age minimum 21; approved education may substitute for some experience.

Fees: Application $20; initial license $20; renewal $50; late penalty $100.

Financial responsibility: Surety bond, certificate of deposit, or letter of credit per statute.

Renewal: Annual; 8 hours of continuing education each year.

Pump Installation Contractor License

Regulatory authority: State Board of Examiners of Water Well Construction and Pump Installation Contractors (DWR) — Board Rules (CCR)

Requirements:

  • At least 2 years of experience in the type(s) of pump installation sought; Board-administered written and oral exam.
  • Age minimum 21; Board-approved education may substitute for some experience.

Fees: Application $20; initial license $20; renewal $50; late penalty $100.

Financial responsibility: Surety bond, certificate of deposit, or letter of credit per statute.

Renewal: Annual; 8 hours of continuing education every year.

Conveyance Contractor License

Regulatory authority: Colorado Division of Oil and Public Safety (OPS) — https://ops.colorado.gov/Conveyances

Requirements: Employ at least one licensed conveyance mechanic; meet OPS insurance and licensing requirements. Any examination requirements are specified in OPS regulations.

Fees: Application $500; initial license $500; renewal $500.

Insurance: General liability meeting § 9-5.5-115, C.R.S.

Renewal: Annual term.

Conveyance Mechanic License – Type 1

Regulatory authority: Colorado Division of Oil and Public Safety (OPS) — Conveyance Regulations (PDF)

Requirements:

  • At least 3 years of unsupervised work experience (1,700 hours per year) on elevators, escalators, moving walks, and platform lifts per ASME A17.1/A18.1.
  • Complete an OPS-approved training program or document equivalent experience; pass OPS-approved examination/competency assessment.

Fees: Application $125; initial license $125; renewal $125.

Renewal: Continuing education of 8 hours every 2 years.

General Abatement Contractor Certification (Asbestos)

Regulatory authority: Colorado Department of Public Health and Environment (CDPHE) — https://cdphe.colorado.gov/apcd-asbestos-support

Requirements: Employ certified supervisors and workers; submit application, fees, and supporting documentation; individuals complete EPA-approved training and pass state examinations by discipline.

Fees: Application $2,000; initial certification $2,000; renewal $1,000.

Renewal: Per CDPHE schedule; compliance with Regulation 8, Part B.

Lead Abatement Supervisor Certification

Regulatory authority: Colorado Department of Public Health and Environment (CDPHE) — https://cdphe.colorado.gov/apcd/for-lead-abatement-professionals

Requirements: Complete approved lead abatement supervisor training; meet experience standards; pass state examination covering Regulation 19 and lead-safe practices.

Renewal: Per CDPHE schedule.

Contact CDPHE to confirm current application and renewal fees before applying.

Photovoltaic Installer Registration

Regulatory authority: Colorado State Electrical Board (DPO) — SB25-165

Requirements: Contractors performing photovoltaic installation work (operating as of Sept. 1, 2025) must register if they employ at least one NABCEP-certified employee or an appropriately licensed electrical professional, and meet Board-defined qualifications and supervision rules.

Renewal: On the Electrical Board’s cycle.

Contact the State Electrical Board to confirm application fees, documentation, and renewal timing before applying.

Electrician Licenses in Colorado

Electrician licensing in Colorado is statewide under the Colorado State Electrical Board. All categories — apprentice registration, Residential Wireman, Journeyman Electrician, Master Electrician, and Electrical Contractor registration — are issued at the state level, with PSI administering the qualifying exams where required. Local jurisdictions may require registration of your state card to pull permits, but they do not issue separate electrician licenses. See the State-Level Licenses section above for full details and requirements.

Plumbing Licenses in Colorado

Plumbing licensing in Colorado is statewide under the Colorado State Plumbing Board. Apprentice registrations and Residential, Journeyworker, and Master plumber licenses — as well as Plumbing Contractor registrations and Water Conditioning Installer registrations — are managed at the state level, with PSI exams where required. Cities and counties may ask you to register your state license for permit issuance; consult your local building department for project-specific permitting procedures. Full state requirements appear in the State-Level Licenses section above.

HVAC Licenses in Colorado

Local jurisdictions in Colorado that issue their own HVAC/mechanical licenses are listed below.

Note: Some licenses in Colorado are issued at the city or county level. Requirements vary by jurisdiction. Check with your local authority or contact us with questions.

Denver Mechanical Contractor License (Local Jurisdiction)

Authority: City and County of Denver – Community Planning and Development (CPD): Contractor Licensing

Requirements:

  • Mechanical supervisor certificate typically requires ~4 years of field mechanical/HVAC installation experience plus passing an ICC mechanical exam.
  • Contractor license applicants must hold or employ a qualifying supervisor certificate holder.
  • Minimum age 18; ICC mechanical exam administered via ICC’s testing program (commonly Pearson VUE).

Fees: Initial license $250; renewal $250.

Insurance: General liability and workers’ compensation per Denver CPD rules.

Renewal: Every 3 years.

Contact Denver CPD to confirm current application fees and documentation before applying.

Mechanical Contractor A (Commercial) – Pikes Peak Regional Building Department (Local Jurisdiction)

Authority: Pikes Peak Regional Building Department (PPRBD): https://www.pprbd.org/

Requirements:

  • Document experience installing/replacing/servicing gas piping and HVAC systems in commercial structures, as reviewed by PPRBD’s licensing committee.
  • Pass an approved ICC National Standard or ICC Colorado mechanical contractor exam; provide references and project history.
  • Minimum age 18.

Fees: Application $50; initial license $200; renewal $200.

Insurance: General liability per RBC201.7 (e.g., minimums defined by PPRBD) and workers’ compensation where applicable.

Renewal: Annual; proof of insurance required each renewal.

Contact PPRBD to confirm current insurance minimums and accepted ICC exam IDs before applying.

Aurora Mechanical Systems Contractor License (Local Jurisdiction)

Authority: City of Aurora – Building Division: Contractor Licensing & Lookup

Requirements:

  • Hold ICC Mechanical “B” Contractor certification or equivalent; document qualifying experience per Aurora criteria.
  • Meet insurance and reference requirements; minimum age 18.
  • Exam provider: ICC (Mechanical B Contractor exam).

Fees: Application $120; initial license $150; renewal $150.

Bond/Insurance: $20,000 irrevocable license and permit bond plus appropriate liability insurance.

Renewal: Renew via Aurora4Biz on the city’s cycle.

Contact the Aurora Building Division to confirm accepted ICC certifications and current bonding forms before applying.

Boulder Mechanical Contractor License (Local Jurisdiction)

Authority: City of Boulder – Planning & Development Services: Contractor Licensing

Requirements: Provide proof of passing an appropriate ICC mechanical certification (e.g., Master Mechanical) and demonstrate relevant experience; minimum age 18. ICC exams are scheduled via Pearson VUE.

Insurance: General liability typically $1,000,000 per occurrence / $2,000,000 aggregate and workers’ compensation for employees.

Renewal: Annual (12 months from issuance).

Contact the City of Boulder to confirm exact fee schedule and insurance minimums before applying.

📍 Colorado Uses Local Licensing

Some contractor licensing in Colorado is handled by individual cities and counties rather than a state board. As a result, application forms, insurance minimums, exams, and renewal cycles can vary from one jurisdiction to another.

What this means for you:

  • Contact the specific city or county where you will perform work to confirm current requirements.
  • Expect to maintain multiple licenses if you work across different municipalities.
  • Insurance certificates may need to name each city/county individually.
  • Renewal cycles and CE requirements vary — track each separately.

To prepare efficiently for any required local competency exams, use code-focused study materials matching the code editions used by your jurisdiction.

General Contractor Licenses in Colorado

Local jurisdictions in Colorado that issue their own general contractor/building licenses are listed below.

Note: Some licenses in Colorado are issued at the city or county level. Requirements vary by jurisdiction. Check with your local authority or contact us with questions.

General Contractor Class A – Denver (Local Jurisdiction)

Authority: City and County of Denver – CPD: Contractor Licensing

Requirements:

  • Supervisor certificate requires extensive commercial/high-rise experience and passing an ICC General Building Contractor exam (e.g., F11), plus notarized project history.
  • Minimum age 18; ICC National Standard exam format.

Fees: Initial license $250; renewal $250.

Insurance: General liability and workers’ compensation per Denver code.

Renewal: Every 3 years.

Confirm Denver’s supervisor-certificate documentation, ICC exam ID, and current fees before applying.

Building Contractor B – Denver (Local Jurisdiction)

Authority: City and County of Denver – CPD: Contractor Licensing

Requirements: Supervisor certificate requires documented mid-rise/commercial experience and passing the ICC Building Contractor B exam; experience verification is part of the CPD supervisor application.

Fees: Initial license $250; renewal $250.

Insurance: General liability and workers’ compensation per Denver requirements.

Renewal: Every 3 years.

Confirm Denver’s accepted ICC exam version and experience affidavit requirements before applying.

Residential Contractor C – Denver (Local Jurisdiction)

Authority: City and County of Denver – CPD: Contractor Licensing

Requirements: Supervisor certificate requires residential-building experience and passing the ICC Residential Building Contractor exam; experience verification and CPD approval are required.

Fees: Initial license $250; renewal $250.

Insurance: General liability and workers’ compensation per Denver requirements.

Renewal: Every 3 years.

Confirm Denver’s experience documentation and supervisor-certificate prerequisites before applying.

Building Contractor A (General Commercial) – Pikes Peak Regional Building Department (Local Jurisdiction)

Authority: PPRBD: https://www.pprbd.org/

Requirements:

  • Scope includes constructing/altering/repairing any type or size of structure permitted by PPRBD code.
  • Demonstrate sufficient commercial construction experience; pass ICC National Standard (or ICC Colorado) Building Contractor A exam; provide references/project documentation.

Fees: Application $50; initial license $200; renewal $200.

Insurance: At least $1,000,000 per occurrence / $2,000,000 aggregate general liability, plus workers’ compensation as applicable (RBC201.7).

Renewal: Annual.

Contact PPRBD to confirm current insurance certificates and accepted ICC exam codes before applying.

Commercial Building Contractor – Aurora (Local Jurisdiction)

Authority: City of Aurora – Building Division: Contractor Licensing & Lookup

Requirements:

  • Hold ICC General Building Contractor “A” or “B” certification and document commercial construction experience.
  • Meet insurance and reference requirements; exam provider is ICC.

Fees: Application $120; initial license $359; renewal $359.

Bond/Insurance: $20,000 irrevocable license and permit bond and appropriate liability insurance.

Renewal: Typically every 3 years via Aurora4Biz.

Verify Aurora’s accepted ICC exam versions and bonding forms before applying.

Fort Collins General Contractor License (Local Jurisdiction)

Authority: City of Fort Collins – Building Services: Contractor Licensing

Requirements:

  • Proof of passing an ICC National Standard contractor exam for the license class (e.g., G11/G12/G13), plus three verified projects or equivalent experience.
  • Provide notarized employment affidavit, insurance documentation, and lawful presence documentation.

Fees: Application $75; initial license $300; renewal $225.

Insurance: General liability and workers’ compensation per Fort Collins requirements.

Renewal: Biennial term.

Confirm Fort Collins’ class definitions, accepted ICC exam IDs, and current fee schedule before applying.

Roofing Licenses in Colorado

Local jurisdictions in Colorado that issue their own roofing contractor licenses are listed below.

Note: Some licenses in Colorado are issued at the city or county level. Requirements vary by jurisdiction. Check with your local authority or contact us with questions.

Aurora Roofing Contractor License (Local Jurisdiction)

Authority: City of Aurora – Building Division: Contractor Licensing & Lookup

Requirements: ICC Roofing Contractor/Subcontractor certification and documented roofing experience; meet bonding and insurance standards. Exam provider is ICC.

Fees: Application $120; initial license $150; renewal $150.

Bond/Insurance: $20,000 irrevocable license and permit bond plus appropriate liability insurance.

Renewal: Per Aurora schedule, typically every 3 years.

Confirm Aurora’s accepted ICC credentials and bond forms before applying.

Larimer County Roofing Contractor License (Local Jurisdiction)

Authority: Larimer County Building Division: Contractor Licensing

Requirements: Provide proof of passing an ICC roofing exam or a valid license from an ICC-participating Colorado jurisdiction, plus three completed roofing projects or equivalent experience; provide lawful presence documentation.

Fees: Application $75; biannual fee structure for license term.

Insurance: General liability and workers’ compensation per county requirements.

Renewal: Every 2 years.

Confirm Larimer County’s accepted ICC exam IDs and current insurance minimums before applying.

Boulder County Roofing Contractor License (Local Jurisdiction)

Authority: Boulder County Building Division: Contractor License B60

Requirements: Pass an appropriate ICC roofing/building exam within the past 3 years or hold a valid license from an ICC-participating jurisdiction; provide proof of experience; schedule ICC exams via Pearson VUE.

Fees: Initial license $150; renewal $150.

Insurance: General liability per county requirements; workers’ compensation for employees.

Renewal: License valid for 3 years from issuance.

Confirm Boulder County’s accepted exam list, insurance certificate format, and current fees before applying.

Specialty Trade Licenses in Colorado

Many specialties are licensed at the state level (e.g., fire suppression contractors via DFPC, water wells/pumps via DWR, conveyances via OPS, asbestos/lead via CDPHE), as summarized above. Some cities and counties also require local contractor registrations to pull permits for specialty installations or alterations. Check local requirements for permitting logistics in addition to any state credential your scope requires.

Local Licensing Requirements

Major Cities with Local Requirements:

Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.

Application Process

  1. Identify the trade and license type (electrical, plumbing, or specialty) and confirm that it is regulated statewide by DPO or locally by city/county authorities.
  2. Create an online account in the Colorado Division of Professions and Occupations Online Services portal.
  3. Complete the appropriate new license or registration application, including affidavits of experience, training certificates and lawful presence documentation as required.
  4. Submit the application electronically with any required supporting documents and pay applicable application fees.
  5. For licenses requiring an exam, schedule the examination with PSI (for electrical and plumbing) or ICC (for contractor/mechanical classifications) once eligibility is confirmed.
  6. Pass the required examination and any practical or oral tests prescribed by the board or local authority.
  7. Obtain and submit proof of insurance and bonding where required (contractor registrations, fire suppression contractors, well drillers and pump installers).
  8. Receive license or registration approval and print the license using DPO’s or local jurisdiction’s online systems.
  9. Maintain the license or registration by completing continuing education, renewing on schedule and updating contact or qualifying-party information.

Timeline: For state-level trade licenses (electrical, plumbing), applications are generally processed within several weeks once complete; exams can be scheduled promptly through PSI. Local contractor licenses may take 1–4 weeks depending on jurisdiction and meeting schedules.

Reciprocity

Colorado has reciprocity with: Alaska, Arkansas, Idaho, Iowa, Minnesota, Montana, Nebraska, New Hampshire, New Mexico, North Dakota, Oklahoma, South Dakota, Utah, Wyoming

Requirements: Colorado offers journeyman electrician license reciprocity through the National Electrical Reciprocal Alliance (NERA) with listed states. Applicants must hold a current journeyman or master electrician certificate in good standing that allows journeyman-level work, obtained via a state-administered exam, and held for at least one year. Plumbing licenses are obtained by examination or endorsement; Colorado evaluates substantial equivalency but generally does not maintain broad named reciprocity lists. General contractor licensing is local and does not have state-level reciprocity.

Frequently Asked Questions

How long does it take to get a contractor license in Colorado?

For state-level trade licenses (electrical, plumbing), applications are generally processed within several weeks once complete; exams can be scheduled promptly through PSI. Local contractor licenses may take 1–4 weeks depending on jurisdiction and meeting schedules.

Can I transfer my license from another state to Colorado?

Colorado has reciprocity with Alaska, Arkansas, Idaho, Iowa, Minnesota, Montana, Nebraska, New Hampshire, New Mexico, North Dakota, Oklahoma, South Dakota, Utah, Wyoming. Colorado offers journeyman electrician license reciprocity through the National Electrical Reciprocal Alliance (NERA) with listed states. Applicants must hold a current journeyman or master electrician certificate in good standing that allows journeyman-level work, obtained via a state-administered exam, and held for at least one year. Plumbing licenses are obtained by examination or endorsement; Colorado evaluates substantial equivalency but generally does not maintain broad named reciprocity lists. General contractor licensing is local and does not have state-level reciprocity.

What happens if I fail the exam?

Retake policies are set by the exam provider for your license: PSI for state electrical and plumbing exams, and ICC for many local contractor/mechanical classifications. Review the provider’s candidate information for waiting periods, fees, and rescheduling rules.

Do I need insurance?

Yes. Insurance is often mandatory for contractor registrations at both the state and local levels. Examples include general liability and workers’ compensation for electrical and plumbing contractor entities, specific general-liability minimums for DFPC fire suppression contractors, and jurisdiction-defined minima for local building/mechanical/roofing licenses. Verify exact coverage and limits with your licensing authority.

How do I renew my license?

Renewal cycles vary by credential. Electrical licenses renew every 3 years (24 hours CE). Plumbing licenses expire the last day of February of odd-numbered years (8 hours CE annually). Local contractor licenses (general, mechanical/HVAC, roofing) renew on jurisdiction-set cycles (often annual to triennial). Always track each license separately.

What if my city has different requirements than what’s shown here?

Some contractor licensing in Colorado varies by jurisdiction. The information shown is for cities/counties where official data is available. Always verify requirements with your local building department, as local regulations take precedence. Search for “[Your City/County] contractor license” to find requirements specific to your area.

Where can I find practice tests for Colorado exams?

We offer comprehensive PDF practice tests for Colorado contractor license exams. Each test typically contains 1,500 to 2,500 code-relevant questions with precise answer keys and reference locators showing exact code sections. Browse Colorado contractor practice tests.

Colorado · Practice tests

Colorado contractor license practice tests

The Colorado practice tests we publish today: comprehensive PDF guides, typically 1,500 to 2,500 questions each, with full answer keys and reference locators to the exact code sections. We add new tests regularly, so if your license isn’t listed here, contact us and we’ll build it.

Browse all Colorado tests →

Related Official Resources

Official Sources for Further Details:

  1. Colorado State Electrical Board – Division of Professions and Occupations (DPO)
    https://dpo.colorado.gov/Electrical
    Official Board Site | Accessed: 2026-08-29
  2. Colorado Electrical Board – Applications and Forms
    https://dpo.colorado.gov/Electrical/Applications
    Official Board Site | Accessed: 2026-08-29
  3. Colorado State Plumbing Board – Division of Professions and Occupations (DPO)
    https://dpo.colorado.gov/Plumbing
    Official Board Site | Accessed: 2026-08-29
  4. Colorado Plumbing Applications and Forms
    https://dpo.colorado.gov/Plumbing/Applications
    Official Board Site | Accessed: 2026-08-29
  5. Division of Professions and Occupations – News Release on Electrical and Plumbing Exams
    https://content.govdelivery.com/accounts/CODORA/bulletins/30cdacc
    Official Board Site | Accessed: 2026-08-29
  6. Colorado Division of Fire Prevention and Control – Fire Suppression System Contractors
    https://dfpc.colorado.gov/fire-suppression-system-contractors
    Official Board Site | Accessed: 2026-08-29
  7. Colorado Division of Water Resources – Boards and Commissions (Contractor Licensing)
    https://dwr.colorado.gov/public-information/boards-and-commissions
    Official Board Site | Accessed: 2026-08-29
  8. Colorado Division of Oil and Public Safety – Conveyances
    https://ops.colorado.gov/Conveyances
    Official Board Site | Accessed: 2026-08-29
  9. Colorado Department of Public Health and Environment – Asbestos Support and Guidance
    https://cdphe.colorado.gov/apcd-asbestos-support
    Official Board Site | Accessed: 2026-08-29
  10. Colorado Department of Public Health and Environment – Lead Abatement Professionals
    https://cdphe.colorado.gov/apcd/for-lead-abatement-professionals
    Official Board Site | Accessed: 2026-08-29
  11. City and County of Denver – Contractor Licensing
    https://www.denvergov.org/Government/Agencies-Departments-Offices/Community-Planning-and-Development/Contractor-Licensing
    Official City Licensing Site | Accessed: 2026-08-29
  12. Pikes Peak Regional Building Department – License Types
    https://www.pprbd.org/Licensing/LicenseTypes
    Official Regional Licensing Site | Accessed: 2026-08-29
  13. City of Aurora – Contractor Licensing and Lookup
    https://www.auroragov.org/business_services/building_division/contractor_licensing_and_lookup
    Official City Licensing Site | Accessed: 2026-08-29
  14. City of Fort Collins – Contractor Licensing
    https://www.fortcollins.gov/Business/Permits-and-Licensing/Other-Licenses-and-Permits/Contractor-Licensing
    Official City Licensing Site | Accessed: 2026-08-29
  15. City of Boulder – Contractor Licensing
    https://bouldercolorado.gov/services/contractor-licensing
    Official City Licensing Site | Accessed: 2026-08-29
  16. PSI Exams – Program List (Colorado Electricians and Plumbers)
    https://www.psiexams.com/test-takers/program-list/
    Exam Provider | Accessed: 2026-08-29

Important Disclaimer

Information Currency: This guide reflects licensing information as available in 2026. Licensing requirements are subject to change without notice. Always verify current requirements with official sources.

Official Source: For current information, contact Multiple Authorities – See research notes:

No Legal Advice: This guide provides general information only. Consult with the licensing board or a qualified professional for guidance specific to your situation.

Local Requirements: Some licensing in Colorado is handled at the city or county level. Always verify requirements with your local building department.

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