Colorado Contractor Licenses: Updated Requirements Guide
Colorado uses a blended contractor licensing system. Several trades are licensed by state boards, while many building, mechanical, roofing, fire protection, and demolition activities are licensed at the city or county level. Understanding which authority regulates your scope of work is the key first step to getting licensed correctly.
This guide walks you through both layers: state-level licenses issued or overseen by Colorado agencies, followed by local licenses issued by jurisdictions such as the City and County of Denver. We highlight several representative licenses and authorities for Colorado below; this guide is updated periodically as additional jurisdictions are researched or requested.
Use the quick navigation to jump to your trade. In each section, you will find the relevant authority, qualification requirements, fees when available, and renewal cycles. Where data varies by locality, we point directly to the official local licensing page so you can confirm current rules before you apply.
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Overview of Colorado Contractor Licensing
Contractor licensing in Colorado is shared between state agencies and local governments. At the state level, the Colorado Department of Regulatory Agencies (DORA), through the Division of Professions and Occupations (DPO), oversees the State Electrical Board and the State Plumbing Board. These boards regulate electricians, plumbers, apprentices, and associated contractor registrations.
At the local level, the City and County of Denver’s Community Planning and Development (CPD) administers contractor licensing for general building, residential, mechanical/HVAC, roofing, fire protection, demolition, and other scopes. Other municipalities may have their own requirements for local licensing or contractor registration to obtain permits.
Additional specialized activities are regulated by other state agencies. The Colorado Division of Water Resources regulates water well construction and pump installation contractors through the State Board of Examiners of Water Well and Ground Water Heat Exchanger Contractors. The Colorado Department of Public Health and Environment regulates asbestos abatement contractor certification and notifications. Always verify the correct authority for your trade and scope before applying.
Browse all Colorado contractor license practice tests →
State-Level Licenses in Colorado
Colorado issues several licenses at the state level. Electricians and plumbers are regulated under statewide programs administered by DORA’s Division of Professions and Occupations through the State Electrical Board and the State Plumbing Board. In addition, the Division of Water Resources and the Department of Public Health and Environment regulate specified specialty contractors.
Below are the state-level licenses organized by trade. Local licenses for general contracting, many HVAC/mechanical scopes, roofing, and certain specialty trades appear later in the trade-specific sections.
State-Level Electrician Licenses
Residential Wireman Electrician
Authority: Colorado State Electrical Board, DPO, DORA — https://dpo.colorado.gov/Electrical
Exam: Required (contact the Board to verify the approved exam provider).
Experience: 4,000 hours of residential-only experience earned in at least 2 years.
Education: 288 hours of classroom education.
Renewal: Every 3 years; 24 hours of continuing education covering grounding and bonding, National Electrical Code changes, wiring methods, theory/calculations, and safety.
Source: https://dpo.colorado.gov/Electrical/Applications
Contact the State Electrical Board to confirm application and renewal fees and the approved exam provider details before applying.
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
Authority: Colorado State Electrical Board, DPO, DORA — https://dpo.colorado.gov/Electrical
Exam: Required (contact the Board to verify the approved exam provider).
Experience: 8,000 hours earned in at least 4 years, including 2,000 hours of commercial or industrial work.
Education: 288 hours of classroom education.
Renewal: Every 3 years; 24 hours of continuing education covering grounding and bonding, National Electrical Code changes, wiring methods, theory/calculations, and safety.
Source: https://dpo.colorado.gov/Electrical/Applications
Contact the State Electrical Board to confirm application and renewal fees and the approved exam provider details before applying.
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
Authority: Colorado State Electrical Board, DPO, DORA — https://dpo.colorado.gov/Electrical
Exam: Required (contact the Board to verify the approved exam provider).
Experience: One qualifying path requires 10,000 hours earned in at least 5 years; alternative paths include specified electrical-engineering education or trade-school education combined with construction experience.
Education: 288 hours of classroom education.
Renewal: Every 3 years; 24 hours of continuing education covering grounding and bonding, National Electrical Code changes, wiring methods, theory/calculations, and safety.
Source: https://dpo.colorado.gov/Electrical/Applications
Contact the State Electrical Board to confirm application and renewal fees and the approved exam provider details before applying.
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
Authority: Colorado State Electrical Board, DPO, DORA — https://dpo.colorado.gov/Electrical
Exam: Not required.
Requirements: Must hold or employ a licensed master electrician as the responsible individual; acknowledgment of responsibility must be signed by the responsible master and the company owner (if different). Provide evidence of compliance with workers’ compensation and unemployment compensation laws.
Renewal: Every 3 years.
Source: https://dpo.colorado.gov/Electrical/Applications
Contact the State Electrical Board to confirm application and renewal fees and any additional bonding or insurance documentation required for the company.
State-Level Plumbing Licenses
Residential Plumber
Authority: Colorado State Plumbing Board, DPO, DORA — https://dpo.colorado.gov/Plumbing
Exam: Required; provider is PSI.
Experience: Two years and 3,400 hours of practical experience.
Exam Details: Written multiple-choice exam based on the International Plumbing Code, International Fuel Gas Code, and Colorado Plumbing Board rules; passing score 70%.
Renewal: Every 2 years; at least 8 hours of continuing education each year, including at least 4 code-related hours during each 24-month period.
Source: https://dpo.colorado.gov/Plumbing/Applications
Contact the State Plumbing Board to confirm application and renewal fees and current CE course approval criteria.
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
Authority: Colorado State Plumbing Board, DPO, DORA — https://dpo.colorado.gov/Plumbing
Exam: Required; provider is PSI.
Experience: Up to four years and 6,800 hours of practical experience.
Exam Details: Written multiple-choice exam based on the International Plumbing Code, International Fuel Gas Code, and Colorado Plumbing Board rules; passing score 70%.
Renewal: Every 2 years; at least 8 hours of continuing education each year, including at least 4 code-related hours during each 24-month period.
Source: https://dpo.colorado.gov/Plumbing/Applications
Contact the State Plumbing Board to confirm application and renewal fees and current CE course approval criteria.
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
Authority: Colorado State Plumbing Board, DPO, DORA — https://dpo.colorado.gov/Plumbing
Exam: Required; provider is PSI.
Experience: Five full-time years and 8,500 hours of practical experience.
Exam Details: Written multiple-choice exam based on the International Plumbing Code, International Fuel Gas Code, and Colorado Plumbing Board rules; passing score 75%.
Renewal: Every 2 years; at least 8 hours of continuing education each year, including at least 4 code-related hours during each 24-month period.
Source: https://dpo.colorado.gov/Plumbing/Applications
Contact the State Plumbing Board to confirm application and renewal fees and current CE course approval criteria.
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
Authority: Colorado State Plumbing Board, DPO, DORA — https://dpo.colorado.gov/Plumbing
Exam: Not required.
Requirements: Plumbing contractors are licensed/registered by the State Plumbing Board; applications and registrations are administered through the Board.
Renewal: Every 2 years.
Source: https://dpo.colorado.gov/Plumbing
Contact the State Plumbing Board to confirm application and renewal fees, bonding/insurance documentation, and any responsible individual requirements.
Plumbing Apprentice
Authority: Colorado State Plumbing Board, DPO, DORA — https://dpo.colorado.gov/Plumbing
Registration: Required. An apprentice is an individual employed in the plumbing trade who does not hold a Colorado plumber license; apprentices must be registered until they obtain a Colorado plumber license.
Source: https://dpo.colorado.gov/Plumbing/Applications
Contact the State Plumbing Board to confirm registration fees, employer supervision requirements, and upgrade pathways to licensure.
State-Level Specialty Licenses
Water Well Construction Contractor
Authority: Colorado Division of Water Resources, State Board of Examiners of Water Well and Ground Water Heat Exchanger Contractors — https://dwr.colorado.gov/public-information/boards-and-commissions
Exam: Required.
Requirements: Maintain a current license. The agency provides contractor applications, licensing-process instructions, experience verification, contractor bond forms, financial-responsibility instructions, and continuing-education requirements.
Source: https://dwr.colorado.gov/public-information/boards-and-commissions
Contact the Division of Water Resources to confirm application and renewal fees, CE hour requirements, and exam scheduling procedures.
Pump Installation Contractor
Authority: Colorado Division of Water Resources, State Board of Examiners of Water Well and Ground Water Heat Exchanger Contractors — https://dwr.colorado.gov/public-information/boards-and-commissions
Exam: Required.
Requirements: Maintain a current license; contractors may be licensed for one or more types of construction or installation and are subject to experience verification, financial responsibility, bonding, and continuing education.
Source: https://dwr.colorado.gov/public-information/boards-and-commissions
Contact the Division of Water Resources to confirm application and renewal fees, CE hour requirements, and exam scheduling procedures.
General Abatement Contractor (Asbestos)
Authority: Colorado Department of Public Health and Environment (CDPHE), Air Pollution Control Division — https://cdphe.colorado.gov/apcd-asbestos-support
Requirements: Asbestos abatement must be conducted by a Colorado-certified General Abatement Contractor. The contractor must submit an Asbestos Abatement Notification and Permit Application with the applicable permit fee.
Source: https://cdphe.colorado.gov/apcd-asbestos-support
Contact CDPHE to confirm certification application steps, permit fees, and renewal cycle.
Electrician Licenses in Colorado
Colorado licenses electricians at the state level through the State Electrical Board. Many jurisdictions also require contractors to register with the local building department to pull permits or to associate a state license with a local account. Use the local licensing references below to confirm any jurisdictional registration steps in addition to your state license.
Local Licensing Requirements
Major Cities with Local Requirements:
- City and County of Denver, Community Planning and Development, Contractor Licensing: Local contractor licensing and registration program administered by Community Planning and Development; verify electrical permit registration procedures, documentation, and local administrative requirements directly with Denver. Registration information: https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
Plumbing Licenses in Colorado
Colorado licenses plumbers at the state level through the State Plumbing Board. In addition to your state license, local building departments may require contractor registration to obtain permits or to associate your state credentials with local systems. Use the local references below to confirm any city/county registration steps that apply to your projects.
Local Licensing Requirements
Major Cities with Local Requirements:
- City and County of Denver, Community Planning and Development, Contractor Licensing: Local contractor licensing and registration program administered by Community Planning and Development; verify plumbing permit registration, documentation, and any insurance or bonding conditions directly with Denver. Registration information: https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
HVAC Licenses in Colorado
Local jurisdictions in Colorado that issue their own HVAC/mechanical licenses are shown below. Denver administers several mechanical contractor licenses that require a qualifying supervisor certificate and, in many cases, passing an ICC examination tied to the relevant scope.
Heating and Ventilating Contractor Class A (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required; ICC examination referenced for the qualifying supervisor certificate.
Requirements: Requires the corresponding Denver supervisor certificate before the contractor license is issued. Scope includes warm-air heating, ventilation, evaporative cooling, exhaust systems, ductwork, range hoods, certain water heaters, gas piping, controls, venting, sheet metal, and limited comfort-cooling refrigeration.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Mechanical Certificates
Contact Denver CPD to confirm insurance minimums and required documentation for issuance and renewal.
Refrigeration Contractor Class A (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required; ICC examination referenced for the qualifying supervisor certificate.
Requirements: Requires a Denver Refrigeration Class A supervisor certificate. Scope includes installation, alteration, or repair of refrigeration systems and appurtenant cooling towers, pipe insulation, and qualifying low-voltage wiring.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Mechanical Certificates
Contact Denver CPD to confirm insurance minimums and required documentation for issuance and renewal.
Refrigeration Contractor Class B (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required; ICC examination referenced for the qualifying supervisor certificate.
Requirements: Requires a Denver Refrigeration Class B supervisor certificate. Scope includes refrigeration systems of 5 tons or less in specified residential and Group U occupancies, including certain precharged systems and gas-fired absorption chillers.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Mechanical Certificates
Contact Denver CPD to confirm insurance minimums and required documentation for issuance and renewal.
Gas Service Contractor (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required; ICC examination referenced for the qualifying supervisor certificate.
Requirements: Requires a qualifying Denver supervisor certificate. Scope includes gas and liquid-fuel piping, controls, commercial cooking equipment, ranges, dryers, conversion burners, and specified venting and water-heater work.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Mechanical Certificates
Contact Denver CPD to confirm insurance minimums and required documentation for issuance and renewal.
📍 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
General contractor licensing is issued locally in many Colorado jurisdictions. Denver licenses multiple classes and generally requires an associated supervisor certificate holder or acceptance of certain state licenses before issuing the local contractor license.
General Contractor Class A (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Requirements: Requires a supervisor certificate holder, an employed supervisor certificate holder, or a Colorado electrical or plumbing license before Denver accepts the contractor license application.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Contractor Licensing Fees
Contact Denver CPD to confirm insurance and bonding requirements, required documentation, and any additional supervisory criteria.
Building Contractor Class B (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Requirements: Requires the corresponding Denver Building Class B supervisor certificate or an employed certificate holder before the contractor license is issued.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Contractor Licensing Fees
Contact Denver CPD to confirm insurance and bonding requirements, required documentation, and any additional supervisory criteria.
Residential Contractor Class C (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Requirements: Requires the corresponding Denver residential construction supervisor certificate or an employed certificate holder before the contractor license is issued.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Contractor Licensing Fees
Contact Denver CPD to confirm insurance and bonding requirements, required documentation, and any additional supervisory criteria.
Roofing Licenses in Colorado
Roofing contractor licensing is administered locally in jurisdictions such as Denver. The license below reflects Denver’s specialty roofing category and its associated supervisor-certificate model.
Roof Covering and Waterproofing Contractor (Specialty Class D) (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required; supervisor certificate testing/qualification applies (verify details with Denver).
Requirements: Scope includes installation of commercial and residential roof coverings, valleys, gutters, downspouts, and waterproofing. Work must be performed under onsite supervision of a Class D Roof Covering and Waterproofing Supervisor Certificate holder (two years of field experience documented through at least 24 projects from 24 different months; at least 75% of installation projects must involve different low-slope commercial roof systems).
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Specialty Class D Certificates
Contact Denver CPD to confirm insurance and bonding requirements and to verify current supervisor-certificate examination or evaluation procedures.
Specialty Trade Licenses in Colorado
Local licensing is common for certain specialties in Colorado. Denver licenses fire protection and demolition contractors under a supervisor-certificate framework, with a three-year renewal cycle. State-level specialty credentials (water well and pump installation contractors; asbestos general abatement contractors) are covered earlier in the State-Level Licenses section.
Fire Protection Contractor Class A (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required for the qualifying supervisor certificate (verify details with Denver).
Requirements: Identified by Denver as a contractor license category requiring a current Denver Fire Protection supervisor certificate.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Code Policy ADMIN 120A
Contact Denver CPD to confirm insurance and bonding requirements and supervisor-certificate examination specifics.
Demolition Contractor Class A (Local Jurisdiction)
Authority: City and County of Denver, Community Planning and Development, Contractor Licensing — Official site
Exam: Required for the qualifying supervisor certificate (verify details with Denver).
Requirements: Identified by Denver as a contractor license category requiring the corresponding Denver supervisor certificate.
Fees: License fee $250.
Renewal: Every 3 years.
Source: Denver Code Policy ADMIN 120A
Contact Denver CPD to confirm insurance and bonding requirements and supervisor-certificate examination specifics.
Application Process
- Identify whether the trade is regulated by the Colorado State Electrical Board, Colorado State Plumbing Board, Colorado Division of Water Resources, Colorado Department of Public Health and Environment, or a local jurisdiction.
- Complete the applicable state or local application.
- Submit experience affidavits, education documentation, business documents, financial responsibility, bonds, insurance or workers’ compensation documentation when required.
- Obtain approval to test where an examination is required.
- Schedule and pass the required examination with the confirmed provider.
- Pay application, examination, initial-license, and renewal fees applicable to the license.
- Maintain required continuing education and renew by the applicable state or local deadline.
Timeline: Denver contractor-license applications generally require approximately 7-10 business days for online or in-person review and up to 14 business days by mail. State timelines vary by license and application completeness.
Apply/Manage Online: State licensing resources and portals are available via DORA: https://dora.colorado.gov/licensing-and-permitting
Reciprocity
Colorado offers endorsement pathways for state-regulated trades. For electricians, endorsement requires an active state-issued license obtained by examination under the current National Electrical Code and verification from the issuing state. For plumbers, endorsement requires substantially equivalent qualifications, qualifying apprenticeship or experience, a comparable examination based on the currently adopted Colorado code, and a current state-issued license held for at least six months.
Limitations: Colorado does not accept city or county licenses for plumbing endorsement. The City and County of Denver does not accept or reciprocate contractor licenses or certificates from other counties or states.
Frequently Asked Questions
How long does it take to get a contractor license in Colorado?
Denver contractor-license applications generally require approximately 7-10 business days for online or in-person review and up to 14 business days by mail. State processing times vary by license type and application completeness.
Can I transfer my license from another state to Colorado?
Colorado evaluates endorsement eligibility for electrical and plumbing licenses. Electrical endorsement requires an active state-issued license obtained by examination under the current National Electrical Code with verification from the issuing state. Plumbing endorsement requires substantially equivalent qualifications, qualifying apprenticeship or experience, a comparable examination based on the currently adopted Colorado code, and a current state-issued license held for at least six months. Denver does not reciprocate local contractor licenses from other counties or states.
What happens if I fail the exam?
Retake policies and waiting periods are set by the licensing board or exam provider. For example, Colorado plumbing exams are administered by PSI; consult the current PSI scheduling and candidate materials or the Board’s website for retake procedures.
Do I need insurance?
Insurance and financial-responsibility requirements depend on the authority. State electrical contractor registration requires evidence of compliance with workers’ compensation and unemployment compensation laws. Local jurisdictions such as Denver may impose additional insurance or bonding to issue contractor licenses — verify with the relevant office before applying.
How do I renew my license?
State electrician licenses renew every 3 years with 24 hours of CE. State plumbing licenses renew every 2 years with at least 8 hours of CE each year (including code-related hours each 24-month period). Many Denver local contractor licenses renew on a 3-year cycle; confirm your specific class and renewal window with Denver CPD.
What if my city has different requirements than what’s shown here?
Local regulations can differ by jurisdiction. The information shown reflects official sources where available, but local requirements govern permitting and licensing. Always verify with your city or county building department to ensure you meet current standards before applying or bidding work.
Where can I find practice tests for Colorado exams?
We offer comprehensive PDF practice tests for Colorado contractor license exams. Each guide typically includes 1,500–2,500 code-focused questions with complete answer keys and reference locators pointing to exact code sections. Study offline at your own pace with no time or use limits. 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.
- Business, Law, and Project Management (NASCLA) Reference Practice Test
- Colorado (Denver) 490 Access Control Supervisor License Practice Test
- Colorado (Denver) 494 Electrical Sign Supervisor License Practice Test
- Colorado (Denver) N11 National Standard General Building Contractor (A) License Practice Test
- Colorado (Denver) N22 National Standard Master Sign Electrician License Practice Test
- Colorado F11 National Standard General Building Contractor (A) License Practice Test
- Colorado F12 National Standard General Building Contractor (B) License - Practice Test
- Colorado F14 National ICC Roofing Contractor & Subcontractor License Practice Test
- Colorado F15 National Standard Shingle Roofing License Practice Test
- Colorado F22 National Standard Master Sign Electrician License Practice Test
- Colorado Journeyman Wireman License Practice Test
- Colorado Journeyworker Plumber (6 plus Year Apprentice) - Practice Test
- Colorado Journeyworker Plumber License - Practice Test
- Colorado Master Electrician License Practice Test
- Colorado Master Plumber License - Practice Test
- Colorado Pikes Peak Building Contractor D-1 Exteriors License Practice Test
- Colorado Pikes Peak Building Contractor D-1 Roofing License Practice Test
- Colorado Pikes Peak Building Contractor D-2A Wrecking Unlimited License Practice Test
- Colorado Residential Plumber License - Practice Test
- Colorado Residential Wireman License Practice Test
- Colorado, Denver General Building Contractor License (A) - G11-N - Exam Practice Test
- Denver Colorado G13 National Standard Residential Building Contractor (C) Practice Test
- F12 Colorado Pikes Peak Regional Building Contractor B-1, B-2 (Limited Commercial) License Practice Test
- Installing Hardwood Flooring NOFMA - Reference Practice Test
- National Electrical Code (NEC) 2017 Practice Test
- National Electrical Code (NEC) 2017 Supplemental Articles Practice Test
- National Electrical Code (NEC) 2017 Supplemental Articles Practice Test (supp. 2)
Related Official Resources
Official Sources for Further Details:
-
Colorado State Electrical Board
https://dpo.colorado.gov/Electrical
Official Board Site | Accessed: 2026-10-21 -
Colorado Electrical Board Applications and Forms
https://dpo.colorado.gov/Electrical/Applications
Official Board Site | Accessed: 2026-10-21 -
Colorado State Plumbing Board
https://dpo.colorado.gov/Plumbing
Official Board Site | Accessed: 2026-10-21 -
Colorado Plumbing Board Applications and Forms
https://dpo.colorado.gov/Plumbing/Applications
Official Board Site | Accessed: 2026-10-21 -
Colorado Division of Water Resources
https://dwr.colorado.gov/public-information/boards-and-commissions
Official State Agency Site | Accessed: 2026-10-21 -
Colorado Department of Public Health and Environment
https://cdphe.colorado.gov/apcd-asbestos-support
Official State Agency Site | Accessed: 2026-10-21 -
City and County of Denver Contractor Licensing
https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing
Official City Site | Accessed: 2026-10-21 -
Denver Contractor Licensing Fees
https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing/CL-Resources-and-Downloads/Fees-for-Contractor-Licenses-and-Supervisor-Certificates
Official Fee Schedule | Accessed: 2026-10-21 -
Denver Mechanical Certificates
https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing/Supervisor-Certificates/Mechanical-Certificates
Official City Site | Accessed: 2026-10-21 -
Denver Specialty Class D Certificates
https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Contractor-Licensing/Supervisor-Certificates/Specialty-Class-D-Certificates
Official City Site | Accessed: 2026-10-21
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:
- Website: https://dpo.colorado.gov/
- Phone: 303-894-7800
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.